ICE: `internal compiler error[E0391]: cycle detected when computing function signature of impl`

[matthiaskrgr]

auto-reduced (treereduce-rust):

//@compile-flags: --edition=2018 --crate-type=lib
#![feature(cmse_nonsecure_entry)]
struct Test;

impl Test {
    pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
}

original:

struct Test;

impl Test {
    pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {

    }
}

Version information

rustc 1.84.0-nightly (a0d98ff0e 2024-10-31)
binary: rustc
commit-hash: a0d98ff0e5b6e1f2c63fd26f68484792621b235c
commit-date: 2024-10-31
host: x86_64-unknown-linux-gnu
release: 1.84.0-nightly
LLVM version: 19.1.1

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zcrate-attr=feature(cmse_nonsecure_entry) --edition=2018 --crate-type=lib

Program output

warning: struct `Test` is never constructed
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:1:8
  |
1 | struct Test;
  |        ^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: associated function `test` is never used
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:57
  |
3 | impl Test {
  | --------- associated function in this implementation
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |                                                         ^^^^

warning: `extern` fn uses type `str`, which is not FFI-safe
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:67
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |                                                                   ^^^^ not FFI-safe
  |
  = help: consider using `*const u8` and a length instead
  = note: string slices have no C equivalent
  = note: `#[warn(improper_ctypes_definitions)]` on by default

warning: `extern` fn uses type `impl Future<Output = ()>`, which is not FFI-safe
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
  |
  = note: opaque types have no C equivalent

warning: 4 warnings emitted

note: no errors encountered even though delayed bugs were created

note: those delayed bugs will now be shown as internal compiler errors

error: internal compiler error[E0391]: cycle detected when computing function signature of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: ...which requires computing layout of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
  = note: ...which requires normalizing `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
note: ...which requires computing type of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires computing type of opaque `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires type-checking `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires computing the opaque types defined by `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: ...which again requires computing function signature of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`, completing the cycle
note: cycle used when checking that `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test` is well-formed
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
note: delayed at compiler/rustc_query_system/src/query/job.rs:596:16 - disabled backtrace
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: internal compiler error[E0391]: cycle detected when computing function signature of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: ...which requires computing layout of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
  = note: ...which requires normalizing `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
note: ...which requires computing type of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires computing type of opaque `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires type-checking `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: ...which again requires computing function signature of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`, completing the cycle
note: cycle used when checking that `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test` is well-formed
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
note: delayed at compiler/rustc_query_system/src/query/job.rs:596:16 - disabled backtrace
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: internal compiler error[E0391]: cycle detected when computing function signature of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: ...which requires computing layout of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
  = note: ...which requires normalizing `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
note: ...which requires computing type of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires computing type of opaque `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires borrow-checking `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires promoting constants in MIR for `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires checking if `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test` contains FFI-unwind calls...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires building MIR for `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: ...which again requires computing function signature of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`, completing the cycle
note: cycle used when checking that `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test` is well-formed
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
note: delayed at compiler/rustc_query_system/src/query/job.rs:596:16 - disabled backtrace
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: internal compiler error[E0391]: cycle detected when computing function signature of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: ...which requires computing layout of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
  = note: ...which requires normalizing `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
note: ...which requires computing type of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires computing type of opaque `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test::{opaque#0}`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires borrow-checking `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires promoting constants in MIR for `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires checking if `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test` contains FFI-unwind calls...
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: ...which again requires computing function signature of `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test`, completing the cycle
note: cycle used when checking that `<impl at /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:3:1: 3:10>::test` is well-formed
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
note: delayed at compiler/rustc_query_system/src/query/job.rs:596:16 - disabled backtrace
 --> /tmp/icemaker_global_tempdir.q2k4BBLCKuN9/rustc_testrunner_tmpdir_reporting.5aASWsrfzxJL/mvce.rs:4:5
  |
4 |     pub async unsafe extern "C-cmse-nonsecure-entry" fn test(val: &str) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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: please make sure that you have updated to the latest nightly

note: rustc 1.84.0-nightly (a0d98ff0e 2024-10-31) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z crate-attr=feature(cmse_nonsecure_entry) --crate-type lib -Z dump-mir-dir=dir

query stack during panic:
end of query stack

@rustbot label +F-cmse_nonsecure_entry

[matthiaskrgr]

#130747

[jieyouxu]

cc @folkertdev in case you want to look into it