warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes --> /tmp/icemaker_global_tempdir.tDpCHeI4R4t9/rustc_testrunner_tmpdir_reporting.Lo4fDYzUFauY/mvce.rs:1:12 | 1 | #![feature(generic_const_exprs)] | ^^^^^^^^^^^^^^^^^^^ | = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information = note: `#[warn(incomplete_features)]` on by default warning: function `foo` is never used --> /tmp/icemaker_global_tempdir.tDpCHeI4R4t9/rustc_testrunner_tmpdir_reporting.Lo4fDYzUFauY/mvce.rs:2:4 | 2 | fn foo<'a, T: 'a>(_: [(); std::mem::offset_of!((T,), 0)]) {} | ^^^ | = note: `#[warn(dead_code)]` on by default warning: 2 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: Missing value for constant, but no error reported? --> /tmp/icemaker_global_tempdir.tDpCHeI4R4t9/rustc_testrunner_tmpdir_reporting.Lo4fDYzUFauY/mvce.rs:2:27 | 2 | fn foo<'a, T: 'a>(_: [(); std::mem::offset_of!((T,), 0)]) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | note: delayed at compiler/rustc_trait_selection/src/traits/const_evaluatable.rs:74:68 - disabled backtrace --> /tmp/icemaker_global_tempdir.tDpCHeI4R4t9/rustc_testrunner_tmpdir_reporting.Lo4fDYzUFauY/mvce.rs:2:27 | 2 | fn foo<'a, T: 'a>(_: [(); std::mem::offset_of!((T,), 0)]) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ = note: this error: internal compiler error originates in the macro `std::mem::offset_of` (in Nightly builds, run with -Z macro-backtrace for more info) error: internal compiler error: errors selecting obligation during MIR typeck: [TrueError] | = note: delayed at /rustc/5ad98b4026d5172f27615b105658bc8bfd677be8/compiler/rustc_trait_selection/src/traits/query/type_op/custom.rs:94:18 - disabled backtrace 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 1.82.0-nightly (5ad98b402 2024-08-22) running on x86_64-unknown-linux-gnu note: compiler flags: --crate-type lib -Z dump-mir-dir=dir query stack during panic: end of query stack