ICE building chrono

[sanxiyn]

rustc 1.78.0-nightly (c67326b06 2024-03-15)

To reproduce:

git clone https://github.com/chronotope/chrono.git
cd chrono
git checkout 7afc6a2600fea734d134cb595c7249320a5c8695
RUSTFLAGS='-Z codegen-backend=cranelift' cargo +nightly build

The previous commit builds okay.

[bjorn3]

thread 'rustc' panicked at /rustc/c67326b063bd27ed04f306ba2e372cd92e0a8751/compiler/rustc_middle/src/hir/mod.rs:157:84:
index out of bounds: the len is 4005 but the index is 4005
stack backtrace:
[...]
  18:     0x7f72807da3f2 - core::panicking::panic_bounds_check::hd46065b77a69d545
                               at /rustc/c67326b063bd27ed04f306ba2e372cd92e0a8751/library/core/src/panicking.rs:209:5
  19:     0x7f7284be2d6a - rustc_query_impl[5168e86bec57291]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5168e86bec57291]::query_impl::local_def_id_to_hir_id::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d475a138f66122e0]::query::erase::Erased<[u8; 8usize]>>
  20:     0x7f7284ed4ea2 - rustc_query_system[c2679a9664214c38]::query::plumbing::try_execute_query::<rustc_query_impl[5168e86bec57291]::DynamicConfig<rustc_query_system[c2679a9664214c38]::query::caches::VecCache<rustc_span[1de926e68631d1ca]::def_id::LocalDefId, rustc_middle[d475a138f66122e0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[5168e86bec57291]::plumbing::QueryCtxt, true>
  21:     0x7f7284ed3a59 - rustc_query_impl[5168e86bec57291]::query_impl::local_def_id_to_hir_id::get_query_incr::__rust_end_short_backtrace
  22:     0x7f7282856205 - rustc_hir_analysis[b0510b7757423d5d]::collect::type_of::type_of
  23:     0x7f7284ab2062 - rustc_query_impl[5168e86bec57291]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5168e86bec57291]::query_impl::type_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d475a138f66122e0]::query::erase::Erased<[u8; 8usize]>>
  24:     0x7f7284db2df6 - rustc_query_system[c2679a9664214c38]::query::plumbing::try_execute_query::<rustc_query_impl[5168e86bec57291]::DynamicConfig<rustc_query_system[c2679a9664214c38]::query::caches::DefIdCache<rustc_middle[d475a138f66122e0]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[5168e86bec57291]::plumbing::QueryCtxt, true>
  25:     0x7f7284c58bd9 - rustc_query_impl[5168e86bec57291]::query_impl::type_of::get_query_incr::__rust_end_short_backtrace
  26:     0x7f728555665a - <rustc_middle[d475a138f66122e0]::ty::instance::Instance>::ty
  27:     0x7f7276e1a88c - rustc_codegen_cranelift[e5e665717e25ea82]::constant::data_id_for_static
  28:     0x7f7276e188b2 - <rustc_codegen_cranelift[e5e665717e25ea82]::constant::ConstantCx>::finalize
  29:     0x7f7276e21b23 - rustc_codegen_cranelift[e5e665717e25ea82]::driver::aot::module_codegen::{closure#0}
  30:     0x7f7276e20207 - rustc_codegen_cranelift[e5e665717e25ea82]::driver::aot::module_codegen
[...]
query stack during panic:
#0 [local_def_id_to_hir_id] getting HIR ID of `format::strftime::<impl at src/format/strftime.rs:252:1: 252:27>::parse_next_item::D_FMT::{constant#0}`
#1 [type_of] computing type of `format::strftime::<impl at src/format/strftime.rs:252:1: 252:27>::parse_next_item::D_FMT::{constant#0}`
end of query stack

[bjorn3]

Codegening the static in the following is enough to cause this ICE:

const fn no_str() -> Option<Box<str>> {
    None
}

static STATIC_WITH_MAYBE_NESTED_BOX: &Option<Box<str>> = &no_str();

[bjorn3]

https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/cg_clif.20ICE.20with.20static.20and.20nested.20references

[bjorn3]

Should be fixed in the latest version of cg_clif in this repo. Will open a PR to sync it to the rust repo to get the rustup distributed version fixed later today. In the mean time you can download a prebuilt version from https://github.com/rust-lang/rustc_codegen_cranelift/releases/tag/dev

[bjorn3]

The first nightly after rust-lang/rust#122599 merges will have this fix.

[bjorn3]

Should be fixed with the latest nightly.