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Incremental recompilation bug while compiling sysroot with -Zmir-opt-level=2 #74946

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bjorn3 opened this issue Jul 30, 2020 · 6 comments · Fixed by #89476
Closed

Incremental recompilation bug while compiling sysroot with -Zmir-opt-level=2 #74946

bjorn3 opened this issue Jul 30, 2020 · 6 comments · Fixed by #89476
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@cjgillot
Labels
A-incr-comp Area: Incremental compilation A-metadata Area: Crate metadata A-mir-opt Area: MIR optimizations C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@bjorn3
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bjorn3 commented Jul 30, 2020

Code

Assuming that you copied $(rustc --print sysroot)/lib/rustlib/src/rust to ./sysroot_src.

#- Cargo.toml
[package]
authors = ["bjorn3 <bjorn3@users.noreply.github.com>"]
name = "sysroot"
version = "0.0.0"

[dependencies]
core = { path = "./sysroot_src/library/core" }
compiler_builtins = "0.1"
alloc = { path = "./sysroot_src/library/alloc" }
std = { path = "./sysroot_src/library/std", features = ["panic_unwind"] }

[patch.crates-io]
rustc-std-workspace-core = { path = "./sysroot_src/library/rustc-std-workspace-core" }
rustc-std-workspace-alloc = { path = "./sysroot_src/library/rustc-std-workspace-alloc" }
//- src/lib.rs
// empty
RUSTFLAGS="-Zmir-opt-level=2" cargo build; rm -r target/debug/{build,deps,examples}; RUSTFLAGS="-Zmir-opt-level=2" cargo build

Meta

rustc --version --verbose:

rustc 1.47.0-nightly (db0492ace 2020-07-29)
binary: rustc
commit-hash: db0492ace429cfeb3567e2c04e300be7df9972ff
commit-date: 2020-07-29
host: x86_64-unknown-linux-gnu
release: 1.47.0-nightly
LLVM version: 10.0

Error output

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/librustc_metadata/rmeta/decoder.rs:1886:22
Backtrace 

stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at library/std/src/sys_common/backtrace.rs:78
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at library/std/src/sys_common/backtrace.rs:59
   4: core::fmt::write
             at library/core/src/fmt/mod.rs:1117
   5: std::io::Write::write_fmt
             at library/std/src/io/mod.rs:1510
   6: std::sys_common::backtrace::_print
             at library/std/src/sys_common/backtrace.rs:62
   7: std::sys_common::backtrace::print
             at library/std/src/sys_common/backtrace.rs:49
   8: std::panicking::default_hook::{{closure}}
             at library/std/src/panicking.rs:198
   9: std::panicking::default_hook
             at library/std/src/panicking.rs:217
  10: rustc_driver::report_ice
  11: std::panicking::rust_panic_with_hook
             at library/std/src/panicking.rs:530
  12: rust_begin_unwind
             at library/std/src/panicking.rs:437
  13: core::panicking::panic_fmt
             at library/core/src/panicking.rs:85
  14: core::panicking::panic
             at library/core/src/panicking.rs:50
  15: rustc_span::hygiene::decode_expn_id
  16: <rustc_span::hygiene::SyntaxContextData as rustc_serialize::serialize::Decodable>::decode
  17: rustc_span::hygiene::decode_syntax_context
  18: <rustc_metadata::rmeta::decoder::DecodeContext as rustc_serialize::serialize::SpecializedDecoder<rustc_span::span_encoding::Span>>::specialized_decode
  19: <rustc_middle::mir::SourceInfo as rustc_serialize::serialize::Decodable>::decode
  20: <rustc_middle::mir::Statement as rustc_serialize::serialize::Decodable>::decode
  21: rustc_serialize::serialize::Decoder::read_seq
  22: <rustc_middle::mir::BasicBlockData as rustc_serialize::serialize::Decodable>::decode
  23: rustc_serialize::serialize::Decoder::read_seq
  24: <rustc_middle::mir::Body as rustc_serialize::serialize::Decodable>::decode
  25: rustc_metadata::rmeta::decoder::<impl rustc_metadata::creader::CrateMetadataRef>::get_optimized_mir
  26: rustc_metadata::rmeta::decoder::cstore_impl::provide_extern::optimized_mir
  27: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  28: rustc_query_system::query::plumbing::load_from_disk_and_cache_in_memory
  29: rustc_query_system::query::plumbing::get_query_impl
  30: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::instance_mir
  31: rustc_mir::monomorphize::collector::collect_neighbours
  32: rustc_mir::monomorphize::collector::collect_items_rec
  33: rustc_mir::monomorphize::collector::collect_items_rec
  34: rustc_mir::monomorphize::collector::collect_items_rec
  35: rustc_mir::monomorphize::collector::collect_items_rec
  36: rustc_mir::monomorphize::collector::collect_items_rec
  37: rustc_mir::monomorphize::collector::collect_items_rec
  38: rustc_mir::monomorphize::collector::collect_items_rec
  39: rustc_mir::monomorphize::collector::collect_items_rec
  40: rustc_mir::monomorphize::collector::collect_items_rec
  41: rustc_mir::monomorphize::collector::collect_items_rec
  42: rustc_mir::monomorphize::collector::collect_items_rec
  43: rustc_mir::monomorphize::collector::collect_items_rec
  44: rustc_mir::monomorphize::collector::collect_items_rec
  45: rustc_mir::monomorphize::collector::collect_items_rec
  46: rustc_mir::monomorphize::collector::collect_items_rec
  47: rustc_mir::monomorphize::collector::collect_items_rec
  48: rustc_mir::monomorphize::collector::collect_items_rec
  49: rustc_mir::monomorphize::collector::collect_items_rec
  50: rustc_mir::monomorphize::collector::collect_items_rec
  51: rustc_mir::monomorphize::collector::collect_items_rec
  52: rustc_mir::monomorphize::collector::collect_items_rec
  53: rustc_mir::monomorphize::collector::collect_items_rec
  54: rustc_mir::monomorphize::collector::collect_items_rec
  55: rustc_session::utils::<impl rustc_session::session::Session>::time
  56: rustc_mir::monomorphize::collector::collect_crate_mono_items
  57: rustc_mir::monomorphize::partitioning::collect_and_partition_mono_items
  58: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::collect_and_partition_mono_items>::compute
  59: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  60: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  61: rustc_data_structures::stack::ensure_sufficient_stack
  62: rustc_query_system::query::plumbing::force_query_impl
  63: rustc_middle::ty::query::force_from_dep_node
  64: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_previous_green
  65: rustc_query_system::dep_graph::graph::DepGraph<K>::try_mark_green_and_read
  66: rustc_data_structures::stack::ensure_sufficient_stack
  67: rustc_query_system::query::plumbing::get_query_impl
  68: rustc_metadata::rmeta::encoder::EncodeContext::encode_crate_root
  69: rustc_metadata::rmeta::encoder::encode_metadata_impl
  70: rustc_data_structures::sync::join
  71: rustc_metadata::rmeta::decoder::cstore_impl::<impl rustc_middle::middle::cstore::CrateStore for rustc_metadata::creader::CStore>::encode_metadata
  72: rustc_middle::ty::context::TyCtxt::encode_metadata
  73: rustc_interface::passes::start_codegen
  74: rustc_middle::ty::context::tls::enter_global
  75: rustc_interface::queries::Queries::ongoing_codegen
  76: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  77: rustc_span::with_source_map
  78: rustc_interface::interface::create_compiler_and_run
  79: scoped_tls::ScopedKey<T>::set
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.47.0-nightly (db0492ace 2020-07-29) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z mir-opt-level=2 -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type dylib --crate-type rlib

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [optimized_mir] optimizing MIR for `<alloc_crate::vec::IntoIter<T> as core::iter::Iterator>::next`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
#2 [exported_symbols] exported_symbols
end of query stack

@bjorn3 bjorn3 added C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 30, 2020
@bjorn3 bjorn3 changed the title Incremental recompilation bug while compiling sysroot Incremental recompilation bug while compiling sysroot with -Zmir-opt-level=2 Jul 30, 2020
@jonas-schievink jonas-schievink added A-incr-comp Area: Incremental compilation A-metadata Area: Crate metadata labels Jul 30, 2020
@bjorn3 bjorn3 mentioned this issue Aug 16, 2020
Closed
bjorn3 added a commit to rust-lang/rustc_codegen_cranelift that referenced this issue Aug 19, 2020
@bjorn3
Add workaround for rust-lang/rust#74946
33b6a90 
Fixes #1072
@pnkfelix
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pnkfelix commented Dec 1, 2020 •
edited
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I reproduced this ICE locally.

On my end I did it by copying the git checkout of rust.git into ./sysroot_src, because I wasn't able to figure out the right rustup invocation to get it setup with files in $(rustc +nightly --print sysroot)/lib/rustlib/src/rust

  • (Oh, whoops, I think I was accidentally passing --target instead of --toolchain. Of course that wasn't going to work.)

well, not 100%, my query stack was a little different:

query stack during panic:
#0 [optimized_mir] optimizing MIR for `alloc::alloc::Global::alloc_impl`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack

but it seemed like a similar bug, nonetheless.

@pnkfelix
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pnkfelix commented Dec 1, 2020

@rustbot modify labels: +I-prioritize

@rustbot rustbot added the I-prioritize Issue: Indicates that prioritization has been requested for this issue. label Dec 1, 2020
@camelid camelid added the A-mir-opt Area: MIR optimizations label Dec 1, 2020
@apiraino apiraino added P-medium Medium priority and removed I-prioritize Issue: Indicates that prioritization has been requested for this issue. labels Dec 2, 2020
@apiraino
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apiraino commented Dec 2, 2020

Assigning P-medium as discussed as part of the Prioritization Working Group procedure and removing I-prioritize.

@bjorn3
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bjorn3 commented Jun 8, 2021

Now happens for gimli when retrying the repro. (with -Zmir-opt-level=2 replaced with -Zmir-opt-level=3 as it was changed in rustc)

backtrace 
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_metadata/src/rmeta/decoder.rs:400:22
stack backtrace:
   0: rust_begin_unwind
             at /rustc/e4a60327063e82413eed50a10df3b7d19b77bda0/library/std/src/panicking.rs:515:5
   1: core::panicking::panic_fmt
             at /rustc/e4a60327063e82413eed50a10df3b7d19b77bda0/library/core/src/panicking.rs:92:14
   2: core::panicking::panic
             at /rustc/e4a60327063e82413eed50a10df3b7d19b77bda0/library/core/src/panicking.rs:50:5
   3: rustc_metadata::rmeta::decoder::<impl rustc_serialize::serialize::Decodable<rustc_metadata::rmeta::decoder::DecodeContext> for rustc_span::hygiene::ExpnId>::decode
   4: rustc_span::hygiene::_DERIVE_rustc_serialize_Decodable_D_FOR_SyntaxContextData::<impl rustc_serialize::serialize::Decodable<__D> for rustc_span::hygiene::SyntaxContextData>::decode
   5: rustc_metadata::rmeta::decoder::<impl rustc_serialize::serialize::Decodable<rustc_metadata::rmeta::decoder::DecodeContext> for rustc_span::hygiene::SyntaxContext>::decode
   6: rustc_metadata::rmeta::decoder::<impl rustc_serialize::serialize::Decodable<rustc_metadata::rmeta::decoder::DecodeContext> for rustc_span::span_encoding::Span>::decode
   7: rustc_span::hygiene::_DERIVE_rustc_serialize_Decodable_D_FOR_ExpnData::<impl rustc_serialize::serialize::Decodable<__D> for rustc_span::hygiene::ExpnData>::decode
   8: rustc_metadata::rmeta::decoder::<impl rustc_serialize::serialize::Decodable<rustc_metadata::rmeta::decoder::DecodeContext> for rustc_span::hygiene::ExpnId>::decode
   9: rustc_span::hygiene::_DERIVE_rustc_serialize_Decodable_D_FOR_SyntaxContextData::<impl rustc_serialize::serialize::Decodable<__D> for rustc_span::hygiene::SyntaxContextData>::decode
  10: rustc_metadata::rmeta::decoder::<impl rustc_serialize::serialize::Decodable<rustc_metadata::rmeta::decoder::DecodeContext> for rustc_span::hygiene::SyntaxContext>::decode
  11: rustc_metadata::rmeta::decoder::<impl rustc_serialize::serialize::Decodable<rustc_metadata::rmeta::decoder::DecodeContext> for rustc_span::span_encoding::Span>::decode
  12: rustc_middle::mir::_DERIVE_rustc_serialize_Decodable_D_FOR_Statement::<impl rustc_serialize::serialize::Decodable<__D> for rustc_middle::mir::Statement>::decode
  13: rustc_serialize::serialize::Decoder::read_seq
  14: rustc_middle::mir::_DERIVE_rustc_serialize_Decodable_D_FOR_BasicBlockData::<impl rustc_serialize::serialize::Decodable<__D> for rustc_middle::mir::BasicBlockData>::decode
  15: rustc_serialize::serialize::Decoder::read_seq
  16: rustc_middle::mir::_DERIVE_rustc_serialize_Decodable_D_FOR_Body::<impl rustc_serialize::serialize::Decodable<__D> for rustc_middle::mir::Body>::decode
  17: rustc_metadata::rmeta::decoder::<impl rustc_metadata::creader::CrateMetadataRef>::get_optimized_mir
  18: rustc_metadata::rmeta::decoder::cstore_impl::provide_extern::optimized_mir
  19: rustc_query_system::query::plumbing::get_query_impl
  20: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::optimized_mir
  21: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::instance_mir
  22: rustc_mir::transform::inline::cycle::mir_inliner_callees
  23: rustc_query_impl::<impl rustc_query_system::query::config::QueryAccessors<rustc_query_impl::plumbing::QueryCtxt> for rustc_query_impl::queries::mir_inliner_callees>::compute
  24: rustc_data_structures::stack::ensure_sufficient_stack
  25: rustc_query_system::query::plumbing::get_query_impl
  26: rustc_query_system::query::plumbing::get_query
  27: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::mir_inliner_callees
  28: rustc_mir::transform::inline::cycle::mir_callgraph_reachable::process
  29: rustc_data_structures::stack::ensure_sufficient_stack
  30: rustc_mir::transform::inline::cycle::mir_callgraph_reachable::process
  31: rustc_data_structures::stack::ensure_sufficient_stack
  32: rustc_mir::transform::inline::cycle::mir_callgraph_reachable::process
  33: rustc_data_structures::stack::ensure_sufficient_stack
  34: rustc_mir::transform::inline::cycle::mir_callgraph_reachable::process
  35: rustc_mir::transform::inline::cycle::mir_callgraph_reachable
  36: rustc_query_impl::<impl rustc_query_system::query::config::QueryAccessors<rustc_query_impl::plumbing::QueryCtxt> for rustc_query_impl::queries::mir_callgraph_reachable>::compute
  37: rustc_data_structures::stack::ensure_sufficient_stack
  38: rustc_query_system::query::plumbing::get_query_impl
  39: rustc_query_system::query::plumbing::get_query
  40: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::mir_callgraph_reachable
  41: rustc_mir::transform::inline::Inliner::try_inlining
  42: rustc_mir::transform::inline::Inliner::process_blocks
  43: <rustc_mir::transform::inline::Inline as rustc_mir::transform::MirPass>::run_pass
  44: rustc_mir::transform::run_passes
  45: rustc_mir::transform::optimized_mir
  46: rustc_query_system::query::plumbing::get_query_impl
  47: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::optimized_mir
  48: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::instance_mir
  49: rustc_mir::transform::inline::Inliner::try_inlining
  50: rustc_mir::transform::inline::Inliner::process_blocks
  51: <rustc_mir::transform::inline::Inline as rustc_mir::transform::MirPass>::run_pass
  52: rustc_mir::transform::run_passes
  53: rustc_mir::transform::optimized_mir
  54: rustc_query_system::query::plumbing::get_query_impl
  55: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::optimized_mir
  56: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::instance_mir
  57: rustc_mir::transform::inline::Inliner::try_inlining
  58: rustc_mir::transform::inline::Inliner::process_blocks
  59: <rustc_mir::transform::inline::Inline as rustc_mir::transform::MirPass>::run_pass
  60: rustc_mir::transform::run_passes
  61: rustc_mir::transform::optimized_mir
  62: rustc_query_system::query::plumbing::get_query_impl
  63: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::optimized_mir
  64: rustc_metadata::rmeta::encoder::EncodeContext::encode_crate_root
  65: rustc_metadata::rmeta::encoder::encode_metadata_impl
  66: rustc_data_structures::sync::join
  67: rustc_metadata::rmeta::decoder::cstore_impl::<impl rustc_middle::middle::cstore::CrateStore for rustc_metadata::creader::CStore>::encode_metadata
  68: rustc_middle::ty::context::TyCtxt::encode_metadata
  69: rustc_interface::passes::QueryContext::enter
  70: rustc_interface::queries::Queries::ongoing_codegen
  71: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  72: rustc_span::with_source_map
  73: rustc_interface::interface::create_compiler_and_run
  74: rustc_span::with_session_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

error: Unrecognized option: 'clif'

error: could not compile `gimli`

To learn more, run the command again with --verbose.

It also gives an unstable fingerprint ICE for alloc::alloc::box_free when compiling panic_abort:

backtrace 
thread 'rustc' panicked at 'Found unstable fingerprints for optimized_mir(alloc[3368]::alloc::box_free): Body { basic_blocks: [BasicBlockData { statements: [StorageLive(_3), StorageLive(_4), StorageLive(_5), StorageLive(_6), _6 = &_1, StorageLive(_19), StorageLive(_20), _20 = (*_6), StorageLive(_21), _21 = (_20.0: *const T), _19 = move _21 as *mut T (Misc), StorageDead(_21), StorageDead(_20), _5 = &(*_19), StorageDead(_19), _4 = &raw const (*_5), StorageDead(_6)], terminator: Some(Terminator { source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:20: 331:45 (#0), scope: scope[1] }, kind: _3 = core::intrinsics::size_of_val::<T>(move _4) -> bb1 }), is_cleanup: false }, BasicBlockData { statements: [StorageDead(_4), StorageDead(_5), StorageLive(_7), StorageLive(_8), StorageLive(_9), StorageLive(_10), _10 = &_1, StorageLive(_22), StorageLive(_23), _23 = (*_10), StorageLive(_24), _24 = (_23.0: *const T), _22 = move _24 as *mut T (Misc), StorageDead(_24), StorageDead(_23), _9 = &(*_22), StorageDead(_22), _8 = &raw const (*_9), StorageDead(_10)], terminator: Some(Terminator { source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:21: 332:51 (#0), scope: scope[2] }, kind: _7 = core::intrinsics::min_align_of_val::<T>(move _8) -> bb2 }), is_cleanup: false }, BasicBlockData { statements: [StorageDead(_8), StorageDead(_9), StorageLive(_11), StorageLive(_12), _12 = _3, StorageLive(_13), _13 = _7, StorageLive(_25), _25 = _12, StorageLive(_26), StorageLive(_27), _27 = _13, StorageLive(_28), _28 = _27, (_26.0: usize) = move _28, StorageDead(_28), StorageDead(_27), (_11.0: usize) = move _25, (_11.1: core::num::NonZeroUsize) = move _26, StorageDead(_26), StorageDead(_25), StorageDead(_13), StorageDead(_12), StorageLive(_14), _14 = &_2, StorageLive(_15), StorageLive(_16), StorageLive(_17), _17 = _1, StorageLive(_29), StorageLive(_30), StorageLive(_31), _31 = _17, StorageLive(_32), _32 = (_31.0: *const T), _30 = move _32 as *mut T (Misc), StorageDead(_32), StorageDead(_31), _29 = move _30 as *mut u8 (Misc), StorageDead(_30), StorageLive(_33), StorageLive(_34), StorageLive(_35), _35 = _29, _34 = move _35 as *const u8 (Pointer(MutToConstPointer)), StorageDead(_35), _33 = _34, (_16.0: *const u8) = move _33, StorageDead(_33), StorageDead(_34), StorageDead(_29), StorageDead(_17), StorageLive(_36), _36 = move _16, StorageLive(_37), StorageLive(_38), _38 = _36, StorageLive(_39), _39 = (_38.0: *const u8), _37 = move _39 as *mut u8 (Misc), StorageDead(_39), StorageDead(_38), StorageLive(_40), StorageLive(_41), StorageLive(_42), _42 = _37, _41 = move _42 as *const u8 (Pointer(MutToConstPointer)), StorageDead(_42), _40 = _41, (_15.0: *const u8) = move _40, StorageDead(_40), StorageDead(_41), StorageDead(_37), StorageDead(_36), StorageDead(_16), StorageLive(_18), _18 = _11], terminator: Some(Terminator { source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:9: 334:52 (#0), scope: scope[4] }, kind: _0 = <A as core::alloc::Allocator>::deallocate(move _14, move _15, move _18) -> bb3 }), is_cleanup: false }, BasicBlockData { statements: [StorageDead(_18), StorageDead(_15), StorageDead(_14), StorageDead(_11), StorageDead(_7), StorageDead(_3)], terminator: Some(Terminator { source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:336:1: 336:2 (#0), scope: scope[0] }, kind: drop(_2) -> bb4 }), is_cleanup: false }, BasicBlockData { statements: [], terminator: Some(Terminator { source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:336:2: 336:2 (#0), scope: scope[0] }, kind: return }), is_cleanup: false }], phase: Optimization, source: MirSource { instance: Item(WithOptConstParam { did: DefId(4:50 ~ alloc[3368]::alloc::box_free), const_param_did: None }), promoted: None }, source_scopes: [SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:329:1: 336:2 (#0), parent_scope: None, inlined: None, inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:330:5: 335:6 (#0), parent_scope: Some(scope[0]), inlined: None, inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:9: 335:6 (#0), parent_scope: Some(scope[1]), inlined: None, inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:9: 335:6 (#0), parent_scope: Some(scope[2]), inlined: None, inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:9: 335:6 (#0), parent_scope: Some(scope[3]), inlined: None, inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#472), parent_scope: Some(scope[1]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2164 ~ core[e765]::ptr::unique::{impl#3}::as_ref), const_param_did: None }), substs: [T] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#0))), inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#473), parent_scope: Some(scope[5]), inlined: None, inlined_parent_scope: Some(scope[5]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#474), parent_scope: Some(scope[6]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2163 ~ core[e765]::ptr::unique::{impl#3}::as_ptr), const_param_did: None }), substs: [T] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#477))), inlined_parent_scope: Some(scope[5]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#478), parent_scope: Some(scope[2]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2164 ~ core[e765]::ptr::unique::{impl#3}::as_ref), const_param_did: None }), substs: [T] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#0))), inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#479), parent_scope: Some(scope[8]), inlined: None, inlined_parent_scope: Some(scope[8]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#480), parent_scope: Some(scope[9]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2163 ~ core[e765]::ptr::unique::{impl#3}::as_ptr), const_param_did: None }), substs: [T] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#481))), inlined_parent_scope: Some(scope[8]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#482), parent_scope: Some(scope[3]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:12441 ~ core[e765]::alloc::layout::{impl#0}::from_size_align_unchecked), const_param_did: None }), substs: [] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#0))), inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#483), parent_scope: Some(scope[11]), inlined: None, inlined_parent_scope: Some(scope[11]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#484), parent_scope: Some(scope[12]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:21084 ~ core[e765]::num::nonzero::{impl#35}::new_unchecked), const_param_did: None }), substs: [] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#486))), inlined_parent_scope: Some(scope[11]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#487), parent_scope: Some(scope[13]), inlined: None, inlined_parent_scope: Some(scope[13]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#489), parent_scope: Some(scope[4]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2166 ~ core[e765]::ptr::unique::{impl#3}::cast), const_param_did: None }), substs: [T, u8] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#0))), inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#490), parent_scope: Some(scope[15]), inlined: None, inlined_parent_scope: Some(scope[15]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#491), parent_scope: Some(scope[16]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2163 ~ core[e765]::ptr::unique::{impl#3}::as_ptr), const_param_did: None }), substs: [T] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#493))), inlined_parent_scope: Some(scope[15]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#494), parent_scope: Some(scope[16]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2161 ~ core[e765]::ptr::unique::{impl#3}::new_unchecked), const_param_did: None }), substs: [u8] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#496))), inlined_parent_scope: Some(scope[15]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#497), parent_scope: Some(scope[18]), inlined: None, inlined_parent_scope: Some(scope[18]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#500), parent_scope: Some(scope[4]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2772 ~ core[e765]::convert::{impl#3}::into), const_param_did: None }), substs: [core::ptr::Unique<u8>, core::ptr::NonNull<u8>] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#0))), inlined_parent_scope: None, local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#501), parent_scope: Some(scope[20]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2114 ~ core[e765]::ptr::non_null::{impl#16}::from), const_param_did: None }), substs: [u8] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#502))), inlined_parent_scope: Some(scope[20]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#503), parent_scope: Some(scope[21]), inlined: None, inlined_parent_scope: Some(scope[21]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#504), parent_scope: Some(scope[22]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2163 ~ core[e765]::ptr::unique::{impl#3}::as_ptr), const_param_did: None }), substs: [u8] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#506))), inlined_parent_scope: Some(scope[21]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#507), parent_scope: Some(scope[22]), inlined: Some((Instance { def: Item(WithOptConstParam { did: DefId(1:2057 ~ core[e765]::ptr::non_null::{impl#3}::new_unchecked), const_param_did: None }), substs: [u8] }, /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#510))), inlined_parent_scope: Some(scope[21]), local_data: Clear }, SourceScopeData { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#511), parent_scope: Some(scope[24]), inlined: None, inlined_parent_scope: Some(scope[24]), local_data: Clear }], generator: None, local_decls: [LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: None, ty: (), user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:329:82: 329:82 (#0), scope: scope[0] } }, LocalDecl { mutability: Not, local_info: Some(User(Clear)), internal: false, is_block_tail: None, ty: core::ptr::Unique<T>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:329:56: 329:59 (#0), scope: scope[0] } }, LocalDecl { mutability: Not, local_info: Some(User(Clear)), internal: false, is_block_tail: None, ty: A, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:329:72: 329:77 (#0), scope: scope[0] } }, LocalDecl { mutability: Not, local_info: Some(User(Clear)), internal: false, is_block_tail: None, ty: usize, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:13: 331:17 (#0), scope: scope[1] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: None, ty: *const T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#0), scope: scope[0] } }, LocalDecl { mutability: Not, local_info: None, internal: false, is_block_tail: None, ty: &T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#0), scope: scope[0] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: None, ty: &core::ptr::Unique<T>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:35 (#0), scope: scope[0] } }, LocalDecl { mutability: Not, local_info: Some(User(Clear)), internal: false, is_block_tail: None, ty: usize, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:13: 332:18 (#0), scope: scope[2] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: None, ty: *const T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#0), scope: scope[0] } }, LocalDecl { mutability: Not, local_info: None, internal: false, is_block_tail: None, ty: &T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#0), scope: scope[0] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: None, ty: &core::ptr::Unique<T>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:41 (#0), scope: scope[0] } }, LocalDecl { mutability: Not, local_info: Some(User(Clear)), internal: false, is_block_tail: None, ty: core::alloc::Layout, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:13: 333:19 (#0), scope: scope[3] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: None, ty: usize, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:56: 333:60 (#0), scope: scope[0] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: None, ty: usize, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:62: 333:67 (#0), scope: scope[0] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: true, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:9: 334:52 (#0) }), ty: &A, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:9: 334:14 (#0), scope: scope[0] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: true, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:9: 334:52 (#0) }), ty: core::ptr::NonNull<u8>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#0), scope: scope[0] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: true, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:9: 334:52 (#0) }), ty: core::ptr::Unique<u8>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#0), scope: scope[0] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: true, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:9: 334:52 (#0) }), ty: core::ptr::Unique<T>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:29 (#0), scope: scope[0] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: true, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:9: 334:52 (#0) }), ty: core::alloc::Layout, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:45: 334:51 (#0), scope: scope[0] } }, LocalDecl { mutability: Not, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:118:18: 118:33 (#0) }), ty: *mut T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#514), scope: scope[5] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:118:18: 118:33 (#0) }), ty: core::ptr::Unique<T>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#515), scope: scope[5] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:106:9: 106:31 (#0) }), ty: *const T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#516), scope: scope[7] } }, LocalDecl { mutability: Not, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:118:18: 118:33 (#0) }), ty: *mut T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#518), scope: scope[8] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:118:18: 118:33 (#0) }), ty: core::ptr::Unique<T>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#519), scope: scope[8] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:106:9: 106:31 (#0) }), ty: *const T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#520), scope: scope[10] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/alloc/layout.rs:100:9: 100:86 (#0) }), ty: usize, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#521), scope: scope[11] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/alloc/layout.rs:100:9: 100:86 (#0) }), ty: core::num::NonZeroUsize, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#522), scope: scope[11] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/alloc/layout.rs:100:48: 100:82 (#0) }), ty: usize, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#523), scope: scope[11] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/num/nonzero.rs:55:30: 55:37 (#379) }), ty: usize, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#524), scope: scope[13] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:139:18: 139:64 (#0) }), ty: *mut u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#527), scope: scope[15] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:139:18: 139:64 (#0) }), ty: *mut T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#528), scope: scope[15] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:139:18: 139:64 (#0) }), ty: core::ptr::Unique<T>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#529), scope: scope[15] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:106:9: 106:31 (#0) }), ty: *const T, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#530), scope: scope[17] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:89:18: 89:68 (#0) }), ty: *const u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#533), scope: scope[18] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:89:18: 89:68 (#0) }), ty: *const u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#535), scope: scope[18] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:89:18: 89:68 (#0) }), ty: *mut u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#538), scope: scope[18] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/convert/mod.rs:538:9: 538:22 (#0) }), ty: core::ptr::Unique<u8>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#540), scope: scope[20] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/non_null.rs:599:18: 599:57 (#0) }), ty: *mut u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#541), scope: scope[21] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/non_null.rs:599:18: 599:57 (#0) }), ty: core::ptr::Unique<u8>, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#542), scope: scope[21] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/unique.rs:106:9: 106:31 (#0) }), ty: *const u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#543), scope: scope[23] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/non_null.rs:163:18: 163:47 (#0) }), ty: *const u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#545), scope: scope[24] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/non_null.rs:163:18: 163:47 (#0) }), ty: *const u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#547), scope: scope[24] } }, LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: Some(BlockTailInfo { tail_result_is_ignored: false, span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/core/src/ptr/non_null.rs:163:18: 163:47 (#0) }), ty: *mut u8, user_ty: None, source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#549), scope: scope[24] } }], user_type_annotations: [], arg_count: 2, spread_arg: None, var_debug_info: [VarDebugInfo { name: "ptr", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:329:56: 329:59 (#0), scope: scope[0] }, value: _1 }, VarDebugInfo { name: "alloc", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:329:72: 329:77 (#0), scope: scope[0] }, value: _2 }, VarDebugInfo { name: "size", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:13: 331:17 (#0), scope: scope[2] }, value: _3 }, VarDebugInfo { name: "align", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:13: 332:18 (#0), scope: scope[3] }, value: _7 }, VarDebugInfo { name: "layout", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:13: 333:19 (#0), scope: scope[4] }, value: _11 }, VarDebugInfo { name: "self", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#551), scope: scope[5] }, value: _6 }, VarDebugInfo { name: "self", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:331:32: 331:44 (#552), scope: scope[7] }, value: _20 }, VarDebugInfo { name: "self", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#555), scope: scope[8] }, value: _10 }, VarDebugInfo { name: "self", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:332:38: 332:50 (#556), scope: scope[10] }, value: _23 }, VarDebugInfo { name: "size", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#557), scope: scope[11] }, value: _12 }, VarDebugInfo { name: "align", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#558), scope: scope[11] }, value: _13 }, VarDebugInfo { name: "n", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:333:22: 333:68 (#559), scope: scope[13] }, value: _27 }, VarDebugInfo { name: "self", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#561), scope: scope[15] }, value: _17 }, VarDebugInfo { name: "self", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#562), scope: scope[17] }, value: _31 }, VarDebugInfo { name: "ptr", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:36 (#564), scope: scope[18] }, value: _29 }, VarDebugInfo { name: "self", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#567), scope: scope[20] }, value: _16 }, VarDebugInfo { name: "unique", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#568), scope: scope[21] }, value: _36 }, VarDebugInfo { name: "self", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#569), scope: scope[23] }, value: _38 }, VarDebugInfo { name: "ptr", source_info: SourceInfo { span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:334:26: 334:43 (#571), scope: scope[24] }, value: _37 }], span: /home/bjorn/Projects/cg_clif2/build_sysroot/sysroot_src/library/alloc/src/alloc.rs:329:1: 336:2 (#0), required_consts: [], is_polymorphic: true, predecessor_cache: PredecessorCache { cache: OnceCell(Uninit) }, is_cyclic: GraphIsCyclicCache { cache: OnceCell(Uninit) } }', /rustc/e4a60327063e82413eed50a10df3b7d19b77bda0/compiler/rustc_query_system/src/query/plumbing.rs:620:9
stack backtrace:
   0: rust_begin_unwind
             at /rustc/e4a60327063e82413eed50a10df3b7d19b77bda0/library/std/src/panicking.rs:515:5
   1: std::panicking::begin_panic_fmt
             at /rustc/e4a60327063e82413eed50a10df3b7d19b77bda0/library/std/src/panicking.rs:457:5
   2: rustc_query_system::query::plumbing::incremental_verify_ich
   3: rustc_query_system::query::plumbing::load_from_disk_and_cache_in_memory
   4: rustc_data_structures::stack::ensure_sufficient_stack
   5: rustc_query_system::query::plumbing::get_query_impl
   6: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::optimized_mir
   7: rustc_middle::ty::<impl rustc_middle::ty::context::TyCtxt>::instance_mir
   8: rustc_mir::monomorphize::collector::collect_neighbours
   9: rustc_mir::monomorphize::collector::collect_items_rec
  10: rustc_mir::monomorphize::collector::collect_items_rec
  11: rustc_mir::monomorphize::collector::collect_items_rec
  12: rustc_session::utils::<impl rustc_session::session::Session>::time
  13: rustc_mir::monomorphize::collector::collect_crate_mono_items
  14: rustc_mir::monomorphize::partitioning::collect_and_partition_mono_items
  15: rustc_query_impl::<impl rustc_query_system::query::config::QueryAccessors<rustc_query_impl::plumbing::QueryCtxt> for rustc_query_impl::queries::collect_and_partition_mono_items>::compute
  16: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  17: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  18: rustc_data_structures::stack::ensure_sufficient_stack
  19: rustc_query_system::query::plumbing::force_query_with_job
  20: rustc_query_system::query::plumbing::get_query_impl
  21: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::collect_and_partition_mono_items
  22: rustc_codegen_cranelift::driver::aot::run_aot
  23: <rustc_codegen_cranelift::CraneliftCodegenBackend as rustc_codegen_ssa::traits::backend::CodegenBackend>::codegen_crate
  24: rustc_interface::passes::QueryContext::enter
  25: rustc_interface::queries::Queries::ongoing_codegen
  26: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  27: rustc_span::with_source_map
  28: rustc_interface::interface::create_compiler_and_run
  29: rustc_span::with_session_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: internal compiler error: unexpected panic

error: Unrecognized option: 'clif'

error: aborting due to previous error

error: could not compile `panic_unwind`

$ rustc -vV
rustc 1.54.0-nightly (e4a603270 2021-06-07)
binary: rustc
commit-hash: e4a60327063e82413eed50a10df3b7d19b77bda0
commit-date: 2021-06-07
host: x86_64-unknown-linux-gnu
release: 1.54.0-nightly
LLVM version: 12.0.1

@tmiasko
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tmiasko commented Oct 2, 2021 •
edited
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The compilation now fails when accessing session in Decodable<DecodeContext<'a, 'tcx>> for ExpnId:

thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_metadata/src/rmeta/decoder.rs:425:33

It looks that expn_hash_to_expn_id decodes ExpnData which in turn decodes ExpnId which in turn requires access to a session, but by the time of expn_hash_to_expn_id call, the session in no longer threaded through.

$ cat a.rs 
fn main() {
    if std::env::var("a").is_ok() {
        println!("b");
    }
}
$ rustc -Zmir-opt-level=3 a.rs -C incremental=incremental
$ rustc -Zmir-opt-level=3 a.rs -C incremental=incremental
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_metadata/src/rmeta/decoder.rs:425:33
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.57.0-nightly (c02371c44 2021-10-01) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z mir-opt-level=3 -C incremental

query stack during panic:
#0 [optimized_mir] optimizing MIR for `main`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack

cc @cjgillot #86676

@cjgillot cjgillot self-assigned this Oct 2, 2021
@cjgillot cjgillot mentioned this issue Oct 2, 2021
Merged
Manishearth added a commit to Manishearth/rust that referenced this issue Oct 3, 2021
@Manishearth
Rollup merge of rust-lang#89476 - cjgillot:expn-id, r=petrochenkov
dd79e4c 
Correct decoding of foreign expansions during incr. comp.

Fixes rust-lang#74946

The original issue was due to a wrong assertion in `expn_hash_to_expn_id`.

The secondary issue was due to a mismatch between the encoding and decoding paths for expansions that are created after the TyCtxt is created.
Manishearth added a commit to Manishearth/rust that referenced this issue Oct 7, 2021
@Manishearth
Rollup merge of rust-lang#89476 - cjgillot:expn-id, r=petrochenkov
e1d9e31 
Correct decoding of foreign expansions during incr. comp.

Fixes rust-lang#74946

The original issue was due to a wrong assertion in `expn_hash_to_expn_id`.

The secondary issue was due to a mismatch between the encoding and decoding paths for expansions that are created after the TyCtxt is created.
Manishearth added a commit to Manishearth/rust that referenced this issue Oct 8, 2021
@Manishearth
Rollup merge of rust-lang#89476 - cjgillot:expn-id, r=petrochenkov
8437cef 
Correct decoding of foreign expansions during incr. comp.

Fixes rust-lang#74946

The original issue was due to a wrong assertion in `expn_hash_to_expn_id`.

The secondary issue was due to a mismatch between the encoding and decoding paths for expansions that are created after the TyCtxt is created.
@bors bors closed this as completed in aed1801 Oct 8, 2021
bjorn3 added a commit to rust-lang/rustc_codegen_cranelift that referenced this issue Oct 17, 2021
@bjorn3
Re-enable incremental compilation for the sysroot
1e5569d 
rust-lang/rust#74946 for fixed
@bjorn3
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bjorn3 commented Oct 17, 2021

I can confirm it works now. Pushed bjorn3/rustc_codegen_cranelift@1e5569d to re-enable incremental compilation for compiling the sysroot.

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A-incr-comp Area: Incremental compilation A-metadata Area: Crate metadata A-mir-opt Area: MIR optimizations C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ P-medium Medium priority T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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Correct decoding of foreign expansions during incr. comp. cjgillot/rust
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@pnkfelix @jonas-schievink @cjgillot @apiraino @bjorn3 @camelid @rustbot @tmiasko