ICE: attempted to read from stolen value

[matthiaskrgr]

Summary

static BLOCK_FN_DEF: fn(usize) -> usize = {
    fn foo(a: usize) -> usize {
        a + 10
    }
    foo
};
struct X; //~ ERROR the name `X` is defined multiple times

fn main() {}

clippy-driver 7A8BA9EAB353077681959D01D05ABED1177C84A6CEFB373E1FE5C6AC8E0E5907.rs -Zvalidate-mir -Wclippy::missing_const_for_fn

Version

rustc 1.88.0-nightly (50aa04180 2025-05-08)
binary: rustc
commit-hash: 50aa04180709189a03dde5fd1c05751b2625ed37
commit-date: 2025-05-08
host: x86_64-unknown-linux-gnu
release: 1.88.0-nightly
LLVM version: 20.1.4

Error output

Backtrace

warning: static `BLOCK_FN_DEF` is never used
--> 7A8BA9EAB353077681959D01D05ABED1177C84A6CEFB373E1FE5C6AC8E0E5907.rs:1:8
|
1 | static BLOCK_FN_DEF: fn(usize) -> usize = {
|        ^^^^^^^^^^^^
|
= note: `#[warn(dead_code)]` on by default

warning: struct `X` is never constructed
--> 7A8BA9EAB353077681959D01D05ABED1177C84A6CEFB373E1FE5C6AC8E0E5907.rs:7:8
|
7 | struct X; //~ ERROR the name `X` is defined multiple times
|        ^


thread 'rustc' panicked at src/tools/clippy/clippy_lints/src/missing_const_for_fn.rs:160:50:
attempted to read from stolen value: rustc_middle::mir::Body
stack backtrace:
 0:     0x7f7aa4763923 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h35b8f72326f85230
 1:     0x7f7aa4e05c07 - core::fmt::write::h73f5af0fa08ac030
 2:     0x7f7aa5ee42d1 - std::io::Write::write_fmt::h0140e0dae4becf43
 3:     0x7f7aa4763782 - std::sys::backtrace::BacktraceLock::print::h2c50f8265df4edf7
 4:     0x7f7aa476737a - std::panicking::default_hook::{{closure}}::h4f831a137f70e67f
 5:     0x7f7aa4766eff - std::panicking::default_hook::h47af645a18677257
 6:     0x7f7aa3795ef3 - std[e444442488e5ea2d]::panicking::update_hook::<alloc[24374ce535a764d]::boxed::Box<rustc_driver_impl[d80da60e87609ad4]::install_ice_hook::{closure#1}>>::{closure#0}
 7:     0x7f7aa4767bf3 - std::panicking::rust_panic_with_hook::h2b8636e09e17cf97
 8:     0x7f7aa47678ea - std::panicking::begin_panic_handler::{{closure}}::h21b513d3b95c0c8c
 9:     0x7f7aa4763de9 - std::sys::backtrace::__rust_end_short_backtrace::h1fff5f9fcecd2e0e
10:     0x7f7aa47675ad - __rustc[f67a3b4e60d8f4c4]::rust_begin_unwind
11:     0x7f7aa1085ce0 - core::panicking::panic_fmt::h0a5d5e7acfcd4e48
12:     0x5b8e8a06efe2 - <rustc_data_structures[c2151ea158282339]::steal::Steal<rustc_middle[dca19e53efad7b1b]::mir::Body>>::borrow
13:     0x5b8e8a24191a - <clippy_lints[9db272bf031097ce]::missing_const_for_fn::MissingConstForFn as rustc_lint[ed09b7a07297b4c1]::passes::LateLintPass>::check_fn
14:     0x7f7aa3d144f8 - <rustc_lint[ed09b7a07297b4c1]::late::LateContextAndPass<rustc_lint[ed09b7a07297b4c1]::late::RuntimeCombinedLateLintPass> as rustc_hir[af6f8bbf2100f3d8]::intravisit::Visitor>::visit_fn
15:     0x7f7aa3cfc514 - <rustc_lint[ed09b7a07297b4c1]::late::LateContextAndPass<rustc_lint[ed09b7a07297b4c1]::late::RuntimeCombinedLateLintPass> as rustc_hir[af6f8bbf2100f3d8]::intravisit::Visitor>::visit_nested_item
16:     0x7f7aa3d14c4d - <rustc_lint[ed09b7a07297b4c1]::late::LateContextAndPass<rustc_lint[ed09b7a07297b4c1]::late::RuntimeCombinedLateLintPass> as rustc_hir[af6f8bbf2100f3d8]::intravisit::Visitor>::visit_block
17:     0x7f7aa3d141e7 - <rustc_lint[ed09b7a07297b4c1]::late::LateContextAndPass<rustc_lint[ed09b7a07297b4c1]::late::RuntimeCombinedLateLintPass> as rustc_hir[af6f8bbf2100f3d8]::intravisit::Visitor>::visit_expr::{closure#0}::{closure#0}
18:     0x7f7aa3d13a87 - <rustc_lint[ed09b7a07297b4c1]::late::LateContextAndPass<rustc_lint[ed09b7a07297b4c1]::late::RuntimeCombinedLateLintPass> as rustc_hir[af6f8bbf2100f3d8]::intravisit::Visitor>::visit_expr
19:     0x7f7aa3d138c2 - <rustc_lint[ed09b7a07297b4c1]::late::LateContextAndPass<rustc_lint[ed09b7a07297b4c1]::late::RuntimeCombinedLateLintPass> as rustc_hir[af6f8bbf2100f3d8]::intravisit::Visitor>::visit_nested_body
20:     0x7f7aa3cfc100 - <rustc_lint[ed09b7a07297b4c1]::late::LateContextAndPass<rustc_lint[ed09b7a07297b4c1]::late::RuntimeCombinedLateLintPass> as rustc_hir[af6f8bbf2100f3d8]::intravisit::Visitor>::visit_nested_item
21:     0x7f7aa5dea71e - rustc_lint[ed09b7a07297b4c1]::late::check_crate::{closure#0}
22:     0x7f7aa5dea9c9 - rustc_lint[ed09b7a07297b4c1]::late::check_crate
23:     0x7f7aa5de8cdf - rustc_interface[4b2c44076e9c0aea]::passes::analysis
24:     0x7f7aa5de8ab5 - rustc_query_impl[d196c070bbe03594]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d196c070bbe03594]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 0usize]>>
25:     0x7f7aa5d3ccfa - rustc_query_system[ff49814a586d4008]::query::plumbing::try_execute_query::<rustc_query_impl[d196c070bbe03594]::DynamicConfig<rustc_query_system[ff49814a586d4008]::query::caches::SingleCache<rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[d196c070bbe03594]::plumbing::QueryCtxt, false>
26:     0x7f7aa5d3c9cf - rustc_query_impl[d196c070bbe03594]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
27:     0x7f7aa6034b87 - rustc_interface[4b2c44076e9c0aea]::passes::create_and_enter_global_ctxt::<core[ce1fa00964895ff1]::option::Option<rustc_interface[4b2c44076e9c0aea]::queries::Linker>, rustc_driver_impl[d80da60e87609ad4]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
28:     0x7f7aa5f0b5a6 - rustc_interface[4b2c44076e9c0aea]::interface::run_compiler::<(), rustc_driver_impl[d80da60e87609ad4]::run_compiler::{closure#0}>::{closure#1}
29:     0x7f7aa5edad7e - std[e444442488e5ea2d]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[4b2c44076e9c0aea]::util::run_in_thread_with_globals<rustc_interface[4b2c44076e9c0aea]::util::run_in_thread_pool_with_globals<rustc_interface[4b2c44076e9c0aea]::interface::run_compiler<(), rustc_driver_impl[d80da60e87609ad4]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
30:     0x7f7aa5edb1f4 - <<std[e444442488e5ea2d]::thread::Builder>::spawn_unchecked_<rustc_interface[4b2c44076e9c0aea]::util::run_in_thread_with_globals<rustc_interface[4b2c44076e9c0aea]::util::run_in_thread_pool_with_globals<rustc_interface[4b2c44076e9c0aea]::interface::run_compiler<(), rustc_driver_impl[d80da60e87609ad4]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[ce1fa00964895ff1]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
31:     0x7f7aa5edc5eb - std::sys::pal::unix::thread::Thread::new::thread_start::h8985427f793e6fe1
32:     0x7f7a9fa9caa4 - start_thread
                             at ./nptl/pthread_create.c:447:8
33:     0x7f7a9fb29c3c - clone3
                             at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78:0
34:                0x0 - <unknown>

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust-clippy/issues/new?template=ice.yml

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

note: please attach the file at `/home/gh-matthiaskrgr/vcs/github/rust_misc_stuff/tests/im/rustc-ice-2025-05-10T09_15_12-3604898.txt` to your bug report

note: compiler flags: -Z validate-mir

query stack during panic:
#0 [analysis] running analysis passes on this crate
end of query stack
note: Clippy version: clippy 0.1.88 (50aa041807 2025-05-08)

warning: 2 warnings emitted

gh-matthiaskrgr@dev-desktop-eu-2:~/vcs/githu

[samueltardieu]

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