no ImplicitCtxt stored in tls when using -Zthreads=8

[MartinquaXD]

Compiler panicked when compiling big project with parallelization feature enabled.

Meta

rustc --version --verbose:

cargo 1.75.0-nightly (7046d992f 2023-11-08)

Error output

thread 'rustc' panicked at /rustc/0f44eb32f1123ac93ab404d74c295263ce468343/compiler/rustc_middle/src/ty/context/tls.rs:111:50:
no ImplicitCtxt stored in tls
<Backtrace>
note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked -Z threads=8

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

query stack during panic:
end of query stack
Rayon: detected unexpected panic; aborting
error: could not compile `rustix` (lib)

Caused by:
  process didn't exit successfully: `/Users/martin/.rustup/toolchains/nightly-aarch64-apple-darwin/bin/rustc --crate-name rustix --edition=2021 /Users/martin/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustix-0.38.7/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=203 --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="default"' --cfg 'feature="fs"' --cfg 'feature="std"' --cfg 'feature="termios"' --cfg 'feature="use-libc-auxv"' -C metadata=286b6850d203df26 -C extra-filename=-286b6850d203df26 --out-dir /Users/martin/work/backend/side/target/debug/deps -L dependency=/Users/martin/work/backend/side/target/debug/deps --extern bitflags=/Users/martin/work/backend/side/target/debug/deps/libbitflags-c2a1d62f0fb6eb0c.rmeta --extern libc_errno=/Users/martin/work/backend/side/target/debug/deps/liberrno-5081d544525172dd.rmeta --extern libc=/Users/martin/work/backend/side/target/debug/deps/liblibc-1ba6836e8f7fa714.rmeta --cap-lints allow -Z threads=8 --cfg static_assertions --cfg libc --cfg apple --cfg bsd` (signal: 6, SIGABRT: process abort signal)
warning: build failed, waiting for other jobs to finish...

Backtrace

stack backtrace:
   0:        0x1035612b8 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h052d4a6449303d0c
   1:        0x1035a3268 - core::fmt::write::hd7376fa11f842969
   2:        0x1035579ec - std::io::Write::write_fmt::h8962cd07816e935b
   3:        0x1035610f4 - std::sys_common::backtrace::print::h97fb0a8a4077c481
   4:        0x103563af4 - std::panicking::default_hook::{{closure}}::h3b4672ac61ca5355
   5:        0x10356383c - std::panicking::default_hook::h609e6a125a90b4e7
   Compiling flate2 v1.0.26
   6:        0x10c96abb8 - <alloc[e142c9bf9c63cfc4]::boxed::Box<rustc_driver_impl[1a98898d3f3a38ed]::install_ice_hook::{closure#0}> as core[4e0a19b8f4e7b450]::ops::function::Fn<(&dyn for<'a, 'b> core[4e0a19b8f4e7b450]::ops::function::Fn<(&'a core[4e0a19b8f4e7b450]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[4e0a19b8f4e7b450]::marker::Send + core[4e0a19b8f4e7b450]::marker::Sync, &core[4e0a19b8f4e7b450]::panic::panic_info::PanicInfo)>>::call
   7:        0x10356416c - std::panicking::rust_panic_with_hook::h9625542414b348eb
   8:        0x103563f34 - std::panicking::begin_panic_handler::{{closure}}::hb4fa343c314105dc
   9:        0x103561720 - std::sys_common::backtrace::__rust_end_short_backtrace::he263cec7b035e782
  10:        0x103563cd0 - _rust_begin_unwind
  11:        0x1035bd0b8 - core::panicking::panic_fmt::h624e311b541e9a0d
  12:        0x1035bd084 - core::option::expect_failed::h3320581af4499170
  13:        0x10c91a0d0 - rustc_interface[6fd153b9b61224af]::util::run_in_thread_pool_with_globals::<rustc_interface[6fd153b9b61224af]::interface::run_compiler<core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>, rustc_driver_impl[1a98898d3f3a38ed]::run_compiler::{closure#1}>::{closure#0}, core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>>::{closure#2}
  14:        0x1106774fc - <rayon_core[cbb553a4c613b58b]::sleep::Sleep>::sleep
  15:        0x110676a04 - <rayon_core[cbb553a4c613b58b]::registry::WorkerThread>::wait_until_cold
  16:        0x10c06a22c - <rayon_core[cbb553a4c613b58b]::registry::ThreadBuilder>::run
  17:        0x10c971610 - rustc_span[7d3d88934d9d268]::set_session_globals_then::<(), rustc_interface[6fd153b9b61224af]::util::run_in_thread_pool_with_globals<rustc_interface[6fd153b9b61224af]::interface::run_compiler<core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>, rustc_driver_impl[1a98898d3f3a38ed]::run_compiler::{closure#1}>::{closure#0}, core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>>::{closure#3}::{closure#0}::{closure#0}::{closure#0}>
  18:        0x10c91a44c - <<crossbeam_utils[6313ccede057e440]::thread::ScopedThreadBuilder>::spawn<<rayon_core[cbb553a4c613b58b]::ThreadPoolBuilder>::build_scoped<rustc_interface[6fd153b9b61224af]::util::run_in_thread_pool_with_globals<rustc_interface[6fd153b9b61224af]::interface::run_compiler<core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>, rustc_driver_impl[1a98898d3f3a38ed]::run_compiler::{closure#1}>::{closure#0}, core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>>::{closure#3}::{closure#0}::{closure#0}, rustc_interface[6fd153b9b61224af]::util::run_in_thread_pool_with_globals<rustc_interface[6fd153b9b61224af]::interface::run_compiler<core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>, rustc_driver_impl[1a98898d3f3a38ed]::run_compiler::{closure#1}>::{closure#0}, core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>>::{closure#3}::{closure#0}::{closure#1}, core[4e0a19b8f4e7b450]::result::Result<(), rustc_span[7d3d88934d9d268]::ErrorGuaranteed>>::{closure#0}::{closure#0}::{closure#0}, ()>::{closure#0} as core[4e0a19b8f4e7b450]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  19:        0x10c978478 - std[f37625d93cba7df1]::sys_common::backtrace::__rust_begin_short_backtrace::<alloc[e142c9bf9c63cfc4]::boxed::Box<dyn core[4e0a19b8f4e7b450]::ops::function::FnOnce<(), Output = ()> + core[4e0a19b8f4e7b450]::marker::Send>, ()>
  20:        0x10c94c5f0 - <<std[f37625d93cba7df1]::thread::Builder>::spawn_unchecked_<alloc[e142c9bf9c63cfc4]::boxed::Box<dyn core[4e0a19b8f4e7b450]::ops::function::FnOnce<(), Output = ()> + core[4e0a19b8f4e7b450]::marker::Send>, ()>::{closure#1} as core[4e0a19b8f4e7b450]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  21:        0x10356c368 - std::sys::unix::thread::Thread::new::thread_start::h6af77cae4d08b8df
  22:        0x18f69ffa8 - __pthread_joiner_wake

[aumetra]

Seems to be a duplicate of #111522?

[MartinquaXD]

Yes, appears to be a duplicate. Sorry for that.
The back trace in the other issue is quite a bit more verbose but seems to indicate a panic in the same function. This issue can be closed then. 👌

[petrochenkov]

Duplicate of #111522.