ICE: src/isa/x64/abi.rs:743:68: 'called Result::unwrap() on an Err value: TryFromIntError(())

[matthiaskrgr]

auto-reduced (treereduce-rust):

//@compile-flags: -Zcodegen-backend=cranelift --crate-type=lib
//

pub const fn foo() {
    let mut array = [[0; 0x12345679]; 1];
}

original:

//@ check-pass
// Regression test for issue #79152
//
// Tests that we can index an array in a const function

pub const fn foo() {
    let mut array = [[0; 0x12345679]; 1];
    array[0][3490] = 1;
}

Version information

rustc 1.86.0-nightly (1891c2866 2025-01-04)
binary: rustc
commit-hash: 1891c28669863bf7ed3ef8f43f2d3fa546f34861
commit-date: 2025-01-04
host: x86_64-unknown-linux-gnu
release: 1.86.0-nightly
LLVM version: 19.1.6

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zcodegen-backend=cranelift --crate-type=lib

Program output

warning: unused variable: `array`
 --> /tmp/icemaker_global_tempdir.eFjNhF4XNbW5/rustc_testrunner_tmpdir_reporting.b1NV3CWuBxKo/mvce.rs:4:13
  |
4 |     let mut array = [[0; 0x12345679]; 1];
  |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_array`
  |
  = note: `#[warn(unused_variables)]` on by default

warning: variable does not need to be mutable
 --> /tmp/icemaker_global_tempdir.eFjNhF4XNbW5/rustc_testrunner_tmpdir_reporting.b1NV3CWuBxKo/mvce.rs:4:9
  |
4 |     let mut array = [[0; 0x12345679]; 1];
  |         ----^^^^^
  |         |
  |         help: remove this `mut`
  |
  = note: `#[warn(unused_mut)]` on by default


thread '<unnamed>' panicked at /rust/deps/cranelift-codegen-0.114.0/src/isa/x64/abi.rs:743:68:
called `Result::unwrap()` on an `Err` value: TryFromIntError(())
stack backtrace:
   0:     0x7a23fe0d34ba - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hc56bb2061e3f2faf
   1:     0x7a23fe8135e6 - core::fmt::write::hf476acdbab1f8242
   2:     0x7a23ff71a311 - std::io::Write::write_fmt::hff3ae507590478c7
   3:     0x7a23fe0d3312 - std::sys::backtrace::BacktraceLock::print::h59430f67692bb429
   4:     0x7a23fe0d58b7 - std::panicking::default_hook::{{closure}}::h85fc82fd35f7c854
   5:     0x7a23fe0d56a0 - std::panicking::default_hook::h149038da7be0a2dc
   6:     0x7a23fd250738 - std[3aac40dc3bd55acb]::panicking::update_hook::<alloc[11ef5de1b489fae0]::boxed::Box<rustc_driver_impl[550e196038d14fc8]::install_ice_hook::{closure#1}>>::{closure#0}
   7:     0x7a23fe0d6103 - std::panicking::rust_panic_with_hook::h91fff69bbdba9796
   8:     0x7a23fe0d5dfa - std::panicking::begin_panic_handler::{{closure}}::hd4b1f7b56f925873
   9:     0x7a23fe0d3989 - std::sys::backtrace::__rust_end_short_backtrace::hd7883fbf49e31f3d
  10:     0x7a23fe0d5abd - rust_begin_unwind
  11:     0x7a23fad9e730 - core::panicking::panic_fmt::h67ab54dd60b05f99
  12:     0x7a23fb1fd5f6 - core::result::unwrap_failed::h353552c90ac0676e
  13:     0x7a23ef81c93b - <cranelift_codegen[bd234fa8b941f2]::isa::x64::abi::X64ABIMachineSpec as cranelift_codegen[bd234fa8b941f2]::machinst::abi::ABIMachineSpec>::gen_clobber_save
  14:     0x7a23ef7a497b - <cranelift_codegen[bd234fa8b941f2]::machinst::vcode::VCode<cranelift_codegen[bd234fa8b941f2]::isa::x64::lower::isle::generated_code::MInst>>::emit
  15:     0x7a23ef849a1b - <cranelift_codegen[bd234fa8b941f2]::isa::x64::X64Backend as cranelift_codegen[bd234fa8b941f2]::isa::TargetIsa>::compile_function
  16:     0x7a23ef8cc705 - <cranelift_codegen[bd234fa8b941f2]::context::Context>::compile_stencil
  17:     0x7a23ef8cd040 - <cranelift_codegen[bd234fa8b941f2]::context::Context>::compile
  18:     0x7a23ef695e31 - <cranelift_object[c43bbcd72abb143b]::backend::ObjectModule as cranelift_module[512baebcd4621a44]::module::Module>::define_function_with_control_plane
  19:     0x7a23ef65872e - rustc_codegen_cranelift[bb5c3dc512b2c6bb]::driver::aot::module_codegen::{closure#0}
  20:     0x7a23ef5ebb99 - std[3aac40dc3bd55acb]::sys::backtrace::__rust_begin_short_backtrace::<rustc_codegen_cranelift[bb5c3dc512b2c6bb]::driver::aot::module_codegen::{closure#0}, core[b46bc0d640c29f3e]::result::Result<rustc_codegen_cranelift[bb5c3dc512b2c6bb]::driver::aot::ModuleCodegenResult, alloc[11ef5de1b489fae0]::string::String>>
  21:     0x7a23ef5f5633 - <<std[3aac40dc3bd55acb]::thread::Builder>::spawn_unchecked_<rustc_codegen_cranelift[bb5c3dc512b2c6bb]::driver::aot::module_codegen::{closure#0}, core[b46bc0d640c29f3e]::result::Result<rustc_codegen_cranelift[bb5c3dc512b2c6bb]::driver::aot::ModuleCodegenResult, alloc[11ef5de1b489fae0]::string::String>>::{closure#1} as core[b46bc0d640c29f3e]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  22:     0x7a23ff615aef - std::sys::pal::unix::thread::Thread::new::thread_start::h9fd3085ff298f095
  23:     0x7a23f9aa339d - <unknown>
  24:     0x7a23f9b2849c - <unknown>
  25:                0x0 - <unknown>

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

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 1.86.0-nightly (1891c2866 2025-01-04) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z codegen-backend=cranelift --crate-type lib -Z dump-mir-dir=dir

query stack during panic:
end of query stack
warning: 2 warnings emitted

[bjorn3]

Probably similar root cause to #1434 (not early rejecting stack slots that are too large)