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93ab12eeab
rust/compiler
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Aaron Hill 93ab12eeab
Improve cause information for NLL higher-ranked errors 
This PR has several interconnected pieces:

1. In some of the NLL region error code, we now pass
   around an `ObligationCause`, instead of just a plain `Span`.
   This gets forwarded into `fulfill_cx.register_predicate_obligation`
   during error reporting.
2. The general InferCtxt error reporting code is extended to
   handle `ObligationCauseCode::BindingObligation`
3. A new enum variant `ConstraintCategory::Predicate` is added.
   We try to avoid using this as the 'best blame constraint' - instead,
   we use it to enhance the `ObligationCause` of the `BlameConstraint`
   that we do end up choosing.

As a result, several NLL error messages now contain the same
"the lifetime requirement is introduced here" message as non-NLL
errors.

Having an `ObligationCause` available will likely prove useful
for future improvements to NLL error messages.
2021-09-27 10:23:45 -05:00
..
rustc Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_apfloat Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_arena Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_ast Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_ast_lowering rustc_index: Add some map-like APIs to IndexVec 2021-09-22 03:11:29 +03:00
rustc_ast_passes Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_ast_pretty Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_attr Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_borrowck Improve cause information for NLL higher-ranked errors 2021-09-27 10:23:45 -05:00
rustc_builtin_macros derive: Do not configure or clone items unless necessary 2021-09-24 21:45:51 +03:00
rustc_codegen_cranelift Auto merge of #89092 - bjorn3:sync_cg_clif-2021-09-19, r=bjorn3 2021-09-26 23:31:01 +00:00
rustc_codegen_llvm Enable new pass manager on LLVM 13 2021-09-25 11:24:23 +02:00
rustc_codegen_ssa Auto merge of #89030 - nbdd0121:box2, r=jonas-schievink 2021-09-25 11:01:13 +00:00
rustc_const_eval Report heap allocation instead of non-const fn for exchange_malloc call 2021-09-25 01:08:41 +01:00
rustc_data_structures Rollup merge of #89216 - r00ster91:bigo, r=dtolnay 2021-09-25 18:22:20 -07:00
rustc_driver Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_error_codes Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_errors Rollup merge of #89046 - oli-obk:fix_oflo, r=estebank 2021-09-22 19:03:22 +02:00
rustc_expand Check for macros in built-in attributes that don't support them. 2021-09-25 09:03:15 -07:00
rustc_feature Stabilize feature(macro_attributes_in_derive_output) 2021-09-24 21:48:30 +03:00
rustc_fs_util Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_graphviz Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_hir Auto merge of #89103 - Mark-Simulacrum:migrate-2021, r=estebank 2021-09-21 19:25:49 +00:00
rustc_hir_pretty Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_incremental Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_index rustc_index: Add some map-like APIs to IndexVec 2021-09-22 03:11:29 +03:00
rustc_infer Improve cause information for NLL higher-ranked errors 2021-09-27 10:23:45 -05:00
rustc_interface Check for macros in built-in attributes that don't support them. 2021-09-25 09:03:15 -07:00
rustc_lexer Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_lint Auto merge of #88865 - guswynn:must_not_suspend, r=oli-obk 2021-09-22 06:43:33 +00:00
rustc_lint_defs Auto merge of #88865 - guswynn:must_not_suspend, r=oli-obk 2021-09-22 06:43:33 +00:00
rustc_llvm Use correct pipeline for LTO at O0 2021-09-25 11:24:23 +02:00
rustc_macros Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_metadata Auto merge of #89016 - lcnr:non_blanket_impls, r=nikomatsakis,michaelwoerister 2021-09-23 15:44:53 +00:00
rustc_middle Improve cause information for NLL higher-ranked errors 2021-09-27 10:23:45 -05:00
rustc_mir_build Use Rvalue::ShallowInitBox for box expression 2021-09-25 01:08:41 +01:00
rustc_mir_dataflow Introduce Rvalue::ShallowInitBox 2021-09-25 01:08:41 +01:00
rustc_mir_transform Auto merge of #89030 - nbdd0121:box2, r=jonas-schievink 2021-09-25 11:01:13 +00:00
rustc_monomorphize Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_parse Check for macros in built-in attributes that don't support them. 2021-09-25 09:03:15 -07:00
rustc_parse_format Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_passes Auto merge of #88865 - guswynn:must_not_suspend, r=oli-obk 2021-09-22 06:43:33 +00:00
rustc_plugin_impl Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_privacy Auto merge of #89103 - Mark-Simulacrum:migrate-2021, r=estebank 2021-09-21 19:25:49 +00:00
rustc_query_impl Auto merge of #89120 - In-line:remove_unneded_visible_parents_map, r=estebank 2021-09-24 05:29:49 +00:00
rustc_query_system Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_resolve Rollup merge of #89224 - TaKO8Ki:change-the-order-of-suggestions, r=joshtriplett 2021-09-25 18:22:21 -07:00
rustc_save_analysis Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_serialize Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_session Rollup merge of #89133 - FabianWolff:issue-79546, r=michaelwoerister 2021-09-22 19:03:24 +02:00
rustc_span Rollup merge of #89072 - bjorn3:less_symbol_as_str, r=michaelwoerister 2021-09-24 11:40:12 -07:00
rustc_symbol_mangling Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_target Rollup merge of #89170 - rusticstuff:aarch64_macos_disable_leak_sanitizer, r=petrochenkov 2021-09-22 19:03:27 +02:00
rustc_trait_selection better suggestions 2021-09-27 00:30:39 +09:00
rustc_traits Improve cause information for NLL higher-ranked errors 2021-09-27 10:23:45 -05:00
rustc_ty_utils Auto merge of #89144 - sexxi-goose:insig_stdlib, r=nikomatsakis 2021-09-26 19:36:00 +00:00
rustc_type_ir Migrate to 2021 2021-09-20 22:21:42 -04:00
rustc_typeck Auto merge of #89230 - workingjubilee:rollup-1swktdq, r=workingjubilee 2021-09-25 00:20:28 +00:00