Compiler Panic With RLS: node_type: no type for node expr <Self>::SC_NEGATE_REQS (id=50331)

[zicklag]

I'm working on a rust project, and after running cargo update to update my project dependencies recently, RLS started failing to compile the clap library. Unfortunately I can't remember which libraries it updated when I ran cargo update so I don't know which libraries are the cause.

Here is my Cargo.toml:

[package]
name = "rls-demonstration"
version = "0.1.0"
authors = ["Zicklag"]
edition = "2018"

[dependencies]
# Logging
    # Logging interface
    log = "0.4.6"
    # Used for timestamps
    chrono = "0.4.6"
    # Used for syslog integration
    syslog = "4.0.1"
    # Logging framework
    fern = { version = "0.5.8", features = ["colored", "syslog-4"] }

# Commandline Parsing
    # Framework
    clap = { version = "2.33.0", features = ["wrap_help"] }

# Serialization
    # Framework
    serde = { version = "1.0.90", features = ["derive"] }

    # Formats
    serde_json = "1.0.39"
    serde_yaml = "0.8.8"

Running rls --cli after a cargo clean in a completely fresh project created with cargo new and the above Cargo.toml will go through building the project until it reaches syslog and then fail with an error message ( but the VSCode plugin tends to say that it fails on the clap package when running on non-clean project ).

Error Message ( including backtrace ):

{"message":"src/librustc/ty/context.rs:541: node_type: no type for node `expr <Self>::SC_NEGATE_REQS (id=50331)`","code":null,"level":"error: internal compiler error","spans":[],"children":[],"rendered":"error: internal compiler error: src/librustc/ty/context.rs:541: node_type: no type for node `expr <Self>::SC_NEGATE_REQS (id=50331)`\n\n"}
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:620:9
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
   1: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:70
   2: std::panicking::default_hook::{{closure}}
             at src/libstd/sys_common/backtrace.rs:58
             at src/libstd/panicking.rs:200
   3: std::panicking::default_hook
             at src/libstd/panicking.rs:215
   4: rustc::util::common::panic_hook
   5: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:482
   6: std::panicking::begin_panic
   7: rustc_errors::Handler::bug
   8: rustc::util::bug::opt_span_bug_fmt::{{closure}}
   9: rustc::ty::context::tls::with_opt::{{closure}}
  10: rustc::ty::context::tls::with_context_opt
  11: rustc::ty::context::tls::with_opt
  12: rustc::util::bug::opt_span_bug_fmt
  13: rustc::util::bug::bug_fmt
  14: rustc::ty::context::TypeckTables::node_type::{{closure}}
  15: rustc::ty::context::TypeckTables::expr_ty_adjusted
  16: rustc_save_analysis::SaveContext::get_expr_data
  17: <rustc_save_analysis::dump_visitor::DumpVisitor<'l, 'tcx, 'll, O> as syntax::visit::Visitor<'l>>::visit_expr
  18: <rustc_save_analysis::dump_visitor::DumpVisitor<'l, 'tcx, 'll, O>>::process_assoc_const
  19: <rustc_save_analysis::dump_visitor::DumpVisitor<'l, 'tcx, 'll, O> as syntax::visit::Visitor<'l>>::visit_item
  20: <rustc_save_analysis::dump_visitor::DumpVisitor<'l, 'tcx, 'll, O>>::process_method
  21: <rustc_save_analysis::dump_visitor::DumpVisitor<'l, 'tcx, 'll, O> as syntax::visit::Visitor<'l>>::visit_item
  22: <rustc_save_analysis::dump_visitor::DumpVisitor<'l, 'tcx, 'll, O> as syntax::visit::Visitor<'l>>::visit_item
  23: <rustc_save_analysis::dump_visitor::DumpVisitor<'l, 'tcx, 'll, O> as syntax::visit::Visitor<'l>>::visit_item
  24: <rustc_save_analysis::dump_visitor::DumpVisitor<'l, 'tcx, 'll, O> as syntax::visit::Visitor<'l>>::visit_mod
  25: <rustc_save_analysis::DumpHandler<'a> as rustc_save_analysis::SaveHandler>::save
  26: rustc::dep_graph::graph::DepGraph::with_ignore
  27: rustc_driver::enable_save_analysis::{{closure}}::{{closure}}
  28: rustc_driver::enable_save_analysis::{{closure}}
  29: rustc::dep_graph::graph::DepGraph::with_ignore
  30: rustc_driver::driver::compile_input::{{closure}}
  31: <std::thread::local::LocalKey<T>>::with
  32: rustc::ty::context::TyCtxt::create_and_enter
  33: rustc_driver::driver::compile_input
  34: rustc_driver::run_compiler_with_pool
  35: <scoped_tls::ScopedKey<T>>::set
  36: rustc_driver::run_compiler
  37: <scoped_tls::ScopedKey<T>>::set
query stack during panic:
end of query stack
{"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}

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

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.34.1 (fc50f328b 2019-04-24) running on x86_64-unknown-linux-gnu

note: compiler flags: -C debuginfo=2 --crate-type lib

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

{"jsonrpc":"2.0","method":"window/progress","params":{"done":true,"id":"progress_1","title":"Building"}}
{"jsonrpc":"2.0","method":"window/progress","params":{"id":"progress_0","title":"Indexing"}}
{"jsonrpc":"2.0","method":"textDocument/publishDiagnostics","params":{"diagnostics":[{"message":"build failed","range":{"end":{"character":0,"line":9999},"start":{"character":0,"line":0}},"severity":1}],"uri":"file:///home/zicklag/tmp/rls-demonstration/Cargo.toml"}}
{"jsonrpc":"2.0","method":"window/progress","params":{"done":true,"id":"progress_0","title":"Indexing"}}

My project compiles completely fine when running cargo run, it is just the language server that fails.

rustc --version --verbose:

rustc 1.34.1 (fc50f328b 2019-04-24)
binary: rustc
commit-hash: fc50f328b0353b285421b8ff5d4100966387a997
commit-date: 2019-04-24
host: x86_64-unknown-linux-gnu
release: 1.34.1
LLVM version: 8.0

[jonas-schievink]

Duplicate of #59134