Rust-GPU / Rust-GPU/rust-gpu

async functions cause ICE

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bug
Dominant language
Rust
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Description

Expected Behaviour

Compile TIme Error Message

Example & Steps To Reproduce

Lib.rs file to being compiled by spirv_builder

#![no_std]

async fn testing(){}
#[spirv_std::spirv(compute(threads(1)))]
pub fn main() {
    let temp = testing();
}

System Info

Cargo.toml

[package]
name = "rust_gpu_build"
version = "0.1.0"
edition = "2021"

[dependencies]
libm = "=0.2.11"
spirv-builder = { git = "https://github.com/Rust-GPU/rust-gpu.git"}


[profile.release.build-override]
opt-level = 3
codegen-units = 1
[profile.dev.build-override]
opt-level = 3

rust-toolchain.toml

[toolchain]
channel = "nightly-2025-11-13"
components = ["rust-src", "rustc-dev", "llvm-tools"]

Backtrace

note: compiler flags: --crate-type dylib -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 -C strip=debuginfo -Z unstable-options -Z codegen-backend=/home/user/Documents/vscode/test/rust_gpu/rust_gpu_build/target/debug/librustc_codegen_spirv.so -Z binary-dep-depinfo -C symbol-mangling-version=v0 -Z crate-attr=feature(register_tool) -Z crate-attr=register_tool(rust_gpu) -C overflow-checks=off -C debug-assertions=off -Z inline-mir=off -Z mir-enable-passes=-GVN -Z share-generics=off
Backtrace 

thread 'rustc' panicked at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:694:17:
Box<dyn Any>
stack backtrace:
   0:     0x72d6bda4062b - std::backtrace::Backtrace::create::hec63f2c97908c8bb
   1:     0x72d6bda40575 - std::backtrace::Backtrace::force_capture::hdeafaeab7a30ed19
   2:     0x72d6bca325d2 - std[c8d4bb381711e68]::panicking::update_hook::<alloc[2508525745eabac6]::boxed::Box<rustc_driver_impl[3c4699642b322592]::install_ice_hook::{closure#1}>>::{closure#0}
   3:     0x72d6bca31e61 - std[c8d4bb381711e68]::panicking::update_hook::<alloc[2508525745eabac6]::boxed::Box<rustc_driver_impl[3c4699642b322592]::install_ice_hook::{closure#1}>>::{closure#0}
   4:     0x72d6bda4157b - std::panicking::panic_with_hook::he0d479546e4ce5b9
   5:     0x72d6bca6e3d1 - std[c8d4bb381711e68]::panicking::begin_panic::<rustc_errors[4a6b3a26dff7b902]::ExplicitBug>::{closure#0}
   6:     0x72d6bca60876 - std[c8d4bb381711e68]::sys::backtrace::__rust_end_short_backtrace::<std[c8d4bb381711e68]::panicking::begin_panic<rustc_errors[4a6b3a26dff7b902]::ExplicitBug>::{closure#0}, !>
   7:     0x72d6bca5dfc9 - std[c8d4bb381711e68]::panicking::begin_panic::<rustc_errors[4a6b3a26dff7b902]::ExplicitBug>
   8:     0x72d6bca8cc01 - <rustc_errors[4a6b3a26dff7b902]::diagnostic::BugAbort as rustc_errors[4a6b3a26dff7b902]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
   9:     0x72d6bcff43cc - <rustc_errors[4a6b3a26dff7b902]::DiagCtxtHandle>::span_bug::<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span, alloc[2508525745eabac6]::string::String>
  10:     0x72d6bd017907 - rustc_middle[8d85ffaee97d78d]::util::bug::opt_span_bug_fmt::<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span>::{closure#0}
  11:     0x72d6bd017aaa - rustc_middle[8d85ffaee97d78d]::ty::context::tls::with_opt::<rustc_middle[8d85ffaee97d78d]::util::bug::opt_span_bug_fmt<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  12:     0x72d6bd0084bb - rustc_middle[8d85ffaee97d78d]::ty::context::tls::with_context_opt::<rustc_middle[8d85ffaee97d78d]::ty::context::tls::with_opt<rustc_middle[8d85ffaee97d78d]::util::bug::opt_span_bug_fmt<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  13:     0x72d6bb2e1367 - rustc_middle[8d85ffaee97d78d]::util::bug::span_bug_fmt::<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span>
  14:     0x72d6aa9bc5d7 - rustc_codegen_spirv::abi::trans_struct_or_union::ha96f07edea0769ca
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:694:17
  15:     0x72d6aa9b7baf - rustc_codegen_spirv::abi::trans_aggregate::hf4fbb1662fb7fb41
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:620:14
  16:     0x72d6aa99211d - <rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty> as rustc_codegen_spirv::abi::ConvSpirvType>::spirv_type::h8234b12324b82a25
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:398:49
  17:     0x72d6aaa5f131 - <rustc_codegen_spirv::abi::PointeeTy as rustc_codegen_spirv::abi::ConvSpirvType>::spirv_type::h3830201235ced2fe
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:238:37
  18:     0x72d6aa9b773e - rustc_codegen_spirv::abi::trans_scalar::h805b7b315b296307
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:463:42
  19:     0x72d6aa991dc9 - <rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty> as rustc_codegen_spirv::abi::ConvSpirvType>::spirv_type::h8234b12324b82a25
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:317:44
  20:     0x72d6aa990e4d - <rustc_target::callconv::FnAbi<rustc_middle::ty::Ty> as rustc_codegen_spirv::abi::ConvSpirvType>::spirv_type::h9f3db060cd539813
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:264:51
  21:     0x72d6aab83383 - rustc_codegen_spirv::codegen_cx::declare::<impl rustc_codegen_spirv::codegen_cx::CodegenCx>::declare_fn_ext::heb39882c95280c42
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/codegen_cx/declare.rs:75:36
  22:     0x72d6aab80db0 - rustc_codegen_spirv::codegen_cx::declare::<impl rustc_codegen_spirv::maybe_pqp_cg_ssa::traits::declare::PreDefineCodegenMethods for rustc_codegen_spirv::codegen_cx::CodegenCx>::predefine_fn::ha68ce7ccd72c4b18
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/codegen_cx/declare.rs:364:29
  23:     0x72d6aaf83089 - <rustc_middle::mir::mono::MonoItem as rustc_codegen_spirv::maybe_pqp_cg_ssa::mono_item::MonoItemExt>::predefine::h69e12c3d6246e1d5
                               at /home/user/Documents/vscode/test/rust_gpu/rust_gpu_build/target/debug/build/rustc_codegen_spirv-7f7173e9ec8af35a/out/pqp_cg_ssa/src/mono_item.rs:80:24
  24:     0x72d6ab021bf5 - <rustc_codegen_spirv::SpirvCodegenBackend as rustc_codegen_spirv::maybe_pqp_cg_ssa::traits::backend::ExtraBackendMethods>::compile_codegen_unit::{{closure}}::h410f004d7d3b2843
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/lib.rs:460:27
  25:     0x72d6ab0210f7 - <rustc_codegen_spirv::SpirvCodegenBackend as rustc_codegen_spirv::maybe_pqp_cg_ssa::traits::backend::ExtraBackendMethods>::compile_codegen_unit::h6dc8143f98460e2f
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/lib.rs:489:36
  26:     0x72d6aabb0991 - rustc_codegen_spirv::maybe_pqp_cg_ssa::base::codegen_crate::he1242eca30e59433
                               at /home/user/Documents/vscode/test/rust_gpu/rust_gpu_build/target/debug/build/rustc_codegen_spirv-7f7173e9ec8af35a/out/pqp_cg_ssa/src/base.rs:808:42
  27:     0x72d6ab01c93a - <rustc_codegen_spirv::SpirvCodegenBackend as rustc_codegen_spirv::maybe_pqp_cg_ssa::traits::backend::CodegenBackend>::codegen_crate::h669390948f05c4b9
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/lib.rs:240:18
  28:     0x72d6bf4c6f8d - <rustc_interface[23742b77bf084c1c]::queries::Linker>::codegen_and_build_linker
  29:     0x72d6bf4c3b4d - <rustc_interface[23742b77bf084c1c]::passes::create_and_enter_global_ctxt<core[9a42bb1793c5c9a8]::option::Option<rustc_interface[23742b77bf084c1c]::queries::Linker>, rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[9a42bb1793c5c9a8]::ops::function::FnOnce<(&rustc_session[158844ada7f0f676]::session::Session, rustc_middle[8d85ffaee97d78d]::ty::context::CurrentGcx, alloc[2508525745eabac6]::sync::Arc<rustc_data_structures[ae499ee93fe3a250]::jobserver::Proxy>, &std[c8d4bb381711e68]::sync::once_lock::OnceLock<rustc_middle[8d85ffaee97d78d]::ty::context::GlobalCtxt>, &rustc_data_structures[ae499ee93fe3a250]::sync::worker_local::WorkerLocal<rustc_middle[8d85ffaee97d78d]::arena::Arena>, &rustc_data_structures[ae499ee93fe3a250]::sync::worker_local::WorkerLocal<rustc_hir[3a966f3954156600]::Arena>, rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  30:     0x72d6bf3223a9 - rustc_interface[23742b77bf084c1c]::interface::run_compiler::<(), rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}>::{closure#1}
  31:     0x72d6bf34cf7b - std[c8d4bb381711e68]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[23742b77bf084c1c]::util::run_in_thread_with_globals<rustc_interface[23742b77bf084c1c]::util::run_in_thread_pool_with_globals<rustc_interface[23742b77bf084c1c]::interface::run_compiler<(), rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  32:     0x72d6bf34cc54 - <<std[c8d4bb381711e68]::thread::Builder>::spawn_unchecked_<rustc_interface[23742b77bf084c1c]::util::run_in_thread_with_globals<rustc_interface[23742b77bf084c1c]::util::run_in_thread_pool_with_globals<rustc_interface[23742b77bf084c1c]::interface::run_compiler<(), rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[9a42bb1793c5c9a8]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  33:     0x72d6bf350faf - std::sys::thread::unix::Thread::new::thread_start::hfb7aed7a74f6cac0
  34:     0x72d6b8a9a97a - start_thread
  35:     0x72d6b8b22d2c - __clone3
  36:                0x0 - <unknown>


rustc version: 1.93.0-nightly (01867557c 2025-11-12)
platform: x86_64-unknown-linux-gnu

query stack during panic:
end of query stack
thread 'rustc' panicked at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:694:17:
Box<dyn Any>
stack backtrace:
   0:     0x72d6bda4062b - std::backtrace::Backtrace::create::hec63f2c97908c8bb
   1:     0x72d6bda40575 - std::backtrace::Backtrace::force_capture::hdeafaeab7a30ed19
   2:     0x72d6bca325d2 - std[c8d4bb381711e68]::panicking::update_hook::<alloc[2508525745eabac6]::boxed::Box<rustc_driver_impl[3c4699642b322592]::install_ice_hook::{closure#1}>>::{closure#0}
   3:     0x72d6bda4157b - std::panicking::panic_with_hook::he0d479546e4ce5b9
   4:     0x72d6bca6e3d1 - std[c8d4bb381711e68]::panicking::begin_panic::<rustc_errors[4a6b3a26dff7b902]::ExplicitBug>::{closure#0}
   5:     0x72d6bca60876 - std[c8d4bb381711e68]::sys::backtrace::__rust_end_short_backtrace::<std[c8d4bb381711e68]::panicking::begin_panic<rustc_errors[4a6b3a26dff7b902]::ExplicitBug>::{closure#0}, !>
   6:     0x72d6bca5dfc9 - std[c8d4bb381711e68]::panicking::begin_panic::<rustc_errors[4a6b3a26dff7b902]::ExplicitBug>
   7:     0x72d6bca8cc01 - <rustc_errors[4a6b3a26dff7b902]::diagnostic::BugAbort as rustc_errors[4a6b3a26dff7b902]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
   8:     0x72d6bcff43cc - <rustc_errors[4a6b3a26dff7b902]::DiagCtxtHandle>::span_bug::<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span, alloc[2508525745eabac6]::string::String>
   9:     0x72d6bd017907 - rustc_middle[8d85ffaee97d78d]::util::bug::opt_span_bug_fmt::<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span>::{closure#0}
  10:     0x72d6bd017aaa - rustc_middle[8d85ffaee97d78d]::ty::context::tls::with_opt::<rustc_middle[8d85ffaee97d78d]::util::bug::opt_span_bug_fmt<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  11:     0x72d6bd0084bb - rustc_middle[8d85ffaee97d78d]::ty::context::tls::with_context_opt::<rustc_middle[8d85ffaee97d78d]::ty::context::tls::with_opt<rustc_middle[8d85ffaee97d78d]::util::bug::opt_span_bug_fmt<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  12:     0x72d6bb2e1367 - rustc_middle[8d85ffaee97d78d]::util::bug::span_bug_fmt::<rustc_span[5a5bd85de0de1f2b]::span_encoding::Span>
  13:     0x72d6aa9bc5d7 - rustc_codegen_spirv::abi::trans_struct_or_union::ha96f07edea0769ca
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:694:17
  14:     0x72d6aa9b7baf - rustc_codegen_spirv::abi::trans_aggregate::hf4fbb1662fb7fb41
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:620:14
  15:     0x72d6aa99211d - <rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty> as rustc_codegen_spirv::abi::ConvSpirvType>::spirv_type::h8234b12324b82a25
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:398:49
  16:     0x72d6aaa5f131 - <rustc_codegen_spirv::abi::PointeeTy as rustc_codegen_spirv::abi::ConvSpirvType>::spirv_type::h3830201235ced2fe
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:238:37
  17:     0x72d6aa9b773e - rustc_codegen_spirv::abi::trans_scalar::h805b7b315b296307
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:463:42
  18:     0x72d6aa991dc9 - <rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty> as rustc_codegen_spirv::abi::ConvSpirvType>::spirv_type::h8234b12324b82a25
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:317:44
  19:     0x72d6aa990e4d - <rustc_target::callconv::FnAbi<rustc_middle::ty::Ty> as rustc_codegen_spirv::abi::ConvSpirvType>::spirv_type::h9f3db060cd539813
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/abi.rs:264:51
  20:     0x72d6aab83383 - rustc_codegen_spirv::codegen_cx::declare::<impl rustc_codegen_spirv::codegen_cx::CodegenCx>::declare_fn_ext::heb39882c95280c42
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/codegen_cx/declare.rs:75:36
  21:     0x72d6aab80db0 - rustc_codegen_spirv::codegen_cx::declare::<impl rustc_codegen_spirv::maybe_pqp_cg_ssa::traits::declare::PreDefineCodegenMethods for rustc_codegen_spirv::codegen_cx::CodegenCx>::predefine_fn::ha68ce7ccd72c4b18
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/codegen_cx/declare.rs:364:29
  22:     0x72d6aaf83089 - <rustc_middle::mir::mono::MonoItem as rustc_codegen_spirv::maybe_pqp_cg_ssa::mono_item::MonoItemExt>::predefine::h69e12c3d6246e1d5
                               at /home/user/Documents/vscode/test/rust_gpu/rust_gpu_build/target/debug/build/rustc_codegen_spirv-7f7173e9ec8af35a/out/pqp_cg_ssa/src/mono_item.rs:80:24
  23:     0x72d6ab021bf5 - <rustc_codegen_spirv::SpirvCodegenBackend as rustc_codegen_spirv::maybe_pqp_cg_ssa::traits::backend::ExtraBackendMethods>::compile_codegen_unit::{{closure}}::h410f004d7d3b2843
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/lib.rs:460:27
  24:     0x72d6ab0210f7 - <rustc_codegen_spirv::SpirvCodegenBackend as rustc_codegen_spirv::maybe_pqp_cg_ssa::traits::backend::ExtraBackendMethods>::compile_codegen_unit::h6dc8143f98460e2f
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/lib.rs:489:36
  25:     0x72d6aabb0991 - rustc_codegen_spirv::maybe_pqp_cg_ssa::base::codegen_crate::he1242eca30e59433
                               at /home/user/Documents/vscode/test/rust_gpu/rust_gpu_build/target/debug/build/rustc_codegen_spirv-7f7173e9ec8af35a/out/pqp_cg_ssa/src/base.rs:808:42
  26:     0x72d6ab01c93a - <rustc_codegen_spirv::SpirvCodegenBackend as rustc_codegen_spirv::maybe_pqp_cg_ssa::traits::backend::CodegenBackend>::codegen_crate::h669390948f05c4b9
                               at /home/user/.cargo/git/checkouts/rust-gpu-d06d15e2ba0f0ae2/3089687/crates/rustc_codegen_spirv/src/lib.rs:240:18
  27:     0x72d6bf4c6f8d - <rustc_interface[23742b77bf084c1c]::queries::Linker>::codegen_and_build_linker
  28:     0x72d6bf4c3b4d - <rustc_interface[23742b77bf084c1c]::passes::create_and_enter_global_ctxt<core[9a42bb1793c5c9a8]::option::Option<rustc_interface[23742b77bf084c1c]::queries::Linker>, rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[9a42bb1793c5c9a8]::ops::function::FnOnce<(&rustc_session[158844ada7f0f676]::session::Session, rustc_middle[8d85ffaee97d78d]::ty::context::CurrentGcx, alloc[2508525745eabac6]::sync::Arc<rustc_data_structures[ae499ee93fe3a250]::jobserver::Proxy>, &std[c8d4bb381711e68]::sync::once_lock::OnceLock<rustc_middle[8d85ffaee97d78d]::ty::context::GlobalCtxt>, &rustc_data_structures[ae499ee93fe3a250]::sync::worker_local::WorkerLocal<rustc_middle[8d85ffaee97d78d]::arena::Arena>, &rustc_data_structures[ae499ee93fe3a250]::sync::worker_local::WorkerLocal<rustc_hir[3a966f3954156600]::Arena>, rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  29:     0x72d6bf3223a9 - rustc_interface[23742b77bf084c1c]::interface::run_compiler::<(), rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}>::{closure#1}
  30:     0x72d6bf34cf7b - std[c8d4bb381711e68]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[23742b77bf084c1c]::util::run_in_thread_with_globals<rustc_interface[23742b77bf084c1c]::util::run_in_thread_pool_with_globals<rustc_interface[23742b77bf084c1c]::interface::run_compiler<(), rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  31:     0x72d6bf34cc54 - <<std[c8d4bb381711e68]::thread::Builder>::spawn_unchecked_<rustc_interface[23742b77bf084c1c]::util::run_in_thread_with_globals<rustc_interface[23742b77bf084c1c]::util::run_in_thread_pool_with_globals<rustc_interface[23742b77bf084c1c]::interface::run_compiler<(), rustc_driver_impl[3c4699642b322592]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[9a42bb1793c5c9a8]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  32:     0x72d6bf350faf - std::sys::thread::unix::Thread::new::thread_start::hfb7aed7a74f6cac0
  33:     0x72d6b8a9a97a - start_thread
  34:     0x72d6b8b22d2c - __clone3
  35:                0x0 - <unknown>


query stack during panic:
end of query stack

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Research direction

Reproduce the async-function example with the nightly toolchain and spirv-builder, then start in crates/rustc_codegen_spirv/src/abi.rs at line 694 and follow the call path through codegen_cx/declare.rs. Done means the input produces a compile-time diagnostic instead of an internal compiler error; add or update a regression test if the existing test layout identifies one.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
48/100

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