Start using pattern types in libcore #136006

oli-obk · 2025-01-24T16:24:51Z

blocked on rust-analyzer getting support for computing the right layout for pattern types

cc @Veykril no rush here, as long as we can't replace NonNull, there's no point in doing this change just yet

compiler-errors

Well r=me when/if it does get unblocked.

scottmcm · 2025-01-25T01:41:45Z

library/core/src/num/niche_types.rs

+        #[repr(transparent)]
+        $(#[$m])*
+        #[cfg(not(bootstrap))]
+        $vis struct $name(pattern_type!($int is $low..=$high));


Unsure: at least for the NonZeroBlahInner ones, it'd be nicer if these could just be type $name = pattern_type!($int is $low..=$high);, without the extra wrapper. Is that feasible, or are the trait implementations too far off?

(Relatedly, I'd love to be able to just derive traits on these again, particularly to not have to manually StructuralPartialEq.)

Yea... I wanna get there, but directly using pattern types is not a great experience at present

rustbot · 2025-01-27T09:38:22Z

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

Veykril · 2025-01-27T09:54:06Z

Re rust-analyzer blocker, as it turns out to implement pattern types (to a degree that would unblock this) it comes down to the same architecture changes required as for rust-lang/rust-analyzer#7434 (which I am currently looking into), so that will take a bit.

rustbot · 2025-01-27T15:53:28Z

Some changes occurred to the CTFE machinery

cc @rust-lang/wg-const-eval

Some changes occurred to the CTFE / Miri interpreter

cc @rust-lang/miri

compiler/rustc_const_eval/src/interpret/validity.rs

oli-obk · 2025-06-06T16:22:49Z

Will fix the ICE in #142124

bors · 2025-06-07T03:45:08Z

☔ The latest upstream changes (presumably #142133) made this pull request unmergeable. Please resolve the merge conflicts.

tmiasko · 2025-06-11T10:33:15Z

compiler/rustc_symbol_mangling/src/v0.rs

+            ty::PatternKind::NotNull => {
+                self.tcx.types.unit.print(self)?;
+            }


Pattern types temporarily reusing tuple encoding risk breakage due to symbol conflicts. For example, the following fails to compile with -Csymbol-mangling-version=v0:

#![feature(pattern_types)] #![feature(pattern_type_macro)] use std::hint::black_box; use std::mem::size_of; use std::pat::pattern_type; fn main() { black_box(size_of::<pattern_type!(usize is 0..=1)> as fn() -> usize); black_box(size_of::<(usize, [(); 0], [(); 1])> as fn() -> usize); }

Ah yea, I guess I need to change rustc-demangle first, then update our internal dependency on it, then update what we emit

bors · 2025-06-16T14:48:58Z

☔ The latest upstream changes (presumably #142556) made this pull request unmergeable. Please resolve the merge conflicts.

bors · 2025-07-07T17:47:54Z

☔ The latest upstream changes (presumably #143582) made this pull request unmergeable. Please resolve the merge conflicts.

rustbot · 2025-07-15T08:33:14Z

This PR changes rustc_public

cc @oli-obk, @celinval, @ouz-a

bors · 2025-07-22T22:20:13Z

☔ The latest upstream changes (presumably #144249) made this pull request unmergeable. Please resolve the merge conflicts.

bors · 2025-07-23T09:19:56Z

☔ The latest upstream changes (presumably #143897) made this pull request unmergeable. Please resolve the merge conflicts.

Use `!null` pattern type in libcore

rust-log-analyzer · 2025-07-24T08:13:52Z

The job pr-check-2 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[RUSTC-TIMING] process_spawning test:true 1.282
[RUSTC-TIMING] floats test:true 1.907
[RUSTC-TIMING] num test:true 1.096
[RUSTC-TIMING] type_name_unsized test:true 0.248
error: internal compiler error: /checkout/compiler/rustc_codegen_ssa/src/base.rs:304:14: coerce_unsized_into: invalid coercion pattern_type!(*const alloc::sync::ArcInner<usize> is !null) -> pattern_type!(*const alloc::sync::ArcInner<dyn [Binder { value: Trait(std::any::Any), bound_vars: [] }, Binder { value: AutoTrait(DefId(2:3637 ~ core[0716]::marker::Sync)), bound_vars: [] }, Binder { value: AutoTrait(DefId(2:38218 ~ core[0716]::marker::Send)), bound_vars: [] }] + '{erased}> is !null)


thread 'rustc' panicked at /checkout/compiler/rustc_codegen_ssa/src/base.rs:304:14:
Box<dyn Any>
stack backtrace:
   0:     0x7f898a7bcd82 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h3f25e7a042e0f78f
   1:     0x7f898a80b6f3 - core::fmt::write::h9228492c07172c71
   2:     0x7f898a7b1483 - std::io::Write::write_fmt::hbc89b049541b1f3f
   3:     0x7f898a7bcbd2 - std::sys::backtrace::BacktraceLock::print::h84d9c59f112a45df
   4:     0x7f898a7c07ac - std::panicking::default_hook::{{closure}}::h5230ec8d3834b5dc
   5:     0x7f898a7c05af - std::panicking::default_hook::h82fc2bc32e1ed222
   6:     0x7f8985f58d32 - <alloc[d932a86623700fa6]::boxed::Box<rustc_driver_impl[6bcdcf93142f3bdf]::install_ice_hook::{closure#1}> as core[53647cb28d9a8e2]::ops::function::Fn<(&dyn for<'a, 'b> core[53647cb28d9a8e2]::ops::function::Fn<(&'a std[c965b0aa6c3056df]::panic::PanicHookInfo<'b>,), Output = ()> + core[53647cb28d9a8e2]::marker::Send + core[53647cb28d9a8e2]::marker::Sync, &std[c965b0aa6c3056df]::panic::PanicHookInfo)>>::call
   7:     0x7f898a7c127b - std::panicking::rust_panic_with_hook::h7841a0c9dd31384d
   8:     0x7f898a36e993 - std[c965b0aa6c3056df]::panicking::begin_panic::<rustc_errors[a1f313aa0069ed6d]::ExplicitBug>::{closure#0}
   9:     0x7f898a36e666 - std[c965b0aa6c3056df]::sys::backtrace::__rust_end_short_backtrace::<std[c965b0aa6c3056df]::panicking::begin_panic<rustc_errors[a1f313aa0069ed6d]::ExplicitBug>::{closure#0}, !>
  10:     0x7f8985dc5aa4 - std[c965b0aa6c3056df]::panicking::begin_panic::<rustc_errors[a1f313aa0069ed6d]::ExplicitBug>
  11:     0x7f8985dc5a42 - <rustc_errors[a1f313aa0069ed6d]::diagnostic::BugAbort as rustc_errors[a1f313aa0069ed6d]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7f8989fbec55 - rustc_middle[9f3c98c38c00b5a6]::util::bug::opt_span_bug_fmt::<rustc_span[981f1240f2624e58]::span_encoding::Span>::{closure#0}
  13:     0x7f8989fbd5da - rustc_middle[9f3c98c38c00b5a6]::ty::context::tls::with_opt::<rustc_middle[9f3c98c38c00b5a6]::util::bug::opt_span_bug_fmt<rustc_span[981f1240f2624e58]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x7f8989fbd576 - rustc_middle[9f3c98c38c00b5a6]::ty::context::tls::with_context_opt::<rustc_middle[9f3c98c38c00b5a6]::ty::context::tls::with_opt<rustc_middle[9f3c98c38c00b5a6]::util::bug::opt_span_bug_fmt<rustc_span[981f1240f2624e58]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x7f8985d7f7f2 - rustc_middle[9f3c98c38c00b5a6]::util::bug::bug_fmt
  16:     0x7f898651c6a3 - rustc_codegen_ssa[d27da0192346df8a]::base::coerce_unsized_into::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  17:     0x7f898651c5a4 - rustc_codegen_ssa[d27da0192346df8a]::base::coerce_unsized_into::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  18:     0x7f898651c5a4 - rustc_codegen_ssa[d27da0192346df8a]::base::coerce_unsized_into::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  19:     0x7f898638530a - rustc_codegen_ssa[d27da0192346df8a]::mir::codegen_mir::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  20:     0x7f8986523617 - <rustc_middle[9f3c98c38c00b5a6]::mir::mono::MonoItem as rustc_codegen_ssa[d27da0192346df8a]::mono_item::MonoItemExt>::define::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  21:     0x7f898642aaa2 - rustc_codegen_llvm[d5cdcb2fcf06f31b]::base::compile_codegen_unit::module_codegen
  22:     0x7f898642a3b8 - rustc_codegen_llvm[d5cdcb2fcf06f31b]::base::compile_codegen_unit
  23:     0x7f898651b4ed - rustc_codegen_ssa[d27da0192346df8a]::base::codegen_crate::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::LlvmCodegenBackend>
  24:     0x7f898649bdbf - <rustc_codegen_llvm[d5cdcb2fcf06f31b]::LlvmCodegenBackend as rustc_codegen_ssa[d27da0192346df8a]::traits::backend::CodegenBackend>::codegen_crate
  25:     0x7f898619aa65 - rustc_interface[7d1b1ab6c7a3b353]::passes::start_codegen
  26:     0x7f89861ffd2a - <rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>::codegen_and_build_linker
  27:     0x7f8985e41f6c - <std[c965b0aa6c3056df]::thread::local::LocalKey<core[53647cb28d9a8e2]::cell::Cell<*const ()>>>::with::<rustc_middle[9f3c98c38c00b5a6]::ty::context::tls::enter_context<<rustc_middle[9f3c98c38c00b5a6]::ty::context::GlobalCtxt>::enter<rustc_interface[7d1b1ab6c7a3b353]::passes::create_and_enter_global_ctxt<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>>::{closure#1}, core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>>::{closure#0}, core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>>
  28:     0x7f8985eaa15b - <rustc_middle[9f3c98c38c00b5a6]::ty::context::TyCtxt>::create_global_ctxt::<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_interface[7d1b1ab6c7a3b353]::passes::create_and_enter_global_ctxt<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
  29:     0x7f8985f1d787 - <rustc_interface[7d1b1ab6c7a3b353]::passes::create_and_enter_global_ctxt<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[53647cb28d9a8e2]::ops::function::FnOnce<(&rustc_session[2eee1ba1dc0dbbfa]::session::Session, rustc_middle[9f3c98c38c00b5a6]::ty::context::CurrentGcx, alloc[d932a86623700fa6]::sync::Arc<rustc_data_structures[72bc8994c09e69dc]::jobserver::Proxy>, &std[c965b0aa6c3056df]::sync::once_lock::OnceLock<rustc_middle[9f3c98c38c00b5a6]::ty::context::GlobalCtxt>, &rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_middle[9f3c98c38c00b5a6]::arena::Arena>, &rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_hir[707f209c2f1a5458]::Arena>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  30:     0x7f8985f57b4a - <alloc[d932a86623700fa6]::boxed::Box<dyn for<'a> core[53647cb28d9a8e2]::ops::function::FnOnce<(&'a rustc_session[2eee1ba1dc0dbbfa]::session::Session, rustc_middle[9f3c98c38c00b5a6]::ty::context::CurrentGcx, alloc[d932a86623700fa6]::sync::Arc<rustc_data_structures[72bc8994c09e69dc]::jobserver::Proxy>, &'a std[c965b0aa6c3056df]::sync::once_lock::OnceLock<rustc_middle[9f3c98c38c00b5a6]::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_middle[9f3c98c38c00b5a6]::arena::Arena<'a>>, &'a rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_hir[707f209c2f1a5458]::Arena<'a>>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}), Output = core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>>> as core[53647cb28d9a8e2]::ops::function::FnOnce<(&rustc_session[2eee1ba1dc0dbbfa]::session::Session, rustc_middle[9f3c98c38c00b5a6]::ty::context::CurrentGcx, alloc[d932a86623700fa6]::sync::Arc<rustc_data_structures[72bc8994c09e69dc]::jobserver::Proxy>, &std[c965b0aa6c3056df]::sync::once_lock::OnceLock<rustc_middle[9f3c98c38c00b5a6]::ty::context::GlobalCtxt>, &rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_middle[9f3c98c38c00b5a6]::arena::Arena>, &rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_hir[707f209c2f1a5458]::Arena>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2})>>::call_once
  31:     0x7f8985eefc5a - rustc_interface[7d1b1ab6c7a3b353]::passes::create_and_enter_global_ctxt::<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}>
  32:     0x7f8985e8f643 - rustc_span[981f1240f2624e58]::create_session_globals_then::<(), rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_with_globals<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_pool_with_globals<rustc_interface[7d1b1ab6c7a3b353]::interface::run_compiler<(), rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
  33:     0x7f8985f4b899 - std[c965b0aa6c3056df]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_with_globals<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_pool_with_globals<rustc_interface[7d1b1ab6c7a3b353]::interface::run_compiler<(), rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  34:     0x7f8985e9d6e3 - <<std[c965b0aa6c3056df]::thread::Builder>::spawn_unchecked_<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_with_globals<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_pool_with_globals<rustc_interface[7d1b1ab6c7a3b353]::interface::run_compiler<(), rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[53647cb28d9a8e2]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  35:     0x7f898a7c5907 - std::sys::pal::unix::thread::Thread::new::thread_start::h208e5045c7868bf5
  36:     0x7f898506bac3 - <unknown>
  37:     0x7f89850fd850 - <unknown>
  38:                0x0 - <unknown>

note: using internal features is not supported and expected to cause internal compiler errors when used incorrectly

warning: the ICE couldn't be written to `/checkout/rustc-ice-2025-07-24T08_12_29-55099.txt`: Read-only file system (os error 30)

note: rustc 1.90.0-nightly (e361ea2fc 2025-07-24) running on x86_64-unknown-linux-gnu

note: compiler flags: -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 -C debug-assertions=on -C symbol-mangling-version=legacy -Z unstable-options -Z macro-backtrace -C split-debuginfo=off -C prefer-dynamic -Z validate-mir -Z mir-opt-level=3 -Z inline-mir -Z inline-mir-preserve-debug -Z mir_strip_debuginfo=locals-in-tiny-functions -C link-args=-Wl,-z,origin -C link-args=-Wl,-rpath,$ORIGIN/../lib -C embed-bitcode=yes -Z unstable-options -C force-frame-pointers=non-leaf -Z crate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/") -Z binary-dep-depinfo -Z force-unstable-if-unmarked

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
[RUSTC-TIMING] alloctests test:true 27.687
error: could not compile `alloctests` (test "alloctests")

Caused by:
  process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc /checkout/obj/build/bootstrap/debug/rustc --crate-name alloctests --edition=2021 library/alloctests/tests/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 --warn=unexpected_cfgs --check-cfg 'cfg(no_global_oom_handling)' --check-cfg 'cfg(no_rc)' --check-cfg 'cfg(no_sync)' --check-cfg 'cfg(randomized_layouts)' -C debug-assertions=on --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=c9b269bb57d3027d -C extra-filename=-989d64cf613077a6 --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/release/deps --extern alloctests=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/liballoctests-9307961706c1ee46.rlib --extern rand=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librand-20418ab8b61e09c4.rlib --extern rand_xorshift=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librand_xorshift-9916dc691942d3bf.rlib -Csymbol-mangling-version=legacy '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zvalidate-mir -Zmir-opt-level=3 -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo` (exit status: 101)
warning: build failed, waiting for other jobs to finish...
[RUSTC-TIMING] allocbenches test:true 78.365
error: internal compiler error: /checkout/compiler/rustc_codegen_ssa/src/base.rs:304:14: coerce_unsized_into: invalid coercion pattern_type!(*const [i32; 3_usize] is !null) -> pattern_type!(*const [i32] is !null)


thread 'rustc' panicked at /checkout/compiler/rustc_codegen_ssa/src/base.rs:304:14:
Box<dyn Any>
stack backtrace:
   0:     0x7f93459bcd82 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h3f25e7a042e0f78f
   1:     0x7f9345a0b6f3 - core::fmt::write::h9228492c07172c71
   2:     0x7f93459b1483 - std::io::Write::write_fmt::hbc89b049541b1f3f
   3:     0x7f93459bcbd2 - std::sys::backtrace::BacktraceLock::print::h84d9c59f112a45df
   4:     0x7f93459c07ac - std::panicking::default_hook::{{closure}}::h5230ec8d3834b5dc
   5:     0x7f93459c05af - std::panicking::default_hook::h82fc2bc32e1ed222
   6:     0x7f9341158d32 - <alloc[d932a86623700fa6]::boxed::Box<rustc_driver_impl[6bcdcf93142f3bdf]::install_ice_hook::{closure#1}> as core[53647cb28d9a8e2]::ops::function::Fn<(&dyn for<'a, 'b> core[53647cb28d9a8e2]::ops::function::Fn<(&'a std[c965b0aa6c3056df]::panic::PanicHookInfo<'b>,), Output = ()> + core[53647cb28d9a8e2]::marker::Send + core[53647cb28d9a8e2]::marker::Sync, &std[c965b0aa6c3056df]::panic::PanicHookInfo)>>::call
   7:     0x7f93459c127b - std::panicking::rust_panic_with_hook::h7841a0c9dd31384d
   8:     0x7f934556e993 - std[c965b0aa6c3056df]::panicking::begin_panic::<rustc_errors[a1f313aa0069ed6d]::ExplicitBug>::{closure#0}
   9:     0x7f934556e666 - std[c965b0aa6c3056df]::sys::backtrace::__rust_end_short_backtrace::<std[c965b0aa6c3056df]::panicking::begin_panic<rustc_errors[a1f313aa0069ed6d]::ExplicitBug>::{closure#0}, !>
  10:     0x7f9340fc5aa4 - std[c965b0aa6c3056df]::panicking::begin_panic::<rustc_errors[a1f313aa0069ed6d]::ExplicitBug>
  11:     0x7f9340fc5a42 - <rustc_errors[a1f313aa0069ed6d]::diagnostic::BugAbort as rustc_errors[a1f313aa0069ed6d]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7f93451bec55 - rustc_middle[9f3c98c38c00b5a6]::util::bug::opt_span_bug_fmt::<rustc_span[981f1240f2624e58]::span_encoding::Span>::{closure#0}
  13:     0x7f93451bd5da - rustc_middle[9f3c98c38c00b5a6]::ty::context::tls::with_opt::<rustc_middle[9f3c98c38c00b5a6]::util::bug::opt_span_bug_fmt<rustc_span[981f1240f2624e58]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x7f93451bd576 - rustc_middle[9f3c98c38c00b5a6]::ty::context::tls::with_context_opt::<rustc_middle[9f3c98c38c00b5a6]::ty::context::tls::with_opt<rustc_middle[9f3c98c38c00b5a6]::util::bug::opt_span_bug_fmt<rustc_span[981f1240f2624e58]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x7f9340f7f7f2 - rustc_middle[9f3c98c38c00b5a6]::util::bug::bug_fmt
  16:     0x7f934171c6a3 - rustc_codegen_ssa[d27da0192346df8a]::base::coerce_unsized_into::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  17:     0x7f934171c5a4 - rustc_codegen_ssa[d27da0192346df8a]::base::coerce_unsized_into::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  18:     0x7f934171c5a4 - rustc_codegen_ssa[d27da0192346df8a]::base::coerce_unsized_into::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  19:     0x7f934158530a - rustc_codegen_ssa[d27da0192346df8a]::mir::codegen_mir::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  20:     0x7f9341723617 - <rustc_middle[9f3c98c38c00b5a6]::mir::mono::MonoItem as rustc_codegen_ssa[d27da0192346df8a]::mono_item::MonoItemExt>::define::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::builder::GenericBuilder<rustc_codegen_llvm[d5cdcb2fcf06f31b]::context::FullCx>>
  21:     0x7f934162aaa2 - rustc_codegen_llvm[d5cdcb2fcf06f31b]::base::compile_codegen_unit::module_codegen
  22:     0x7f934162a3b8 - rustc_codegen_llvm[d5cdcb2fcf06f31b]::base::compile_codegen_unit
  23:     0x7f934171b4ed - rustc_codegen_ssa[d27da0192346df8a]::base::codegen_crate::<rustc_codegen_llvm[d5cdcb2fcf06f31b]::LlvmCodegenBackend>
  24:     0x7f934169bdbf - <rustc_codegen_llvm[d5cdcb2fcf06f31b]::LlvmCodegenBackend as rustc_codegen_ssa[d27da0192346df8a]::traits::backend::CodegenBackend>::codegen_crate
  25:     0x7f934139aa65 - rustc_interface[7d1b1ab6c7a3b353]::passes::start_codegen
  26:     0x7f93413ffd2a - <rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>::codegen_and_build_linker
  27:     0x7f9341041f6c - <std[c965b0aa6c3056df]::thread::local::LocalKey<core[53647cb28d9a8e2]::cell::Cell<*const ()>>>::with::<rustc_middle[9f3c98c38c00b5a6]::ty::context::tls::enter_context<<rustc_middle[9f3c98c38c00b5a6]::ty::context::GlobalCtxt>::enter<rustc_interface[7d1b1ab6c7a3b353]::passes::create_and_enter_global_ctxt<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>>::{closure#1}, core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>>::{closure#0}, core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>>
  28:     0x7f93410aa15b - <rustc_middle[9f3c98c38c00b5a6]::ty::context::TyCtxt>::create_global_ctxt::<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_interface[7d1b1ab6c7a3b353]::passes::create_and_enter_global_ctxt<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
  29:     0x7f934111d787 - <rustc_interface[7d1b1ab6c7a3b353]::passes::create_and_enter_global_ctxt<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[53647cb28d9a8e2]::ops::function::FnOnce<(&rustc_session[2eee1ba1dc0dbbfa]::session::Session, rustc_middle[9f3c98c38c00b5a6]::ty::context::CurrentGcx, alloc[d932a86623700fa6]::sync::Arc<rustc_data_structures[72bc8994c09e69dc]::jobserver::Proxy>, &std[c965b0aa6c3056df]::sync::once_lock::OnceLock<rustc_middle[9f3c98c38c00b5a6]::ty::context::GlobalCtxt>, &rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_middle[9f3c98c38c00b5a6]::arena::Arena>, &rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_hir[707f209c2f1a5458]::Arena>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  30:     0x7f9341157b4a - <alloc[d932a86623700fa6]::boxed::Box<dyn for<'a> core[53647cb28d9a8e2]::ops::function::FnOnce<(&'a rustc_session[2eee1ba1dc0dbbfa]::session::Session, rustc_middle[9f3c98c38c00b5a6]::ty::context::CurrentGcx, alloc[d932a86623700fa6]::sync::Arc<rustc_data_structures[72bc8994c09e69dc]::jobserver::Proxy>, &'a std[c965b0aa6c3056df]::sync::once_lock::OnceLock<rustc_middle[9f3c98c38c00b5a6]::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_middle[9f3c98c38c00b5a6]::arena::Arena<'a>>, &'a rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_hir[707f209c2f1a5458]::Arena<'a>>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}), Output = core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>>> as core[53647cb28d9a8e2]::ops::function::FnOnce<(&rustc_session[2eee1ba1dc0dbbfa]::session::Session, rustc_middle[9f3c98c38c00b5a6]::ty::context::CurrentGcx, alloc[d932a86623700fa6]::sync::Arc<rustc_data_structures[72bc8994c09e69dc]::jobserver::Proxy>, &std[c965b0aa6c3056df]::sync::once_lock::OnceLock<rustc_middle[9f3c98c38c00b5a6]::ty::context::GlobalCtxt>, &rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_middle[9f3c98c38c00b5a6]::arena::Arena>, &rustc_data_structures[72bc8994c09e69dc]::sync::worker_local::WorkerLocal<rustc_hir[707f209c2f1a5458]::Arena>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2})>>::call_once
  31:     0x7f93410efc5a - rustc_interface[7d1b1ab6c7a3b353]::passes::create_and_enter_global_ctxt::<core[53647cb28d9a8e2]::option::Option<rustc_interface[7d1b1ab6c7a3b353]::queries::Linker>, rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}::{closure#2}>
  32:     0x7f934108f643 - rustc_span[981f1240f2624e58]::create_session_globals_then::<(), rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_with_globals<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_pool_with_globals<rustc_interface[7d1b1ab6c7a3b353]::interface::run_compiler<(), rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
  33:     0x7f934114b899 - std[c965b0aa6c3056df]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_with_globals<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_pool_with_globals<rustc_interface[7d1b1ab6c7a3b353]::interface::run_compiler<(), rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  34:     0x7f934109d6e3 - <<std[c965b0aa6c3056df]::thread::Builder>::spawn_unchecked_<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_with_globals<rustc_interface[7d1b1ab6c7a3b353]::util::run_in_thread_pool_with_globals<rustc_interface[7d1b1ab6c7a3b353]::interface::run_compiler<(), rustc_driver_impl[6bcdcf93142f3bdf]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[53647cb28d9a8e2]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  35:     0x7f93459c5907 - std::sys::pal::unix::thread::Thread::new::thread_start::h208e5045c7868bf5
  36:     0x7f934026bac3 - <unknown>
  37:     0x7f93402fd850 - <unknown>
  38:                0x0 - <unknown>

note: using internal features is not supported and expected to cause internal compiler errors when used incorrectly

warning: the ICE couldn't be written to `/checkout/rustc-ice-2025-07-24T08_11_16-54891.txt`: Read-only file system (os error 30)

note: rustc 1.90.0-nightly (e361ea2fc 2025-07-24) running on x86_64-unknown-linux-gnu

note: compiler flags: -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 -C debug-assertions=on -C symbol-mangling-version=legacy -Z unstable-options -Z macro-backtrace -C split-debuginfo=off -C prefer-dynamic -Z validate-mir -Z mir-opt-level=3 -Z inline-mir -Z inline-mir-preserve-debug -Z mir_strip_debuginfo=locals-in-tiny-functions -C link-args=-Wl,-z,origin -C link-args=-Wl,-rpath,$ORIGIN/../lib -C embed-bitcode=yes -Z unstable-options -C force-frame-pointers=non-leaf -Z crate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/") -Z binary-dep-depinfo -Z force-unstable-if-unmarked

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
end of query stack
[RUSTC-TIMING] coretests test:true 114.234
error: could not compile `coretests` (test "coretests")

Caused by:
  process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc /checkout/obj/build/bootstrap/debug/rustc --crate-name coretests --edition=2024 library/coretests/tests/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no -C codegen-units=1 --warn=unexpected_cfgs --check-cfg 'cfg(target_has_reliable_f16)' --check-cfg 'cfg(target_has_reliable_f16_math)' --check-cfg 'cfg(target_has_reliable_f128)' --check-cfg 'cfg(target_has_reliable_f128_math)' -C debug-assertions=on --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=4112b08bb07295ef -C extra-filename=-cb463b5f5ba896ea --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/release/deps --extern coretests=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcoretests-c118da5c8ee587a2.rlib --extern rand=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librand-20418ab8b61e09c4.rlib --extern rand_xorshift=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librand_xorshift-9916dc691942d3bf.rlib -Csymbol-mangling-version=legacy '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zvalidate-mir -Zmir-opt-level=3 -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Alinker-messages -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Z binary-dep-depinfo` (exit status: 101)
[RUSTC-TIMING] alloctests test:true 69.232
Build completed unsuccessfully in 0:04:05
  local time: Thu Jul 24 08:13:42 UTC 2025
  network time: Thu, 24 Jul 2025 08:13:42 GMT
##[error]Process completed with exit code 1.

bors · 2025-08-03T03:53:49Z

☔ The latest upstream changes (presumably #144814) made this pull request unmergeable. Please resolve the merge conflicts.

rustbot assigned ibraheemdev Jan 24, 2025

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rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Jan 24, 2025

oli-obk added S-blocked Status: Blocked on something else such as an RFC or other implementation work. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jan 24, 2025

oli-obk unassigned ibraheemdev Jan 24, 2025