Compiler panics on latest RLS when compiling crates that depend on bitflags 1.0.5

[Ten0]

Follows rust-lang/rls#1449.
EDIT: New elements there.

I'm trying to develop a crate which ends up using nix as a dependency.
I'm getting the following error through RLS :
(stable-x86_64-unknown-linux-gnu unchanged - rustc 1.34.1 (fc50f32 2019-04-24), ArchLinux 5.0.10-arch1-1-ARCH)

Could not compile `nix`.
process didn't exit successfully: `/home/xxx/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rls --crate-name nix /home/xxx/.cargo/registry/src/github.lhy31512.workers.dev-1ecc6299db9ec823/nix-0.13.0/src/lib.rs --color never --crate-type lib --emit=dep-info,metadata -C debuginfo=2 -C metadata=e41c62fd44c3a368 -C extra-filename=-e41c62fd44c3a368 --out-dir /home/xxx/bug/target/rls/debug/deps -L dependency=/home/xxx/bug/target/rls/debug/deps --extern bitflags=/home/xxx/bug/target/rls/debug/deps/libbitflags-162b4a56bd08b901.rmeta --extern cfg_if=/home/xxx/bug/target/rls/debug/deps/libcfg_if-dab04317bb5fc6db.rmeta --extern libc=/home/xxx/bug/target/rls/debug/deps/liblibc-98ec97d48b6e5b85.rmeta --extern void=/home/xxx/bug/target/rls/debug/deps/libvoid-e59ad8b8a3ae09b4.rmeta --cap-lints allow --error-format=json --sysroot /home/xxx/.rustup/toolchains/stable-x86_64-unknown-linux-gnu` (exit code: 101)

Using "rust-client.logToFile": true, to get the log, I get this additional information:

{"message":"src/librustc/ty/context.rs:541: node_type: no type for node `expr <Self>::AT_SYMLINK_NOFOLLOW (id=43804)`","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>::AT_SYMLINK_NOFOLLOW (id=43804)`\n\n"}
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:620:9
note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
{"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

This error does not happen when compiling through cargo check, cargo build, cargo build --release, cargo doc, etc, only through RLS, but I suppose the compiler is not supposed to crash anyway.

The following minimal project triggers the bug when opening VSCode with the RLS extension installed :

Cargo.toml:

[package]
name = "bug"
version = "1.0.0"
authors = ["Le me"]
edition = "2018"
publish = false

[dependencies]
nix = "0.13.0"

src/main.rs:

fn main() {
	let hw = "HelloWorld";
	println!("{}", hw);
}

[jonas-schievink]

To reproduce, run cargo +nightly rustc --lib -- -Zsave-analysis on a fresh checkout (nix-rust/nix@71b35a0) of nix:

error: the item `libc` is imported redundantly
  --> src/mount.rs:64:9
   |
2  | use libc;
   |     ---- the item `libc` is already imported here
...
64 |     use libc;
   |         ^^^^
   |
note: lint level defined here
  --> src/lib.rs:13:9
   |
13 | #![deny(unused)]
   |         ^^^^^^
   = note: #[deny(unused_imports)] implied by #[deny(unused)]

error: internal compiler error: src/librustc/ty/context.rs:562: node_type: no type for node `expr <Self>::AT_SYMLINK_NOFOLLOW (id=45856)`

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:643:9
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:71
   2: std::panicking::default_hook::{{closure}}
             at src/libstd/sys_common/backtrace.rs:59
             at src/libstd/panicking.rs:197
   3: std::panicking::default_hook
             at src/libstd/panicking.rs:211
   4: rustc::util::common::panic_hook
   5: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:478
   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<O> as syntax::visit::Visitor>::visit_expr
  18: rustc_save_analysis::dump_visitor::DumpVisitor<O>::process_assoc_const
  19: <rustc_save_analysis::dump_visitor::DumpVisitor<O> as syntax::visit::Visitor>::visit_item
  20: rustc_save_analysis::dump_visitor::DumpVisitor<O>::process_method
  21: <rustc_save_analysis::dump_visitor::DumpVisitor<O> as syntax::visit::Visitor>::visit_item
  22: <rustc_save_analysis::dump_visitor::DumpVisitor<O> as syntax::visit::Visitor>::visit_item
  23: <rustc_save_analysis::dump_visitor::DumpVisitor<O> as syntax::visit::Visitor>::visit_mod
  24: <rustc_save_analysis::DumpHandler as rustc_save_analysis::SaveHandler>::save
  25: rustc::dep_graph::graph::DepGraph::with_ignore
  26: rustc_driver::run_compiler::{{closure}}::{{closure}}::{{closure}}
  27: rustc::util::common::time
  28: rustc::ty::context::tls::enter_global
  29: rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}
  30: rustc_interface::passes::create_global_ctxt::{{closure}}
  31: rustc_interface::interface::run_compiler_in_existing_thread_pool
  32: std::thread::local::LocalKey<T>::with
  33: scoped_tls::ScopedKey<T>::set
  34: syntax::with_globals
query stack during panic:
end of query stack
error: aborting due to 2 previous errors

[hcrohland]

I have the same error. rustc crashes when compiling diesel from rls.
Normal compile via 'cargo build' succeeds.

[jonas-schievink]

Duplicate of #59134