rustc 1.72 beta ICE error: internal compiler error: /rustc/598a0a3cb36343e08bc682670a728837fda6674a/compiler/rustc_codegen_ssa/src/mir/constant.rs:70:22 when compiling Firefox

[glandium]

STR (thankfully smaller than Firefox, with rustc 1.72.0-beta.8 (598a0a3 2023-08-12)):

• Clone https://github.com/hsivonen/encoding_rs
• Build with RUSTC_BOOTSTRAP=1 cargo +beta build --features packed_simd,simd-accel (yes, I know, we're not supposed to do that, but SIMD can't come soon enough)

The ICE itself:

error: internal compiler error: /rustc/598a0a3cb36343e08bc682670a728837fda6674a/compiler/rustc_codegen_ssa/src/mir/constant.rs:70:22: Ty(
                                    Const { ty: [u32; 16], kind: IDX/#0 },
                                )
  --> /home/glandium/.cargo/registry/src/index.crates.io-6f17d22bba15001f/packed_simd-0.3.9/src/codegen/llvm.rs:49:24
   |
49 |     simd_shuffle(x, y, IDX)
   |                        ^^^

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/598a0a3cb36343e08bc682670a728837fda6674a/compiler/rustc_errors/src/lib.rs:995:33
stack backtrace:
   0:     0x7f26e2d63a71 - std::backtrace_rs::backtrace::libunwind::trace::he907b86be5a074bf
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f26e2d63a71 - std::backtrace_rs::backtrace::trace_unsynchronized::hc8f1b6f22b44dbbd
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f26e2d63a71 - std::sys_common::backtrace::_print_fmt::he9399e283a09e4ac
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f26e2d63a71 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h74cbbdd6e9a12194
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f26e2dc9d7f - core::fmt::rt::Argument::fmt::h9dcd348df0a515ce
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/core/src/fmt/rt.rs:138:9
   5:     0x7f26e2dc9d7f - core::fmt::write::h797f9b5fcce66ce2
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f26e2d564b7 - std::io::Write::write_fmt::h2cc54209b64f9257
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/io/mod.rs:1714:15
   7:     0x7f26e2d63885 - std::sys_common::backtrace::_print::h5c1bded59b35d737
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f26e2d63885 - std::sys_common::backtrace::print::hdf39404b70de8847
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f26e2d66663 - std::panicking::default_hook::{{closure}}::h8cc61acc3160d9ec
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/panicking.rs:269:22
  10:     0x7f26e2d663f4 - std::panicking::default_hook::h4ed550b1720b61df
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/panicking.rs:288:9
  11:     0x7f26e60479db - rustc_driver_impl[4f58748155a7808f]::install_ice_hook::{closure#0}
  12:     0x7f26e2d66e8e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcd80eb87bf035864
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/alloc/src/boxed.rs:2007:9
  13:     0x7f26e2d66e8e - std::panicking::rust_panic_with_hook::h8d85a8792b2e9142
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/panicking.rs:709:13
  14:     0x7f26e5ee1031 - std[480f6991fdf244e4]::panicking::begin_panic::<rustc_errors[12366acd2388f881]::ExplicitBug>::{closure#0}
  15:     0x7f26e5ee0ca6 - std[480f6991fdf244e4]::sys_common::backtrace::__rust_end_short_backtrace::<std[480f6991fdf244e4]::panicking::begin_panic<rustc_errors[12366acd2388f881]::ExplicitBug>::{closure#0}, !>
  16:     0x7f26e5ea4456 - std[480f6991fdf244e4]::panicking::begin_panic::<rustc_errors[12366acd2388f881]::ExplicitBug>
  17:     0x7f26e5ec0b02 - <rustc_errors[12366acd2388f881]::HandlerInner>::span_bug::<rustc_span[1c21d65e766a0dc0]::span_encoding::Span, alloc[e4f0635e60ac80e6]::string::String>
  18:     0x7f26e5ec0926 - <rustc_errors[12366acd2388f881]::Handler>::span_bug::<rustc_span[1c21d65e766a0dc0]::span_encoding::Span, alloc[e4f0635e60ac80e6]::string::String>
  19:     0x7f26e5ed4e9d - rustc_middle[35cdf0e183cfd1ac]::util::bug::opt_span_bug_fmt::<rustc_span[1c21d65e766a0dc0]::span_encoding::Span>::{closure#0}
  20:     0x7f26e5ed4eca - rustc_middle[35cdf0e183cfd1ac]::ty::context::tls::with_opt::<rustc_middle[35cdf0e183cfd1ac]::util::bug::opt_span_bug_fmt<rustc_span[1c21d65e766a0dc0]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f26e5ed354a - rustc_middle[35cdf0e183cfd1ac]::ty::context::tls::with_context_opt::<rustc_middle[35cdf0e183cfd1ac]::ty::context::tls::with_opt<rustc_middle[35cdf0e183cfd1ac]::util::bug::opt_span_bug_fmt<rustc_span[1c21d65e766a0dc0]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f26e48ee844 - rustc_middle[35cdf0e183cfd1ac]::util::bug::span_bug_fmt::<rustc_span[1c21d65e766a0dc0]::span_encoding::Span>
  23:     0x7f26e49512cd - <rustc_codegen_ssa[e090b1107a25c2c0]::mir::FunctionCx<rustc_codegen_llvm[62c8b4d51ba9e411]::builder::Builder>>::simd_shuffle_indices
  24:     0x7f26e4925163 - <core[ab88971f7bd07419]::iter::adapters::map::Map<core[ab88971f7bd07419]::iter::adapters::enumerate::Enumerate<core[ab88971f7bd07419]::slice::iter::Iter<rustc_middle[35cdf0e183cfd1ac]::mir::syntax::Operand>>, <rustc_codegen_ssa[e090b1107a25c2c0]::mir::FunctionCx<rustc_codegen_llvm[62c8b4d51ba9e411]::builder::Builder>>::codegen_call_terminator::{closure#2}> as core[ab88971f7bd07419]::iter::traits::iterator::Iterator>::fold::<(), core[ab88971f7bd07419]::iter::traits::iterator::Iterator::for_each::call<rustc_codegen_ssa[e090b1107a25c2c0]::mir::operand::OperandRef<&rustc_codegen_llvm[62c8b4d51ba9e411]::llvm_::ffi::Value>, <alloc[e4f0635e60ac80e6]::vec::Vec<rustc_codegen_ssa[e090b1107a25c2c0]::mir::operand::OperandRef<&rustc_codegen_llvm[62c8b4d51ba9e411]::llvm_::ffi::Value>>>::extend_trusted<core[ab88971f7bd07419]::iter::adapters::map::Map<core[ab88971f7bd07419]::iter::adapters::enumerate::Enumerate<core[ab88971f7bd07419]::slice::iter::Iter<rustc_middle[35cdf0e183cfd1ac]::mir::syntax::Operand>>, <rustc_codegen_ssa[e090b1107a25c2c0]::mir::FunctionCx<rustc_codegen_llvm[62c8b4d51ba9e411]::builder::Builder>>::codegen_call_terminator::{closure#2}>>::{closure#0}>::{closure#0}>
  25:     0x7f26e4924f63 - <alloc[e4f0635e60ac80e6]::vec::Vec<rustc_codegen_ssa[e090b1107a25c2c0]::mir::operand::OperandRef<&rustc_codegen_llvm[62c8b4d51ba9e411]::llvm_::ffi::Value>> as alloc[e4f0635e60ac80e6]::vec::spec_from_iter::SpecFromIter<rustc_codegen_ssa[e090b1107a25c2c0]::mir::operand::OperandRef<&rustc_codegen_llvm[62c8b4d51ba9e411]::llvm_::ffi::Value>, core[ab88971f7bd07419]::iter::adapters::map::Map<core[ab88971f7bd07419]::iter::adapters::enumerate::Enumerate<core[ab88971f7bd07419]::slice::iter::Iter<rustc_middle[35cdf0e183cfd1ac]::mir::syntax::Operand>>, <rustc_codegen_ssa[e090b1107a25c2c0]::mir::FunctionCx<rustc_codegen_llvm[62c8b4d51ba9e411]::builder::Builder>>::codegen_call_terminator::{closure#2}>>>::from_iter
  26:     0x7f26e48da3ef - rustc_codegen_ssa[e090b1107a25c2c0]::mir::codegen_mir::<rustc_codegen_llvm[62c8b4d51ba9e411]::builder::Builder>
  27:     0x7f26e560bcea - rustc_codegen_llvm[62c8b4d51ba9e411]::base::compile_codegen_unit::module_codegen
  28:     0x7f26e560b8b5 - <rustc_middle[35cdf0e183cfd1ac]::dep_graph::dep_node::DepKind as rustc_query_system[7ec998921a9428be]::dep_graph::DepKind>::with_deps::<<rustc_query_system[7ec998921a9428be]::dep_graph::graph::DepGraphData<rustc_middle[35cdf0e183cfd1ac]::dep_graph::dep_node::DepKind>>::with_task<rustc_middle[35cdf0e183cfd1ac]::ty::context::TyCtxt, rustc_span[1c21d65e766a0dc0]::symbol::Symbol, rustc_codegen_ssa[e090b1107a25c2c0]::ModuleCodegen<rustc_codegen_llvm[62c8b4d51ba9e411]::ModuleLlvm>>::{closure#0}::{closure#0}, rustc_codegen_ssa[e090b1107a25c2c0]::ModuleCodegen<rustc_codegen_llvm[62c8b4d51ba9e411]::ModuleLlvm>>
  29:     0x7f26e560b0bf - rustc_codegen_llvm[62c8b4d51ba9e411]::base::compile_codegen_unit
  30:     0x7f26e55f43af - rustc_codegen_ssa[e090b1107a25c2c0]::base::codegen_crate::<rustc_codegen_llvm[62c8b4d51ba9e411]::LlvmCodegenBackend>
  31:     0x7f26e55f3cb6 - <rustc_codegen_llvm[62c8b4d51ba9e411]::LlvmCodegenBackend as rustc_codegen_ssa[e090b1107a25c2c0]::traits::backend::CodegenBackend>::codegen_crate
  32:     0x7f26e523c8f2 - <rustc_session[98a8227d0036e49e]::session::Session>::time::<alloc[e4f0635e60ac80e6]::boxed::Box<dyn core[ab88971f7bd07419]::any::Any>, rustc_interface[9454197c0663f660]::passes::start_codegen::{closure#0}>
  33:     0x7f26e523c43b - rustc_interface[9454197c0663f660]::passes::start_codegen
  34:     0x7f26e52361ea - <rustc_middle[35cdf0e183cfd1ac]::ty::context::GlobalCtxt>::enter::<<rustc_interface[9454197c0663f660]::queries::Queries>::ongoing_codegen::{closure#0}, core[ab88971f7bd07419]::result::Result<alloc[e4f0635e60ac80e6]::boxed::Box<dyn core[ab88971f7bd07419]::any::Any>, rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>>
  35:     0x7f26e5235203 - <rustc_interface[9454197c0663f660]::interface::Compiler>::enter::<rustc_driver_impl[4f58748155a7808f]::run_compiler::{closure#1}::{closure#2}, core[ab88971f7bd07419]::result::Result<core[ab88971f7bd07419]::option::Option<rustc_interface[9454197c0663f660]::queries::Linker>, rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>>
  36:     0x7f26e522e2f5 - rustc_span[1c21d65e766a0dc0]::set_source_map::<core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>, rustc_interface[9454197c0663f660]::interface::run_compiler<core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>, rustc_driver_impl[4f58748155a7808f]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  37:     0x7f26e522dd66 - <scoped_tls[21ade261175d8f7f]::ScopedKey<rustc_span[1c21d65e766a0dc0]::SessionGlobals>>::set::<rustc_interface[9454197c0663f660]::interface::run_compiler<core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>, rustc_driver_impl[4f58748155a7808f]::run_compiler::{closure#1}>::{closure#0}, core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>>
  38:     0x7f26e522d32c - std[480f6991fdf244e4]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[9454197c0663f660]::util::run_in_thread_pool_with_globals<rustc_interface[9454197c0663f660]::interface::run_compiler<core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>, rustc_driver_impl[4f58748155a7808f]::run_compiler::{closure#1}>::{closure#0}, core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>>
  39:     0x7f26e522d0f5 - <<std[480f6991fdf244e4]::thread::Builder>::spawn_unchecked_<rustc_interface[9454197c0663f660]::util::run_in_thread_pool_with_globals<rustc_interface[9454197c0663f660]::interface::run_compiler<core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>, rustc_driver_impl[4f58748155a7808f]::run_compiler::{closure#1}>::{closure#0}, core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ab88971f7bd07419]::result::Result<(), rustc_span[1c21d65e766a0dc0]::ErrorGuaranteed>>::{closure#1} as core[ab88971f7bd07419]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  40:     0x7f26e2d71305 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf1b68689a77864ac
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/alloc/src/boxed.rs:1993:9
  41:     0x7f26e2d71305 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he27f59da8d845828
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/alloc/src/boxed.rs:1993:9
  42:     0x7f26e2d71305 - std::sys::unix::thread::Thread::new::thread_start::h3c599ac9d675f30c
                               at /rustc/598a0a3cb36343e08bc682670a728837fda6674a/library/std/src/sys/unix/thread.rs:108:17
  43:     0x7f26e2b0f044 - start_thread
                               at ./nptl/pthread_create.c:442:8
  44:     0x7f26e2b8f5fc - __GI___clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
  45:                0x0 - <unknown>

[matthiaskrgr]

cc #113500 , might just need beta backport?

[glandium]

rustc 1.72.0-nightly (6162f6f 2023-07-01): good
rustc 1.72.0-nightly (839e9a6 2023-07-02): bad

rustc 1.73.0-nightly (39f42ad 2023-07-19): bad
rustc 1.73.0-nightly (399b068 2023-07-20): good

that would match.

[AlifianK]

Might not be related but ripgrep also failed to build again with simd-accel enabled.

rustc --version --verbose
rustc 1.73.0-nightly (0bdb00d55 2023-08-15)
binary: rustc
commit-hash: 0bdb00d55aa7d6aebe5a01bc6d3c5bf474a853ab
commit-date: 2023-08-15
host: x86_64-pc-windows-msvc
release: 1.73.0-nightly
LLVM version: 17.0.0

cargo build --release --features 'pcre2 simd-accel'
   Compiling packed_simd_2 v0.3.8
   Compiling clap v2.34.0
   Compiling ignore v0.4.20 (D:\Dev\ripgrep\crates\ignore)
   Compiling ripgrep v13.0.0 (D:\Dev\ripgrep)
error: unrecognized platform-specific intrinsic function: `simd_shuffle2`
  --> C:\Users\A\.cargo\registry\src\index.crates.io-6f17d22bba15001f\packed_simd_2-0.3.8\src\codegen\llvm.rs:10:5
   |
10 |     pub fn simd_shuffle2<T, U>(x: T, y: T, idx: [u32; 2]) -> U;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unrecognized platform-specific intrinsic function: `simd_shuffle4`
  --> C:\Users\A\.cargo\registry\src\index.crates.io-6f17d22bba15001f\packed_simd_2-0.3.8\src\codegen\llvm.rs:11:5
   |
11 |     pub fn simd_shuffle4<T, U>(x: T, y: T, idx: [u32; 4]) -> U;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unrecognized platform-specific intrinsic function: `simd_shuffle8`
  --> C:\Users\A\.cargo\registry\src\index.crates.io-6f17d22bba15001f\packed_simd_2-0.3.8\src\codegen\llvm.rs:12:5
   |
12 |     pub fn simd_shuffle8<T, U>(x: T, y: T, idx: [u32; 8]) -> U;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unrecognized platform-specific intrinsic function: `simd_shuffle16`
  --> C:\Users\A\.cargo\registry\src\index.crates.io-6f17d22bba15001f\packed_simd_2-0.3.8\src\codegen\llvm.rs:13:5
   |
13 |     pub fn simd_shuffle16<T, U>(x: T, y: T, idx: [u32; 16]) -> U;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unrecognized platform-specific intrinsic function: `simd_shuffle32`
  --> C:\Users\A\.cargo\registry\src\index.crates.io-6f17d22bba15001f\packed_simd_2-0.3.8\src\codegen\llvm.rs:14:5
   |
14 |     pub fn simd_shuffle32<T, U>(x: T, y: T, idx: [u32; 32]) -> U;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unrecognized platform-specific intrinsic function: `simd_shuffle64`
  --> C:\Users\A\.cargo\registry\src\index.crates.io-6f17d22bba15001f\packed_simd_2-0.3.8\src\codegen\llvm.rs:15:5
   |
15 |     pub fn simd_shuffle64<T, U>(x: T, y: T, idx: [u32; 64]) -> U;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: could not compile `packed_simd_2` (lib) due to 6 previous errors

[glandium]

@AlifianK that's fixed in the latest version of packed_simd, which switched names back(?) from packed_simd_2.

[Mark-Simulacrum]

Should be fixed by #113529 on beta and 1.73 (current nightly).