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nyurik
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Aug 2, 2024
…res, r=oli-obk Tell users not to file a bug when using internal library features Actually fixes rust-lang#97501. I don't think we should suppress the suggestion to add `#![feature(..)]`, though I guess I could be convinced otherwise. r? `@Nilstrieb` cc `@RalfJung` Didn't add a test b/c I don't think we test this for lang features either, but I can confirm it does work. ``` warning: the feature `core_intrinsics` is internal to the compiler or standard library --> /home/michael/test.rs:1:12 | 1 | #![feature(core_intrinsics)] | ^^^^^^^^^^^^^^^ | = note: using it is strongly discouraged = note: `#[warn(internal_features)]` on by default thread 'rustc' panicked at compiler/rustc_mir_transform/src/validate.rs:94:25: broken MIR in Item(DefId(0:6 ~ test[42db]::{impl#0}::add)) (after phase change to runtime-optimized) at bb0[0]: Cannot perform arithmetic Add on type WrapInt8 stack backtrace: 0: begin_panic_handler at ./library/std/src/panicking.rs:665:5 1: panic_fmt at ./library/core/src/panicking.rs:74:14 2: fail<alloc::string::String> at ./compiler/rustc_mir_transform/src/validate.rs:146:9 3: run_pass at ./compiler/rustc_mir_transform/src/validate.rs:94:13 4: validate_body at ./compiler/rustc_mir_transform/src/pass_manager.rs:193:5 5: run_passes_inner at ./compiler/rustc_mir_transform/src/pass_manager.rs:176:13 6: rustc_mir_transform::pass_manager::run_passes at ./compiler/rustc_mir_transform/src/pass_manager.rs:87:5 7: run_optimization_passes at ./compiler/rustc_mir_transform/src/lib.rs:561:5 8: inner_optimized_mir at ./compiler/rustc_mir_transform/src/lib.rs:667:5 9: optimized_mir at ./compiler/rustc_mir_transform/src/lib.rs:630:21 10: {closure#0} at ./compiler/rustc_query_impl/src/plumbing.rs:285:13 [... omitted 22 frames ...] 11: query_get_at<rustc_query_system::query::caches::DefIdCache<rustc_middle::query::erase::Erased<[u8; 8]>>> at ./compiler/rustc_middle/src/query/plumbing.rs:145:17 12: instance_mir 13: collect_items_of_instance at ./compiler/rustc_monomorphize/src/collector.rs:1203:16 14: {closure#0} at ./compiler/rustc_monomorphize/src/collector.rs:447:17 15: maybe_grow<(), rustc_monomorphize::collector::collect_items_rec::{closure_env#0}> at /home/michael/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9 16: ensure_sufficient_stack<(), rustc_monomorphize::collector::collect_items_rec::{closure_env#0}> at ./compiler/rustc_data_structures/src/stack.rs:17:5 17: collect_items_rec at ./compiler/rustc_monomorphize/src/collector.rs:446:13 18: collect_items_rec at ./compiler/rustc_monomorphize/src/collector.rs:526:13 19: {closure#0} at ./compiler/rustc_monomorphize/src/collector.rs:1597:17 20: {closure#0}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}> at ./compiler/rustc_data_structures/src/sync/parallel.rs:182:34 21: call_once<(), rustc_data_structures::sync::parallel::enabled::par_for_each_in::{closure#0}::{closure#0}::{closure_env#0}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}>> at ./library/core/src/panic/unwind_safe.rs:272:9 22: do_call<core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::enabled::par_for_each_in::{closure#0}::{closure#0}::{closure_env#0}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}>>, ()> at ./library/std/src/panicking.rs:557:40 23: try<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures::sync::parallel::enabled::par_for_each_in::{closure#0}::{closure#0}::{closure_env#0}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}>>> at ./library/std/src/panicking.rs:521:19 24: run<(), rustc_data_structures::sync::parallel::enabled::par_for_each_in::{closure#0}::{closure#1}::{closure_env#0}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}>> at ./compiler/rustc_data_structures/src/sync/parallel.rs:28:9 25: {closure#1}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}> at ./compiler/rustc_data_structures/src/sync/parallel.rs:186:21 26: {closure#0}<rustc_middle::mir::mono::MonoItem, rustc_data_structures::sync::parallel::enabled::par_for_each_in::{closure#0}::{closure_env#1}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}>> at ./library/core/src/iter/traits/iterator.rs:815:29 27: fold<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global, (), core::iter::traits::iterator::Iterator::for_each::call::{closure_env#0}<rustc_middle::mir::mono::MonoItem, rustc_data_structures::sync::parallel::enabled::par_for_each_in::{closure#0}::{closure_env#1}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}>>> at ./library/alloc/src/vec/into_iter.rs:317:25 28: for_each<alloc::vec::into_iter::IntoIter<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_data_structures::sync::parallel::enabled::par_for_each_in::{closure#0}::{closure_env#1}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}>> at ./library/core/src/iter/traits/iterator.rs:818:9 29: {closure#0}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}> at ./compiler/rustc_data_structures/src/sync/parallel.rs:185:17 30: parallel_guard<(), rustc_data_structures::sync::parallel::enabled::par_for_each_in::{closure_env#0}<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}>> at ./compiler/rustc_data_structures/src/sync/parallel.rs:44:15 31: par_for_each_in<rustc_middle::mir::mono::MonoItem, alloc::vec::Vec<rustc_middle::mir::mono::MonoItem, alloc::alloc::Global>, rustc_monomorphize::collector::collect_crate_mono_items::{closure#1}::{closure_env#0}> at ./compiler/rustc_data_structures/src/sync/parallel.rs:178:9 32: {closure#1} at ./compiler/rustc_monomorphize/src/collector.rs:1595:13 33: run<(), rustc_monomorphize::collector::collect_crate_mono_items::{closure_env#1}> at ./compiler/rustc_data_structures/src/profiling.rs:754:9 34: time<(), rustc_monomorphize::collector::collect_crate_mono_items::{closure_env#1}> at ./compiler/rustc_session/src/utils.rs:16:9 35: collect_crate_mono_items at ./compiler/rustc_monomorphize/src/collector.rs:1594:9 36: collect_and_partition_mono_items at ./compiler/rustc_monomorphize/src/partitioning.rs:1124:30 37: {closure#0} at ./compiler/rustc_query_impl/src/plumbing.rs:281:9 [... omitted 22 frames ...] 38: query_get_at<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 24]>>> at ./compiler/rustc_middle/src/query/plumbing.rs:145:17 39: collect_and_partition_mono_items at ./compiler/rustc_middle/src/query/plumbing.rs:423:31 40: collect_and_partition_mono_items at ./compiler/rustc_middle/src/query/plumbing.rs:414:17 41: codegen_crate<rustc_codegen_llvm::LlvmCodegenBackend> at ./compiler/rustc_codegen_ssa/src/base.rs:596:25 42: codegen_crate at ./compiler/rustc_codegen_llvm/src/lib.rs:361:18 43: {closure#0} at ./compiler/rustc_interface/src/passes.rs:1027:9 44: run<alloc::boxed::Box<dyn core::any::Any, alloc::alloc::Global>, rustc_interface::passes::start_codegen::{closure_env#0}> at ./compiler/rustc_data_structures/src/profiling.rs:754:9 45: time<alloc::boxed::Box<dyn core::any::Any, alloc::alloc::Global>, rustc_interface::passes::start_codegen::{closure_env#0}> at ./compiler/rustc_session/src/utils.rs:16:9 46: start_codegen at ./compiler/rustc_interface/src/passes.rs:1026:19 47: codegen_and_build_linker at ./compiler/rustc_interface/src/queries.rs:128:31 48: {closure#6} at ./compiler/rustc_driver_impl/src/lib.rs:451:25 49: {closure#1}<rustc_driver_impl::run_compiler::{closure#0}::{closure#1}::{closure_env#6}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>> at ./compiler/rustc_middle/src/ty/context.rs:1336:37 50: {closure#0}<rustc_middle::ty::context::{impl#19}::enter::{closure_env#1}<rustc_driver_impl::run_compiler::{closure#0}::{closure#1}::{closure_env#6}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>> at ./compiler/rustc_middle/src/ty/context/tls.rs:82:9 51: try_with<core::cell::Cell<*const ()>, rustc_middle::ty::context::tls::enter_context::{closure_env#0}<rustc_middle::ty::context::{impl#19}::enter::{closure_env#1}<rustc_driver_impl::run_compiler::{closure#0}::{closure#1}::{closure_env#6}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>> at ./library/std/src/thread/local.rs:283:12 52: with<core::cell::Cell<*const ()>, rustc_middle::ty::context::tls::enter_context::{closure_env#0}<rustc_middle::ty::context::{impl#19}::enter::{closure_env#1}<rustc_driver_impl::run_compiler::{closure#0}::{closure#1}::{closure_env#6}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>> at ./library/std/src/thread/local.rs:260:9 53: enter_context<rustc_middle::ty::context::{impl#19}::enter::{closure_env#1}<rustc_driver_impl::run_compiler::{closure#0}::{closure#1}::{closure_env#6}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>> at ./compiler/rustc_middle/src/ty/context/tls.rs:79:5 54: enter<rustc_driver_impl::run_compiler::{closure#0}::{closure#1}::{closure_env#6}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>> at ./compiler/rustc_middle/src/ty/context.rs:1336:9 55: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}::{closure#1}::{closure#6}> at ./compiler/rustc_interface/src/queries.rs:64:9 56: {closure#1} at ./compiler/rustc_driver_impl/src/lib.rs:450:13 57: enter<rustc_driver_impl::run_compiler::{closure#0}::{closure_env#1}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>> at ./compiler/rustc_interface/src/queries.rs:209:19 58: {closure#0} at ./compiler/rustc_driver_impl/src/lib.rs:388:22 59: {closure#1}<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure_env#0}> at ./compiler/rustc_interface/src/interface.rs:502:27 60: {closure#0}<rustc_interface::interface::run_compiler::{closure_env#1}<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure_env#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>> at ./compiler/rustc_interface/src/util.rs:154:13 61: {closure#0}<rustc_interface::util::run_in_thread_pool_with_globals::{closure_env#0}<rustc_interface::interface::run_compiler::{closure_env#1}<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure_env#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>, core::result::Result<(), rustc_span::ErrorGuaranteed>> at ./compiler/rustc_interface/src/util.rs:106:21 62: set<rustc_span::SessionGlobals, rustc_interface::util::run_in_thread_with_globals::{closure#0}::{closure#0}::{closure_env#0}<rustc_interface::util::run_in_thread_pool_with_globals::{closure_env#0}<rustc_interface::interface::run_compiler::{closure_env#1}<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure_env#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>, core::result::Result<(), rustc_span::ErrorGuaranteed>>, core::result::Result<(), rustc_span::ErrorGuaranteed>> at /home/michael/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9 63: create_session_globals_then<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_with_globals::{closure#0}::{closure#0}::{closure_env#0}<rustc_interface::util::run_in_thread_pool_with_globals::{closure_env#0}<rustc_interface::interface::run_compiler::{closure_env#1}<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure_env#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>, core::result::Result<(), rustc_span::ErrorGuaranteed>>> at ./compiler/rustc_span/src/lib.rs:134:5 64: {closure#0}<rustc_interface::util::run_in_thread_pool_with_globals::{closure_env#0}<rustc_interface::interface::run_compiler::{closure_env#1}<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure_env#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>, core::result::Result<(), rustc_span::ErrorGuaranteed>> at ./compiler/rustc_interface/src/util.rs:105:17 note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace. error: the compiler unexpectedly panicked. this is a bug. note: using internal features is not supported and expected to cause internal compiler errors when used incorrectly note: rustc 1.82.0-dev running on x86_64-unknown-linux-gnu query stack during panic: #0 [optimized_mir] optimizing MIR for `<impl at /home/michael/test.rs:9:1: 9:32>::add` #1 [collect_and_partition_mono_items] collect_and_partition_mono_items end of query stack ```
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