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

bors · 2025-05-10T21:10:21Z

☔ The latest upstream changes (presumably #140895) made this pull request unmergeable. Please resolve the merge conflicts.

compiler/rustc_const_eval/src/interpret/place.rs

src/tools/miri/src/borrow_tracker/stacked_borrows/mod.rs

bors · 2025-06-04T03:02:47Z

☔ The latest upstream changes (presumably #141984) made this pull request unmergeable. Please resolve the merge conflicts.

compiler/rustc_const_eval/src/interpret/cast.rs

compiler/rustc_const_eval/src/interpret/call.rs

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.

Use `!null` pattern type in libcore

rust-log-analyzer · 2025-06-11T09:23:51Z

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

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

[RUSTC-TIMING] seq_compare test:true 0.508
[RUSTC-TIMING] thread test:true 0.776
[RUSTC-TIMING] slice_from_array_issue_113238 test:true 0.207
[RUSTC-TIMING] builtin_clone test:true 0.289
error: internal compiler error: /checkout/compiler/rustc_codegen_ssa/src/base.rs:329:14: 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(2:3638 ~ core[f050]::marker::Sync)), bound_vars: [] }, Binder { value: AutoTrait(DefId(2:38155 ~ core[f050]::marker::Send)), bound_vars: [] }] + '{erased}> is !null)


thread 'rustc' panicked at /checkout/compiler/rustc_codegen_ssa/src/base.rs:329:14:
Box<dyn Any>
stack backtrace:
   0:     0x7f858d9fe822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h6bed9dc66a5cec52
   1:     0x7f858da4b0c3 - core::fmt::write::h7d74dd6e449cae1f
   2:     0x7f858d9f3333 - std::io::Write::write_fmt::h68b3bc9d54a39d7f
   3:     0x7f858d9fe672 - std::sys::backtrace::BacktraceLock::print::h6b5cffc33d0e9592
   4:     0x7f858da0234c - std::panicking::default_hook::{{closure}}::h5fc51e281b0877ca
   5:     0x7f858da0214f - std::panicking::default_hook::h03c499ee84a534f3
   6:     0x7f858943d902 - <alloc[fd9347d1b2560651]::boxed::Box<rustc_driver_impl[b7da9f8e34b982]::install_ice_hook::{closure#1}> as core[bdde32e857371a49]::ops::function::Fn<(&dyn for<'a, 'b> core[bdde32e857371a49]::ops::function::Fn<(&'a std[4ece947bc34e96db]::panic::PanicHookInfo<'b>,), Output = ()> + core[bdde32e857371a49]::marker::Sync + core[bdde32e857371a49]::marker::Send, &std[4ece947bc34e96db]::panic::PanicHookInfo)>>::call
   7:     0x7f858da02e33 - std::panicking::rust_panic_with_hook::ha891520ba817caf1
   8:     0x7f858d5d20f3 - std[4ece947bc34e96db]::panicking::begin_panic::<rustc_errors[a6962c0bf3ccd8ef]::ExplicitBug>::{closure#0}
   9:     0x7f858d5d1ba6 - std[4ece947bc34e96db]::sys::backtrace::__rust_end_short_backtrace::<std[4ece947bc34e96db]::panicking::begin_panic<rustc_errors[a6962c0bf3ccd8ef]::ExplicitBug>::{closure#0}, !>
  10:     0x7f8589333053 - std[4ece947bc34e96db]::panicking::begin_panic::<rustc_errors[a6962c0bf3ccd8ef]::ExplicitBug>
  11:     0x7f8589333112 - <rustc_errors[a6962c0bf3ccd8ef]::diagnostic::BugAbort as rustc_errors[a6962c0bf3ccd8ef]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7f858d412c05 - rustc_middle[2f5e5c5bfeb207fc]::util::bug::opt_span_bug_fmt::<rustc_span[1765e2c1b3349ba9]::span_encoding::Span>::{closure#0}
  13:     0x7f858d41286a - rustc_middle[2f5e5c5bfeb207fc]::ty::context::tls::with_opt::<rustc_middle[2f5e5c5bfeb207fc]::util::bug::opt_span_bug_fmt<rustc_span[1765e2c1b3349ba9]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x7f858d412806 - rustc_middle[2f5e5c5bfeb207fc]::ty::context::tls::with_context_opt::<rustc_middle[2f5e5c5bfeb207fc]::ty::context::tls::with_opt<rustc_middle[2f5e5c5bfeb207fc]::util::bug::opt_span_bug_fmt<rustc_span[1765e2c1b3349ba9]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x7f858931f582 - rustc_middle[2f5e5c5bfeb207fc]::util::bug::bug_fmt
  16:     0x7f858991179e - rustc_codegen_ssa[6ddf39060c892d4c]::base::coerce_unsized_into::<rustc_codegen_llvm[eacd75f00ffcf1d6]::builder::GenericBuilder<rustc_codegen_llvm[eacd75f00ffcf1d6]::context::FullCx>>
  17:     0x7f85899116d4 - rustc_codegen_ssa[6ddf39060c892d4c]::base::coerce_unsized_into::<rustc_codegen_llvm[eacd75f00ffcf1d6]::builder::GenericBuilder<rustc_codegen_llvm[eacd75f00ffcf1d6]::context::FullCx>>
  18:     0x7f85899116d4 - rustc_codegen_ssa[6ddf39060c892d4c]::base::coerce_unsized_into::<rustc_codegen_llvm[eacd75f00ffcf1d6]::builder::GenericBuilder<rustc_codegen_llvm[eacd75f00ffcf1d6]::context::FullCx>>
  19:     0x7f8589a105a7 - rustc_codegen_ssa[6ddf39060c892d4c]::mir::codegen_mir::<rustc_codegen_llvm[eacd75f00ffcf1d6]::builder::GenericBuilder<rustc_codegen_llvm[eacd75f00ffcf1d6]::context::FullCx>>
---
  25:     0x7f858995fcfd - <rustc_codegen_llvm[eacd75f00ffcf1d6]::LlvmCodegenBackend as rustc_codegen_ssa[6ddf39060c892d4c]::traits::backend::CodegenBackend>::codegen_crate
  26:     0x7f858972cf1f - <rustc_session[a4ee9cd8d7d1c069]::session::Session>::time::<alloc[fd9347d1b2560651]::boxed::Box<dyn core[bdde32e857371a49]::any::Any>, rustc_interface[257343c8d1a97383]::passes::start_codegen::{closure#0}>
  27:     0x7f85896cb180 - rustc_interface[257343c8d1a97383]::passes::start_codegen
  28:     0x7f8589744462 - <rustc_interface[257343c8d1a97383]::queries::Linker>::codegen_and_build_linker
  29:     0x7f85893a38ab - <std[4ece947bc34e96db]::thread::local::LocalKey<core[bdde32e857371a49]::cell::Cell<*const ()>>>::with::<rustc_middle[2f5e5c5bfeb207fc]::ty::context::tls::enter_context<<rustc_middle[2f5e5c5bfeb207fc]::ty::context::GlobalCtxt>::enter<rustc_interface[257343c8d1a97383]::passes::create_and_enter_global_ctxt<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>>::{closure#1}, core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>>::{closure#0}, core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>>
  30:     0x7f858946f3e4 - <rustc_middle[2f5e5c5bfeb207fc]::ty::context::TyCtxt>::create_global_ctxt::<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_interface[257343c8d1a97383]::passes::create_and_enter_global_ctxt<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
  31:     0x7f85893d56f5 - <rustc_interface[257343c8d1a97383]::passes::create_and_enter_global_ctxt<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[bdde32e857371a49]::ops::function::FnOnce<(&rustc_session[a4ee9cd8d7d1c069]::session::Session, rustc_middle[2f5e5c5bfeb207fc]::ty::context::CurrentGcx, alloc[fd9347d1b2560651]::sync::Arc<rustc_data_structures[adc595eda5ea087d]::jobserver::Proxy>, &std[4ece947bc34e96db]::sync::once_lock::OnceLock<rustc_middle[2f5e5c5bfeb207fc]::ty::context::GlobalCtxt>, &rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_middle[2f5e5c5bfeb207fc]::arena::Arena>, &rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_hir[6a946604dc3ce3e0]::Arena>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  32:     0x7f858943d5e6 - <alloc[fd9347d1b2560651]::boxed::Box<dyn for<'a> core[bdde32e857371a49]::ops::function::FnOnce<(&'a rustc_session[a4ee9cd8d7d1c069]::session::Session, rustc_middle[2f5e5c5bfeb207fc]::ty::context::CurrentGcx, alloc[fd9347d1b2560651]::sync::Arc<rustc_data_structures[adc595eda5ea087d]::jobserver::Proxy>, &'a std[4ece947bc34e96db]::sync::once_lock::OnceLock<rustc_middle[2f5e5c5bfeb207fc]::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_middle[2f5e5c5bfeb207fc]::arena::Arena<'a>>, &'a rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_hir[6a946604dc3ce3e0]::Arena<'a>>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}), Output = core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>>> as core[bdde32e857371a49]::ops::function::FnOnce<(&rustc_session[a4ee9cd8d7d1c069]::session::Session, rustc_middle[2f5e5c5bfeb207fc]::ty::context::CurrentGcx, alloc[fd9347d1b2560651]::sync::Arc<rustc_data_structures[adc595eda5ea087d]::jobserver::Proxy>, &std[4ece947bc34e96db]::sync::once_lock::OnceLock<rustc_middle[2f5e5c5bfeb207fc]::ty::context::GlobalCtxt>, &rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_middle[2f5e5c5bfeb207fc]::arena::Arena>, &rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_hir[6a946604dc3ce3e0]::Arena>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2})>>::call_once
  33:     0x7f85893b44aa - rustc_interface[257343c8d1a97383]::passes::create_and_enter_global_ctxt::<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}>
  34:     0x7f85893d8a11 - rustc_span[1765e2c1b3349ba9]::create_session_globals_then::<(), rustc_interface[257343c8d1a97383]::util::run_in_thread_with_globals<rustc_interface[257343c8d1a97383]::util::run_in_thread_pool_with_globals<rustc_interface[257343c8d1a97383]::interface::run_compiler<(), rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
  35:     0x7f85893aeda9 - std[4ece947bc34e96db]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[257343c8d1a97383]::util::run_in_thread_with_globals<rustc_interface[257343c8d1a97383]::util::run_in_thread_pool_with_globals<rustc_interface[257343c8d1a97383]::interface::run_compiler<(), rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  36:     0x7f85893e5a63 - <<std[4ece947bc34e96db]::thread::Builder>::spawn_unchecked_<rustc_interface[257343c8d1a97383]::util::run_in_thread_with_globals<rustc_interface[257343c8d1a97383]::util::run_in_thread_pool_with_globals<rustc_interface[257343c8d1a97383]::interface::run_compiler<(), rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[bdde32e857371a49]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  37:     0x7f858da05e7b - std::sys::pal::unix::thread::Thread::new::thread_start::hd325dd57d8c72c6b
  38:     0x7f858866bac3 - <unknown>
  39:     0x7f85886fd850 - <unknown>
  40:                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-2025-06-11T09_22_17-48210.txt`: Read-only file system (os error 30)

note: rustc 1.89.0-nightly (50bc6213c 2025-06-11) 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 28.094
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=9ae8c3224a5777f1 -C extra-filename=-8f391857e2b940aa --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-e8013ad64ddaacd5.rlib --extern rand=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librand-bab34b197d36432c.rlib --extern rand_xorshift=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librand_xorshift-481590750b037c44.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] corebenches test:true 73.837
[RUSTC-TIMING] sync test:true 33.651
error: internal compiler error: /checkout/compiler/rustc_codegen_ssa/src/base.rs:329:14: 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:329:14:
Box<dyn Any>
stack backtrace:
   0:     0x7f29a63fe822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h6bed9dc66a5cec52
   1:     0x7f29a644b0c3 - core::fmt::write::h7d74dd6e449cae1f
   2:     0x7f29a63f3333 - std::io::Write::write_fmt::h68b3bc9d54a39d7f
   3:     0x7f29a63fe672 - std::sys::backtrace::BacktraceLock::print::h6b5cffc33d0e9592
   4:     0x7f29a640234c - std::panicking::default_hook::{{closure}}::h5fc51e281b0877ca
   5:     0x7f29a640214f - std::panicking::default_hook::h03c499ee84a534f3
   6:     0x7f29a1e3d902 - <alloc[fd9347d1b2560651]::boxed::Box<rustc_driver_impl[b7da9f8e34b982]::install_ice_hook::{closure#1}> as core[bdde32e857371a49]::ops::function::Fn<(&dyn for<'a, 'b> core[bdde32e857371a49]::ops::function::Fn<(&'a std[4ece947bc34e96db]::panic::PanicHookInfo<'b>,), Output = ()> + core[bdde32e857371a49]::marker::Sync + core[bdde32e857371a49]::marker::Send, &std[4ece947bc34e96db]::panic::PanicHookInfo)>>::call
   7:     0x7f29a6402e33 - std::panicking::rust_panic_with_hook::ha891520ba817caf1
   8:     0x7f29a5fd20f3 - std[4ece947bc34e96db]::panicking::begin_panic::<rustc_errors[a6962c0bf3ccd8ef]::ExplicitBug>::{closure#0}
   9:     0x7f29a5fd1ba6 - std[4ece947bc34e96db]::sys::backtrace::__rust_end_short_backtrace::<std[4ece947bc34e96db]::panicking::begin_panic<rustc_errors[a6962c0bf3ccd8ef]::ExplicitBug>::{closure#0}, !>
  10:     0x7f29a1d33053 - std[4ece947bc34e96db]::panicking::begin_panic::<rustc_errors[a6962c0bf3ccd8ef]::ExplicitBug>
  11:     0x7f29a1d33112 - <rustc_errors[a6962c0bf3ccd8ef]::diagnostic::BugAbort as rustc_errors[a6962c0bf3ccd8ef]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7f29a5e12c05 - rustc_middle[2f5e5c5bfeb207fc]::util::bug::opt_span_bug_fmt::<rustc_span[1765e2c1b3349ba9]::span_encoding::Span>::{closure#0}
  13:     0x7f29a5e1286a - rustc_middle[2f5e5c5bfeb207fc]::ty::context::tls::with_opt::<rustc_middle[2f5e5c5bfeb207fc]::util::bug::opt_span_bug_fmt<rustc_span[1765e2c1b3349ba9]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x7f29a5e12806 - rustc_middle[2f5e5c5bfeb207fc]::ty::context::tls::with_context_opt::<rustc_middle[2f5e5c5bfeb207fc]::ty::context::tls::with_opt<rustc_middle[2f5e5c5bfeb207fc]::util::bug::opt_span_bug_fmt<rustc_span[1765e2c1b3349ba9]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x7f29a1d1f582 - rustc_middle[2f5e5c5bfeb207fc]::util::bug::bug_fmt
  16:     0x7f29a231179e - rustc_codegen_ssa[6ddf39060c892d4c]::base::coerce_unsized_into::<rustc_codegen_llvm[eacd75f00ffcf1d6]::builder::GenericBuilder<rustc_codegen_llvm[eacd75f00ffcf1d6]::context::FullCx>>
  17:     0x7f29a23116d4 - rustc_codegen_ssa[6ddf39060c892d4c]::base::coerce_unsized_into::<rustc_codegen_llvm[eacd75f00ffcf1d6]::builder::GenericBuilder<rustc_codegen_llvm[eacd75f00ffcf1d6]::context::FullCx>>
  18:     0x7f29a23116d4 - rustc_codegen_ssa[6ddf39060c892d4c]::base::coerce_unsized_into::<rustc_codegen_llvm[eacd75f00ffcf1d6]::builder::GenericBuilder<rustc_codegen_llvm[eacd75f00ffcf1d6]::context::FullCx>>
  19:     0x7f29a24105a7 - rustc_codegen_ssa[6ddf39060c892d4c]::mir::codegen_mir::<rustc_codegen_llvm[eacd75f00ffcf1d6]::builder::GenericBuilder<rustc_codegen_llvm[eacd75f00ffcf1d6]::context::FullCx>>
---
  25:     0x7f29a235fcfd - <rustc_codegen_llvm[eacd75f00ffcf1d6]::LlvmCodegenBackend as rustc_codegen_ssa[6ddf39060c892d4c]::traits::backend::CodegenBackend>::codegen_crate
  26:     0x7f29a212cf1f - <rustc_session[a4ee9cd8d7d1c069]::session::Session>::time::<alloc[fd9347d1b2560651]::boxed::Box<dyn core[bdde32e857371a49]::any::Any>, rustc_interface[257343c8d1a97383]::passes::start_codegen::{closure#0}>
  27:     0x7f29a20cb180 - rustc_interface[257343c8d1a97383]::passes::start_codegen
  28:     0x7f29a2144462 - <rustc_interface[257343c8d1a97383]::queries::Linker>::codegen_and_build_linker
  29:     0x7f29a1da38ab - <std[4ece947bc34e96db]::thread::local::LocalKey<core[bdde32e857371a49]::cell::Cell<*const ()>>>::with::<rustc_middle[2f5e5c5bfeb207fc]::ty::context::tls::enter_context<<rustc_middle[2f5e5c5bfeb207fc]::ty::context::GlobalCtxt>::enter<rustc_interface[257343c8d1a97383]::passes::create_and_enter_global_ctxt<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}, core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>>::{closure#1}, core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>>::{closure#0}, core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>>
  30:     0x7f29a1e6f3e4 - <rustc_middle[2f5e5c5bfeb207fc]::ty::context::TyCtxt>::create_global_ctxt::<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_interface[257343c8d1a97383]::passes::create_and_enter_global_ctxt<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}>
  31:     0x7f29a1dd56f5 - <rustc_interface[257343c8d1a97383]::passes::create_and_enter_global_ctxt<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[bdde32e857371a49]::ops::function::FnOnce<(&rustc_session[a4ee9cd8d7d1c069]::session::Session, rustc_middle[2f5e5c5bfeb207fc]::ty::context::CurrentGcx, alloc[fd9347d1b2560651]::sync::Arc<rustc_data_structures[adc595eda5ea087d]::jobserver::Proxy>, &std[4ece947bc34e96db]::sync::once_lock::OnceLock<rustc_middle[2f5e5c5bfeb207fc]::ty::context::GlobalCtxt>, &rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_middle[2f5e5c5bfeb207fc]::arena::Arena>, &rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_hir[6a946604dc3ce3e0]::Arena>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  32:     0x7f29a1e3d5e6 - <alloc[fd9347d1b2560651]::boxed::Box<dyn for<'a> core[bdde32e857371a49]::ops::function::FnOnce<(&'a rustc_session[a4ee9cd8d7d1c069]::session::Session, rustc_middle[2f5e5c5bfeb207fc]::ty::context::CurrentGcx, alloc[fd9347d1b2560651]::sync::Arc<rustc_data_structures[adc595eda5ea087d]::jobserver::Proxy>, &'a std[4ece947bc34e96db]::sync::once_lock::OnceLock<rustc_middle[2f5e5c5bfeb207fc]::ty::context::GlobalCtxt<'a>>, &'a rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_middle[2f5e5c5bfeb207fc]::arena::Arena<'a>>, &'a rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_hir[6a946604dc3ce3e0]::Arena<'a>>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}), Output = core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>>> as core[bdde32e857371a49]::ops::function::FnOnce<(&rustc_session[a4ee9cd8d7d1c069]::session::Session, rustc_middle[2f5e5c5bfeb207fc]::ty::context::CurrentGcx, alloc[fd9347d1b2560651]::sync::Arc<rustc_data_structures[adc595eda5ea087d]::jobserver::Proxy>, &std[4ece947bc34e96db]::sync::once_lock::OnceLock<rustc_middle[2f5e5c5bfeb207fc]::ty::context::GlobalCtxt>, &rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_middle[2f5e5c5bfeb207fc]::arena::Arena>, &rustc_data_structures[adc595eda5ea087d]::sync::worker_local::WorkerLocal<rustc_hir[6a946604dc3ce3e0]::Arena>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2})>>::call_once
  33:     0x7f29a1db44aa - rustc_interface[257343c8d1a97383]::passes::create_and_enter_global_ctxt::<core[bdde32e857371a49]::option::Option<rustc_interface[257343c8d1a97383]::queries::Linker>, rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}::{closure#2}>
  34:     0x7f29a1dd8a11 - rustc_span[1765e2c1b3349ba9]::create_session_globals_then::<(), rustc_interface[257343c8d1a97383]::util::run_in_thread_with_globals<rustc_interface[257343c8d1a97383]::util::run_in_thread_pool_with_globals<rustc_interface[257343c8d1a97383]::interface::run_compiler<(), rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}::{closure#0}>
  35:     0x7f29a1daeda9 - std[4ece947bc34e96db]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[257343c8d1a97383]::util::run_in_thread_with_globals<rustc_interface[257343c8d1a97383]::util::run_in_thread_pool_with_globals<rustc_interface[257343c8d1a97383]::interface::run_compiler<(), rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  36:     0x7f29a1de5a63 - <<std[4ece947bc34e96db]::thread::Builder>::spawn_unchecked_<rustc_interface[257343c8d1a97383]::util::run_in_thread_with_globals<rustc_interface[257343c8d1a97383]::util::run_in_thread_pool_with_globals<rustc_interface[257343c8d1a97383]::interface::run_compiler<(), rustc_driver_impl[b7da9f8e34b982]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[bdde32e857371a49]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  37:     0x7f29a6405e7b - std::sys::pal::unix::thread::Thread::new::thread_start::hd325dd57d8c72c6b
  38:     0x7f29a106bac3 - <unknown>
  39:     0x7f29a10fd850 - <unknown>
  40:                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-2025-06-11T09_22_06-48050.txt`: Read-only file system (os error 30)

note: rustc 1.89.0-nightly (50bc6213c 2025-06-11) 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 91.561
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=be4de002eb3b4c89 -C extra-filename=-4ab46dfdeca47260 --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-90d64acab960b8d3.rlib --extern rand=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librand-bab34b197d36432c.rlib --extern rand_xorshift=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librand_xorshift-481590750b037c44.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)
Build completed unsuccessfully in 0:02:54
  local time: Wed Jun 11 09:23:38 UTC 2025
  network time: Wed, 11 Jun 2025 09:23:38 GMT
##[error]Process completed with exit code 1.
Post job cleanup.

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

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Test validity of pattern types #136145

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Add NonNull pattern types #142339

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oli-obk added 5 commits June 11, 2025 08:08

Add not-null pointer patterns to pattern types

6d08c10

Implement wide not-null pointer patterns

abe1185

Allow unsizing pattern types with pointer base

57dc73a

Start using pattern types in libcore

926b32c

Use !null pattern type in libcore

b329461

Use `!null` pattern type in libcore

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Add proper name mangling for pattern types #142401

Open

Start using pattern types in libcore #136006

Are you sure you want to change the base?

Start using pattern types in libcore #136006

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oli-obk commented Jan 24, 2025 •

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