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ice: E0277 points at nonexisting .await #113203

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matthiaskrgr opened this issue Jun 30, 2023 · 4 comments · Fixed by #114584
Closed

ice: E0277 points at nonexisting .await #113203

matthiaskrgr opened this issue Jun 30, 2023 · 4 comments · Fixed by #114584
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@darklyspaced
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A-diagnostics Area: Messages for errors, warnings, and lints A-parser Area: The parsing of Rust source code to an AST C-bug Category: This is a bug. E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-debug-assertions This issue requires a build of rustc or tooling with debug-assertions in some way T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@matthiaskrgr
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matthiaskrgr commented Jun 30, 2023 •
edited by rustbot
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Code

rustc --edition=2018 file.rs

// --edition 2018

fn main() {
    await{}()
}

the zero sized span at the .await causes the debug ice

error[E0277]: `()` is not a future
 --> treereduce2.out:4:5
  |
4 |     await{}()
  |     ^^^^^  - help: remove the `.await`
  |     |
  |     `()` is not a future
  |

Meta

rustc --version --verbose:

330727467b8fdf2c43b95095a0efae7012c4f83b with debug assertions

Error output

error: incorrect use of `await`
 --> treereduce2.out:4:5
  |
4 |     await{}()
  |     ^^^^^^^ help: `await` is a postfix operation: `{}.await`

error[E0728]: `await` is only allowed inside `async` functions and blocks
 --> treereduce2.out:4:5
  |
3 | fn main() {
  |    ---- this is not `async`
4 |     await{}()
  |     ^^^^^ only allowed inside `async` functions and blocks

error[E0277]: `()` is not a future
 --> treereduce2.out:4:5
  |
4 |     await{}()
  |     ^^^^^  - help: remove the `.await`
  |     |
  |     `()` is not a future
  |
  = help: the trait `Future` is not implemented for `()`
  = note: () must be a future or must implement `IntoFuture` to be awaited
  = note: required for `()` to implement `IntoFuture`

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0277, E0728.
For more information about an error, try `rustc --explain E0277`.
Backtrace 

thread 'rustc' panicked at 'Span must not be empty and have no suggestion', /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:706:9
stack backtrace:
   0:     0x7f98172871c6 - std::backtrace_rs::backtrace::libunwind::trace::h3b6f3958cfae5377
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f98172871c6 - std::backtrace_rs::backtrace::trace_unsynchronized::hba0866c62f865804
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f98172871c6 - std::sys_common::backtrace::_print_fmt::h461d5205fa46ab52
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f98172871c6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd23e0c88b75add1c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f981734b838 - core::fmt::rt::Argument::fmt::h4f8c28fcc5e0c6ce
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/rt.rs:138:9
   5:     0x7f981734b838 - core::fmt::write::h7d46c21d618fb808
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f98172c34df - std::io::Write::write_fmt::he0c42c5b1963312d
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/io/mod.rs:1714:15
   7:     0x7f9817286fc5 - std::sys_common::backtrace::_print::ha09d072c418bb9f3
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f9817286fc5 - std::sys_common::backtrace::print::h62c64c91ab9fc24c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f98172e143c - std::panicking::default_hook::{{closure}}::h80ca51e5ae0d6e99
  10:     0x7f98172e1119 - std::panicking::default_hook::h52195cc8274e026a
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:288:9
  11:     0x7f9818e8330b - <alloc[59fef786b468a15e]::boxed::Box<dyn for<'a, 'b> core[ad2aefeb2646d5e0]::ops::function::Fn<(&'a core[ad2aefeb2646d5e0]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[ad2aefeb2646d5e0]::marker::Sync + core[ad2aefeb2646d5e0]::marker::Send> as core[ad2aefeb2646d5e0]::ops::function::Fn<(&core[ad2aefeb2646d5e0]::panic::panic_info::PanicInfo,)>>::call
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2024:9
  12:     0x7f9818e8330b - rustc_driver_impl[df9a94172e917073]::install_ice_hook::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:1303:13
  13:     0x7f98172e1c15 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h69c000f778b2bc36
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2024:9
  14:     0x7f98172e1c15 - std::panicking::rust_panic_with_hook::hb1c4833de90b47ba
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:709:13
  15:     0x7f9817287491 - std::panicking::begin_panic_handler::{{closure}}::h4c87999714b0dc12
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:595:13
  16:     0x7f98172872a6 - std::sys_common::backtrace::__rust_end_short_backtrace::h66b7903c065a3e86
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:151:18
  17:     0x7f98172e1782 - rust_begin_unwind
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:593:5
  18:     0x7f9817281433 - core::panicking::panic_fmt::hb3d3573ea68cbca7
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:67:14
  19:     0x7f981b19b3e0 - <rustc_errors[56ab9bb9c5bf08f1]::diagnostic::Diagnostic>::span_suggestion_with_style::<&str, &str>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:706:9
  20:     0x7f981b27605b - <rustc_errors[56ab9bb9c5bf08f1]::diagnostic::Diagnostic>::span_suggestion::<&str, &str>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:687:9
  21:     0x7f981b27605b - <rustc_infer[bbddb35e20e57be7]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[99a87dbe658f5ec3]::traits::error_reporting::suggestions::TypeErrCtxtExt>::suggest_remove_await
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs:1631:21
  22:     0x7f981b28a52a - <rustc_infer[bbddb35e20e57be7]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[99a87dbe658f5ec3]::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs:897:25
  23:     0x7f981b29aa19 - <rustc_infer[bbddb35e20e57be7]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[99a87dbe658f5ec3]::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs:1534:17
  24:     0x7f981b286e13 - <rustc_infer[bbddb35e20e57be7]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[99a87dbe658f5ec3]::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs:475:21
  25:     0x7f98193fbaf9 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::select_obligations_where_possible::<<rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_argument_types::{closure#1}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs:601:13
  26:     0x7f98193fbaf9 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_argument_types
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:344:17
  27:     0x7f98193bd0e1 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::confirm_builtin_call
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/callee.rs:454:9
  28:     0x7f98193bb84c - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_call
  29:     0x7f981945584f - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:338:45
  30:     0x7f98193d70fa - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:241:18
  31:     0x7f98193d70fa - stacker[da3c16f82a086d7c]::maybe_grow::<rustc_middle[1e2433a00aeefc0b]::ty::Ty, <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  32:     0x7f98193d70fa - rustc_data_structures[218407984dcef0d]::stack::ensure_sufficient_stack::<rustc_middle[1e2433a00aeefc0b]::ty::Ty, <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  33:     0x7f98193d70fa - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:237:18
  34:     0x7f98194549e9 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:191:9
  35:     0x7f981944830f - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_meets_expectation_or_error::<<rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::demand_scrutinee_type::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:84:22
  36:     0x7f981944830f - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_has_type_or_error::<<rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::demand_scrutinee_type::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:74:9
  37:     0x7f981944830f - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::demand_scrutinee_type
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/_match.rs:489:13
  38:     0x7f981944830f - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_match::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/_match.rs:27:28
  39:     0x7f981944830f - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_match
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/_match.rs:23:19
  40:     0x7f98194554bd - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:334:17
  41:     0x7f98193d70fa - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:241:18
  42:     0x7f98193d70fa - stacker[da3c16f82a086d7c]::maybe_grow::<rustc_middle[1e2433a00aeefc0b]::ty::Ty, <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  43:     0x7f98193d70fa - rustc_data_structures[218407984dcef0d]::stack::ensure_sufficient_stack::<rustc_middle[1e2433a00aeefc0b]::ty::Ty, <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  44:     0x7f98193d70fa - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:237:18
  45:     0x7f98194549e9 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:191:9
  46:     0x7f98193ba6a7 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:164:9
  47:     0x7f98193ba6a7 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_call
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/callee.rs:89:18
  48:     0x7f981945584f - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:338:45
  49:     0x7f98193d70fa - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:241:18
  50:     0x7f98193d70fa - stacker[da3c16f82a086d7c]::maybe_grow::<rustc_middle[1e2433a00aeefc0b]::ty::Ty, <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  51:     0x7f98193d70fa - rustc_data_structures[218407984dcef0d]::stack::ensure_sufficient_stack::<rustc_middle[1e2433a00aeefc0b]::ty::Ty, <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  52:     0x7f98193d70fa - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:237:18
  53:     0x7f98194549e9 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:191:9
  54:     0x7f981940599d - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_block_with_expected::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1589:44
  55:     0x7f981940599d - <core[ad2aefeb2646d5e0]::option::Option<&rustc_hir[960286a409f19beb]::hir::Expr>>::map::<(&rustc_hir[960286a409f19beb]::hir::Expr, rustc_middle[1e2433a00aeefc0b]::ty::Ty), <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_block_with_expected::{closure#0}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/option.rs:1075:29
  56:     0x7f981940599d - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_block_with_expected::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1589:26
  57:     0x7f981940599d - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::with_breakable_ctxt::<<rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_block_with_expected::{closure#0}, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs:1523:22
  58:     0x7f981940599d - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_block_with_expected
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1581:26
  59:     0x7f981945547a - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:337:41
  60:     0x7f98193d70fa - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:241:18
  61:     0x7f98193d70fa - stacker[da3c16f82a086d7c]::maybe_grow::<rustc_middle[1e2433a00aeefc0b]::ty::Ty, <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  62:     0x7f98193d70fa - rustc_data_structures[218407984dcef0d]::stack::ensure_sufficient_stack::<rustc_middle[1e2433a00aeefc0b]::ty::Ty, <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  63:     0x7f98193d70fa - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:237:18
  64:     0x7f98194549e9 - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:191:9
  65:     0x7f98193d8eff - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_expr_with_hint
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:143:9
  66:     0x7f98193d8eff - <rustc_hir_typeck[57dbf10003e91c2a]::fn_ctxt::FnCtxt>::check_return_expr
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:824:30
  67:     0x7f98195001fa - rustc_hir_typeck[57dbf10003e91c2a]::check::check_fn
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/check.rs:117:5
  68:     0x7f98195bac44 - rustc_hir_typeck[57dbf10003e91c2a]::typeck_with_fallback::<rustc_hir_typeck[57dbf10003e91c2a]::typeck::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/lib.rs:214:9
  69:     0x7f98195bac44 - rustc_hir_typeck[57dbf10003e91c2a]::typeck_with_fallback::<rustc_hir_typeck[57dbf10003e91c2a]::typeck::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/lib.rs:174:36
  70:     0x7f98195bac44 - rustc_hir_typeck[57dbf10003e91c2a]::typeck
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/lib.rs:156:5
  71:     0x7f981a96bd43 - rustc_query_impl[7a0377d14470f94a]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:582:47
  72:     0x7f981a96bd43 - rustc_query_impl[7a0377d14470f94a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7a0377d14470f94a]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:506:18
  73:     0x7f981aaac6eb - rustc_query_impl[7a0377d14470f94a]::query_impl::typeck::dynamic_query::{closure#2}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:578:25
  74:     0x7f981aaac6eb - <rustc_query_impl[7a0377d14470f94a]::query_impl::typeck::dynamic_query::{closure#2} as core[ad2aefeb2646d5e0]::ops::function::FnOnce<(rustc_middle[1e2433a00aeefc0b]::ty::context::TyCtxt, rustc_span[25f1549394aec581]::def_id::LocalDefId)>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
  75:     0x7f981a907926 - <rustc_query_impl[7a0377d14470f94a]::DynamicConfig<rustc_query_system[b0609e3a42ded90a]::query::caches::VecCache<rustc_span[25f1549394aec581]::def_id::LocalDefId, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>, false, false, false> as rustc_query_system[b0609e3a42ded90a]::query::config::QueryConfig<rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt>>::compute
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/lib.rs:116:9
  76:     0x7f981a907926 - rustc_query_system[b0609e3a42ded90a]::query::plumbing::execute_job_non_incr::<rustc_query_impl[7a0377d14470f94a]::DynamicConfig<rustc_query_system[b0609e3a42ded90a]::query::caches::VecCache<rustc_span[25f1549394aec581]::def_id::LocalDefId, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:487:72
  77:     0x7f981a907926 - rustc_middle[1e2433a00aeefc0b]::ty::context::tls::enter_context::<rustc_query_system[b0609e3a42ded90a]::query::plumbing::execute_job_non_incr<rustc_query_impl[7a0377d14470f94a]::DynamicConfig<rustc_query_system[b0609e3a42ded90a]::query::caches::VecCache<rustc_span[25f1549394aec581]::def_id::LocalDefId, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  78:     0x7f981a907926 - <std[1f7b3825eda736b9]::thread::local::LocalKey<core[ad2aefeb2646d5e0]::cell::Cell<*const ()>>>::try_with::<rustc_middle[1e2433a00aeefc0b]::ty::context::tls::enter_context<rustc_query_system[b0609e3a42ded90a]::query::plumbing::execute_job_non_incr<rustc_query_impl[7a0377d14470f94a]::DynamicConfig<rustc_query_system[b0609e3a42ded90a]::query::caches::VecCache<rustc_span[25f1549394aec581]::def_id::LocalDefId, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:270:16
  79:     0x7f981a907926 - <std[1f7b3825eda736b9]::thread::local::LocalKey<core[ad2aefeb2646d5e0]::cell::Cell<*const ()>>>::with::<rustc_middle[1e2433a00aeefc0b]::ty::context::tls::enter_context<rustc_query_system[b0609e3a42ded90a]::query::plumbing::execute_job_non_incr<rustc_query_impl[7a0377d14470f94a]::DynamicConfig<rustc_query_system[b0609e3a42ded90a]::query::caches::VecCache<rustc_span[25f1549394aec581]::def_id::LocalDefId, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:246:9
  80:     0x7f981a907926 - rustc_middle[1e2433a00aeefc0b]::ty::context::tls::enter_context::<rustc_query_system[b0609e3a42ded90a]::query::plumbing::execute_job_non_incr<rustc_query_impl[7a0377d14470f94a]::DynamicConfig<rustc_query_system[b0609e3a42ded90a]::query::caches::VecCache<rustc_span[25f1549394aec581]::def_id::LocalDefId, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  81:     0x7f981a907926 - <rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt as rustc_query_system[b0609e3a42ded90a]::query::QueryContext>::start_query::<rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0609e3a42ded90a]::query::plumbing::execute_job_non_incr<rustc_query_impl[7a0377d14470f94a]::DynamicConfig<rustc_query_system[b0609e3a42ded90a]::query::caches::VecCache<rustc_span[25f1549394aec581]::def_id::LocalDefId, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:149:13
  82:     0x7f981a907926 - rustc_middle[1e2433a00aeefc0b]::ty::context::tls::with_related_context::<<rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt as rustc_query_system[b0609e3a42ded90a]::query::QueryContext>::start_query<rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[b0609e3a42ded90a]::query::plumbing::execute_job_non_incr<rustc_query_impl[7a0377d14470f94a]::DynamicConfig<rustc_query_system[b0609e3a42ded90a]::query::caches::VecCache<rustc_span[25f1549394aec581]::def_id::LocalDefId, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7a0377d14470f94a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[1e2433a00aeefc0b]::query::erase::Erased<[u8; 8usize]>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:133:9

@matthiaskrgr matthiaskrgr added A-diagnostics Area: Messages for errors, warnings, and lints 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. C-bug Category: This is a bug. requires-debug-assertions This issue requires a build of rustc or tooling with debug-assertions in some way labels Jun 30, 2023
@estebank
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This is because the parser recovers from an incorrect await invocation, while the suggestion creates a new Span to include the .. The solution would likely be to either signal that it was a recovered await. Maybe just by replacing the whole thing with an error AST placeholder, or to include a Span in the AST that includes the dot to avoid other issues. I think the first solution is likely better, it would silence any errors in the expression being awaited, but that should be fine in general.

@estebank estebank added A-parser Area: The parsing of Rust source code to an AST E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue. labels Jun 30, 2023
@Alef-gabriel
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Hi guys, I can take this?

@estebank
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Go ahead, @Alef-gabriel! I believe all you'd have to do is change Parser::recover_incorrect_await_syntax to always return self.mk_expr(span, ExprKind::Err) instead of trying to recover.

@Alef-gabriel Alef-gabriel mentioned this issue Jul 2, 2023
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@darklyspaced
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@rustbot claim

@darklyspaced darklyspaced mentioned this issue Aug 7, 2023
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@bors bors closed this as completed in 83756d9 Aug 12, 2023
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A-diagnostics Area: Messages for errors, warnings, and lints A-parser Area: The parsing of Rust source code to an AST C-bug Category: This is a bug. E-easy Call for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-debug-assertions This issue requires a build of rustc or tooling with debug-assertions in some way T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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@matthiaskrgr @estebank @Alef-gabriel @darklyspaced