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Matthias Krüger 1f2a26e999
Rollup merge of #90023 - b-naber:postpone_const_eval_infer_vars, r=nikomatsakis 
Postpone the evaluation of constant expressions that depend on inference variables

Previously `delay_span_bug` calls were triggered once an inference variable was included in the substs of a constant that was to be evaluated. Some of these would merely have resulted in trait candidates being rejected, hence no real error was ever encountered, but the triggering of the `delay_span_bug` then caused an ICE in later stages of the compiler due to no error ever occurring.
We now postpone the evaluation of these constants, so any trait obligation fulfillment will simply stall on this constant and the existing type inference machinery of the compiler handles any type errors if present.

Fixes https://github.com/rust-lang/rust/issues/89320
Fixes https://github.com/rust-lang/rust/issues/89146
Fixes https://github.com/rust-lang/rust/issues/87964
Fixes https://github.com/rust-lang/rust/issues/87470
Fixes https://github.com/rust-lang/rust/issues/83288
Fixes https://github.com/rust-lang/rust/issues/83249
Fixes https://github.com/rust-lang/rust/issues/90654

I want to thank `@BoxyUwU` for cooperating on this and for providing some help.

r? `@lcnr` maybe?
2021-12-05 00:37:58 +01:00
..
rustc Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_apfloat Revert "Auto merge of #89709 - clemenswasser:apply_clippy_suggestions_2, r=petrochenkov" 2021-10-15 11:28:23 +02:00
rustc_arena Add some comments. 2021-11-19 07:52:59 +11:00
rustc_ast Add initial AST and MIR support for unwinding from inline assembly 2021-12-03 23:51:46 +01:00
rustc_ast_lowering add unwind_asm feature gate for may_unwind option 2021-12-03 23:51:49 +01:00
rustc_ast_passes Rollup merge of #91208 - estebank:eq-constraint, r=cjgillot 2021-11-27 11:46:44 +01:00
rustc_ast_pretty Add initial AST and MIR support for unwinding from inline assembly 2021-12-03 23:51:46 +01:00
rustc_attr re-format with new rustfmt 2021-11-30 13:08:41 -05:00
rustc_borrowck Auto merge of #88439 - cynecx:unwind_asm, r=Amanieu 2021-12-04 05:59:16 +00:00
rustc_builtin_macros Rollup merge of #90519 - estebank:issue-84003, r=petrochenkov 2021-12-04 10:42:20 +01:00
rustc_codegen_cranelift cg_cranelift: check may_unwind flag instead of cleanup 2021-12-03 23:51:49 +01:00
rustc_codegen_gcc rustc_codegen_gcc: proper check for may_unwind 2021-12-03 23:51:49 +01:00
rustc_codegen_llvm LLVM codgen support for unwinding inline assembly 2021-12-03 23:51:49 +01:00
rustc_codegen_ssa LLVM codgen support for unwinding inline assembly 2021-12-03 23:51:49 +01:00
rustc_const_eval Add initial AST and MIR support for unwinding from inline assembly 2021-12-03 23:51:46 +01:00
rustc_data_structures Rollup merge of #88906 - Kixunil:box-maybe-uninit-write, r=dtolnay 2021-12-03 06:24:11 +01:00
rustc_driver add rustc option for using LLVM stack smash protection 2021-11-22 20:06:22 +01:00
rustc_error_codes Clarify and tidy up explanation of E0038 2021-11-30 09:25:17 -08:00
rustc_errors Rollup merge of #91394 - Mark-Simulacrum:bump-stage0, r=pietroalbini 2021-12-02 15:52:03 +01:00
rustc_expand Rollup merge of #91385 - ecstatic-morse:pat-param-spec-suggest, r=estebank 2021-12-04 02:26:23 +01:00
rustc_feature add unwind_asm feature gate for may_unwind option 2021-12-03 23:51:49 +01:00
rustc_fs_util Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_graphviz Revert "Auto merge of #89709 - clemenswasser:apply_clippy_suggestions_2, r=petrochenkov" 2021-10-15 11:28:23 +02:00
rustc_hir Rollup merge of #90519 - estebank:issue-84003, r=petrochenkov 2021-12-04 10:42:20 +01:00
rustc_hir_pretty Add initial AST and MIR support for unwinding from inline assembly 2021-12-03 23:51:46 +01:00
rustc_incremental Add -Zassert-incr-state to assert state of incremental cache 2021-11-12 13:41:46 -06:00
rustc_index Auto merge of #90491 - Mark-Simulacrum:push-pred-faster, r=matthewjasper 2021-11-24 15:51:46 +00:00
rustc_infer Rollup merge of #90023 - b-naber:postpone_const_eval_infer_vars, r=nikomatsakis 2021-12-05 00:37:58 +01:00
rustc_interface expand: Turn ast::Crate into a first class expansion target 2021-11-28 15:48:55 +08:00
rustc_lexer Auto merge of #91393 - Julian-Wollersberger:lexer_optimization, r=petrochenkov 2021-12-03 13:20:14 +00:00
rustc_lint Use let_else in some more places in rustc_lint 2021-12-03 03:51:47 +01:00
rustc_lint_defs Properly register text_direction_codepoint_in_comment lint. 2021-11-05 20:12:40 +01:00
rustc_llvm LLVM codgen support for unwinding inline assembly 2021-12-03 23:51:49 +01:00
rustc_macros Rename TypeFolderFallible to FallibleTypeFolder 2021-12-02 16:14:18 +00:00
rustc_metadata Improve suggestion for extern crate self error message 2021-12-01 21:59:54 +00:00
rustc_middle Rollup merge of #90519 - estebank:issue-84003, r=petrochenkov 2021-12-04 10:42:20 +01:00
rustc_mir_build Add initial AST and MIR support for unwinding from inline assembly 2021-12-03 23:51:46 +01:00
rustc_mir_dataflow Add initial AST and MIR support for unwinding from inline assembly 2021-12-03 23:51:46 +01:00
rustc_mir_transform Add initial AST and MIR support for unwinding from inline assembly 2021-12-03 23:51:46 +01:00
rustc_monomorphize Rollup merge of #90701 - michaelwoerister:more-artifact-sizes, r=davidtwco 2021-11-09 19:00:45 +01:00
rustc_parse Rollup merge of #90022 - hkmatsumoto:self-upper-as-generic-parameter, r=jackh726 2021-12-05 00:37:56 +01:00
rustc_parse_format Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_passes Update invalid crate attributes, add help message 2021-12-03 18:38:32 +00:00
rustc_plugin_impl Move rustc_middle::middle::cstore to rustc_session. 2021-10-03 16:08:51 +02:00
rustc_privacy Take a LocalDefId in expect_*item. 2021-11-28 21:09:45 +01:00
rustc_query_impl Revert "Add rustc lint, warning when iterating over hashmaps" 2021-10-28 11:01:42 -04:00
rustc_query_system Manually outline error on incremental_verify_ich 2021-11-22 21:32:20 -05:00
rustc_resolve Annotate derived spans and move span suggestion code 2021-12-03 18:41:40 +00:00
rustc_save_analysis Give inline const separate DefKind 2021-11-07 03:59:06 +00:00
rustc_serialize Avoid generating empty closures for fieldless enums 2021-11-22 21:22:35 -05:00
rustc_session Accumulate all values of -C remark option 2021-11-29 09:12:01 +01:00
rustc_span Rollup merge of #90519 - estebank:issue-84003, r=petrochenkov 2021-12-04 10:42:20 +01:00
rustc_symbol_mangling Revert "Add rustc lint, warning when iterating over hashmaps" 2021-10-28 11:01:42 -04:00
rustc_target Auto merge of #91003 - psumbera:sparc64-abi, r=nagisa 2021-12-02 02:59:44 +00:00
rustc_trait_selection Rollup merge of #90519 - estebank:issue-84003, r=petrochenkov 2021-12-04 10:42:20 +01:00
rustc_traits Reduce boilerplate around infallible folders 2021-12-02 16:14:16 +00:00
rustc_ty_utils Revert "Auto merge of #91354 - fee1-dead:const_env, r=spastorino" 2021-12-03 10:11:21 -03:00
rustc_type_ir Add two inline annotations for hot functions 2021-10-03 12:43:43 -04:00
rustc_typeck Rollup merge of #90519 - estebank:issue-84003, r=petrochenkov 2021-12-04 10:42:20 +01:00