Closed
Description
auto-reduced (treereduce-rust):
#![feature(async_closure)]
fn main() {
let a = async move |a: i32, b: i32| {};
let b = |a: i32, b: i32| {};
a(1, 2);
b(1, 2);
}
original code
original:
//@ compile-flags: --cfg something
//@ edition:2018
#![feature(async_closure)]
#![deny(unused_variables)]
async fn foo_async(
a: i32,
//~^ ERROR unused variable: `a`
#[allow(unused_variables)] b: i32,
) {}
fn foo(
#[allow(unused_variables)] a: i32,
b: i32,
//~^ ERROR unused variable: `b`
) {}
struct RefStruct {}
impl RefStruct {
async fn bar_async(
&self,
a: i32,
//~^ ERROR unused variable: `a`
#[allow(unused_variables)] b: i32,
) {}
fn bar(
&self,
#[allow(unused_variables)] a: i32,
b: i32,
//~^ ERROR unused variable: `b`
) {}
fn issue_64682_associated_fn(
#[allow(unused_variables)] a: i32,
b: i32,
//~^ ERROR unused variable: `b`
) {}
}
trait RefTrait {
fn bar(
&self,
#[allow(unused_variables)] a: i32,
b: i32,
//~^ ERROR unused variable: `b`
) {}
fn issue_64682_associated_fn(
#[allow(unused_variables)] a: i32,
b: i32,
//~^ ERROR unused variable: `b`
) {}
}
impl RefTrait for RefStruct {
fn bar(
&self,
#[allow(unused_variables)] a: i32,
b: i32,
//~^ ERROR unused variable: `b`
) {}
fn issue_64682_associated_fn(
#[allow(unused_variables)] a: i32,
b: i32,
//~^ ERROR unused variable: `b`
) {}
}
fn main() {
let _: fn(_, _) = foo;
let a = async move |
a: i32,
//~^ ERROR unused variable: `a`
#[allow(unused_variables)] b: i32,
| {};
let b = |
#[allow(unused_variables)] a: i32,
b: i32,
//~^ ERROR unused variable: `b`
| {};
a(1, 2);
b(1, 2);
}Version information
rustc 1.79.0-nightly (3cdcdaf31 2024-03-18)
binary: rustc
commit-hash: 3cdcdaf31b45f8045164aae9604573d23091970b
commit-date: 2024-03-18
host: x86_64-unknown-linux-gnu
release: 1.79.0-nightly
LLVM version: 18.1.2
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc --edition=2021 --cap-lints=warn -Zsanitizer=cfi -Ccodegen-units=1 -Clto
Program output
warning: unused variable: `a`
--> /tmp/icemaker_global_tempdir.Zzjtx1Evw50c/rustc_testrunner_tmpdir_reporting.EkN8stMQHPaP/mvce.rs:4:25
|
4 | let a = async move |a: i32, b: i32| {};
| ^ help: if this is intentional, prefix it with an underscore: `_a`
|
= note: `#[warn(unused_variables)]` on by default
warning: unused variable: `b`
--> /tmp/icemaker_global_tempdir.Zzjtx1Evw50c/rustc_testrunner_tmpdir_reporting.EkN8stMQHPaP/mvce.rs:4:33
|
4 | let a = async move |a: i32, b: i32| {};
| ^ help: if this is intentional, prefix it with an underscore: `_b`
warning: unused variable: `a`
--> /tmp/icemaker_global_tempdir.Zzjtx1Evw50c/rustc_testrunner_tmpdir_reporting.EkN8stMQHPaP/mvce.rs:5:14
|
5 | let b = |a: i32, b: i32| {};
| ^ help: if this is intentional, prefix it with an underscore: `_a`
warning: unused variable: `b`
--> /tmp/icemaker_global_tempdir.Zzjtx1Evw50c/rustc_testrunner_tmpdir_reporting.EkN8stMQHPaP/mvce.rs:5:22
|
5 | let b = |a: i32, b: i32| {};
| ^ help: if this is intentional, prefix it with an underscore: `_b`
warning: unused implementer of `Future` that must be used
--> /tmp/icemaker_global_tempdir.Zzjtx1Evw50c/rustc_testrunner_tmpdir_reporting.EkN8stMQHPaP/mvce.rs:6:5
|
6 | a(1, 2);
| ^^^^^^^
|
= note: futures do nothing unless you `.await` or poll them
= note: `#[warn(unused_must_use)]` on by default
error: internal compiler error: compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs:737:13: encode_ty: unexpected `CoroutineWitness(DefId(0:5 ~ mvce[abe4]::main::{closure#0}::{closure#0}), [])`
thread 'rustc' panicked at compiler/rustc_middle/src/util/bug.rs:35:44:
Box<dyn Any>
stack backtrace:
0: 0x7fc2e75a1fa5 - std::backtrace_rs::backtrace::libunwind::trace::h14c26439c9e659cb
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
1: 0x7fc2e75a1fa5 - std::backtrace_rs::backtrace::trace_unsynchronized::h44d92edd05bbbfda
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7fc2e75a1fa5 - std::sys_common::backtrace::_print_fmt::h13f1beea5570cb83
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/sys_common/backtrace.rs:68:5
3: 0x7fc2e75a1fa5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb8ca44e969e3f71b
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7fc2e75f2feb - core::fmt::rt::Argument::fmt::h5c946a89981df55e
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/core/src/fmt/rt.rs:142:9
5: 0x7fc2e75f2feb - core::fmt::write::hd586e7360777cc96
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/core/src/fmt/mod.rs:1153:17
6: 0x7fc2e7596cbf - std::io::Write::write_fmt::h710cbd7bbf99ccca
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/io/mod.rs:1843:15
7: 0x7fc2e75a1d7e - std::sys_common::backtrace::_print::hf1afff5c335e465f
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7fc2e75a1d7e - std::sys_common::backtrace::print::he54a51a147efc885
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7fc2e75a49f9 - std::panicking::default_hook::{{closure}}::hcd08c4e3ffa464ca
10: 0x7fc2e75a4763 - std::panicking::default_hook::h2663042b363aa298
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/panicking.rs:292:9
11: 0x7fc2e41ba58f - std[f1ab4ce7166604a0]::panicking::update_hook::<alloc[ef09d9835563b69e]::boxed::Box<rustc_driver_impl[76e846938966200a]::install_ice_hook::{closure#0}>>::{closure#0}
12: 0x7fc2e75a5150 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcd6186c20f61b1dd
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/alloc/src/boxed.rs:2034:9
13: 0x7fc2e75a5150 - std::panicking::rust_panic_with_hook::h2a6da5de52d72055
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/panicking.rs:783:13
14: 0x7fc2e41e6a54 - std[f1ab4ce7166604a0]::panicking::begin_panic::<rustc_errors[c906f5c4cf1f88ae]::ExplicitBug>::{closure#0}
15: 0x7fc2e41e3976 - std[f1ab4ce7166604a0]::sys_common::backtrace::__rust_end_short_backtrace::<std[f1ab4ce7166604a0]::panicking::begin_panic<rustc_errors[c906f5c4cf1f88ae]::ExplicitBug>::{closure#0}, !>
16: 0x7fc2e41e3656 - std[f1ab4ce7166604a0]::panicking::begin_panic::<rustc_errors[c906f5c4cf1f88ae]::ExplicitBug>
17: 0x7fc2e41efed1 - <rustc_errors[c906f5c4cf1f88ae]::diagnostic::BugAbort as rustc_errors[c906f5c4cf1f88ae]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
18: 0x7fc2e4675b91 - rustc_middle[712e48954d6afe8b]::util::bug::opt_span_bug_fmt::<rustc_span[74819862fbf5924e]::span_encoding::Span>::{closure#0}
19: 0x7fc2e4658ffa - rustc_middle[712e48954d6afe8b]::ty::context::tls::with_opt::<rustc_middle[712e48954d6afe8b]::util::bug::opt_span_bug_fmt<rustc_span[74819862fbf5924e]::span_encoding::Span>::{closure#0}, !>::{closure#0}
20: 0x7fc2e4658e98 - rustc_middle[712e48954d6afe8b]::ty::context::tls::with_context_opt::<rustc_middle[712e48954d6afe8b]::ty::context::tls::with_opt<rustc_middle[712e48954d6afe8b]::util::bug::opt_span_bug_fmt<rustc_span[74819862fbf5924e]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
21: 0x7fc2e239c5a0 - rustc_middle[712e48954d6afe8b]::util::bug::bug_fmt
22: 0x7fc2e4b28802 - rustc_symbol_mangling[6a6f4f831c70879f]::typeid::typeid_itanium_cxx_abi::encode_ty
23: 0x7fc2e4b260b7 - rustc_symbol_mangling[6a6f4f831c70879f]::typeid::typeid_itanium_cxx_abi::encode_args
24: 0x7fc2e4b26a8f - rustc_symbol_mangling[6a6f4f831c70879f]::typeid::typeid_itanium_cxx_abi::encode_ty
25: 0x7fc2e4b27252 - rustc_symbol_mangling[6a6f4f831c70879f]::typeid::typeid_itanium_cxx_abi::encode_ty
26: 0x7fc2e4b2b5f2 - rustc_symbol_mangling[6a6f4f831c70879f]::typeid::typeid_itanium_cxx_abi::typeid_for_fnabi
27: 0x7fc2e4b2a557 - rustc_symbol_mangling[6a6f4f831c70879f]::typeid::typeid_itanium_cxx_abi::typeid_for_instance
28: 0x7fc2e29d368a - <rustc_codegen_llvm[4330239e0645e5fe]::context::CodegenCx as rustc_codegen_ssa[c5bbf89d97e47a4c]::traits::declare::PreDefineMethods>::predefine_fn
29: 0x7fc2e6128613 - rustc_codegen_llvm[4330239e0645e5fe]::base::compile_codegen_unit::module_codegen
30: 0x7fc2e6124956 - <rustc_codegen_llvm[4330239e0645e5fe]::LlvmCodegenBackend as rustc_codegen_ssa[c5bbf89d97e47a4c]::traits::backend::ExtraBackendMethods>::compile_codegen_unit
31: 0x7fc2e631aceb - rustc_codegen_ssa[c5bbf89d97e47a4c]::base::codegen_crate::<rustc_codegen_llvm[4330239e0645e5fe]::LlvmCodegenBackend>
32: 0x7fc2e630daa9 - <rustc_codegen_llvm[4330239e0645e5fe]::LlvmCodegenBackend as rustc_codegen_ssa[c5bbf89d97e47a4c]::traits::backend::CodegenBackend>::codegen_crate
33: 0x7fc2e630d41f - rustc_interface[6e8cd5a4c59e5ecd]::passes::start_codegen
34: 0x7fc2e630cbbf - <rustc_interface[6e8cd5a4c59e5ecd]::queries::Queries>::codegen_and_build_linker
35: 0x7fc2e60900d7 - rustc_interface[6e8cd5a4c59e5ecd]::interface::run_compiler::<core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>, rustc_driver_impl[76e846938966200a]::run_compiler::{closure#0}>::{closure#0}
36: 0x7fc2e6160a45 - std[f1ab4ce7166604a0]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[6e8cd5a4c59e5ecd]::util::run_in_thread_with_globals<rustc_interface[6e8cd5a4c59e5ecd]::util::run_in_thread_pool_with_globals<rustc_interface[6e8cd5a4c59e5ecd]::interface::run_compiler<core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>, rustc_driver_impl[76e846938966200a]::run_compiler::{closure#0}>::{closure#0}, core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>>::{closure#0}, core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>>
37: 0x7fc2e6160872 - <<std[f1ab4ce7166604a0]::thread::Builder>::spawn_unchecked_<rustc_interface[6e8cd5a4c59e5ecd]::util::run_in_thread_with_globals<rustc_interface[6e8cd5a4c59e5ecd]::util::run_in_thread_pool_with_globals<rustc_interface[6e8cd5a4c59e5ecd]::interface::run_compiler<core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>, rustc_driver_impl[76e846938966200a]::run_compiler::{closure#0}>::{closure#0}, core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>>::{closure#0}, core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[254dfe32d5b92b13]::result::Result<(), rustc_span[74819862fbf5924e]::ErrorGuaranteed>>::{closure#1} as core[254dfe32d5b92b13]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
38: 0x7fc2e75ae919 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h24cb68345bc0eeeb
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/alloc/src/boxed.rs:2020:9
39: 0x7fc2e75ae919 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1d32c6c52d61212f
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/alloc/src/boxed.rs:2020:9
40: 0x7fc2e75ae919 - std::sys::pal::unix::thread::Thread::new::thread_start::h789f3c93e78a3e64
at /rustc/3cdcdaf31b45f8045164aae9604573d23091970b/library/std/src/sys/pal/unix/thread.rs:108:17
41: 0x7fc2e10a955a - <unknown>
42: 0x7fc2e1126a3c - <unknown>
43: 0x0 - <unknown>
note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
note: rustc 1.79.0-nightly (3cdcdaf31 2024-03-18) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z sanitizer=cfi -C codegen-units=1 -C lto -Z dump-mir-dir=dir
query stack during panic:
end of query stack
error: aborting due to 1 previous error; 5 warnings emitted
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Category: This is a bug.`#![feature(async_closure)]`Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Project group: Exploit mitigationsStatus: A Minimal Complete and Verifiable Example has been found for this issueRelevant to the compiler team, which will review and decide on the PR/issue.