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Guillaume Gomez 12d1b173fb Rollup merge of #144977 - fmease:fortify-param-default-checks, r=compiler-errors 
Fortify generic param default checks

* Hard-reject instead of lint-reject type param defaults in generic assoc consts (GACs) (feature: `generic_const_items`).
  * In https://github.com/rust-lang/rust/pull/113522, I explicitly handled the free const item case and forgot about the assoc const one.
  * This led rustc to assume the default of emitting the deny-by-default lint `invalid_type_param_default`.
  * GCIs are unstable, thus we're not bound by backward compat
* Hard-reject instead of lint-reject type param defaults in foreign items.
  * We already hard-reject generic params on foreign items, so this isn't a breaking change.
  * There's no reason why we need to lint-reject.
* Refactor the way we determine where generic param defaults are allowed:
  * Don't default to emitting lint `invalid_type_param_defaults` for nodes that aren't explicitly handled but instead panic.
  * This would've caught my GAC oversight from above much earlier via fuzzing
  * Prevents us from accidentally stabilizing more invalid type param defaults in the future
* Streamline the phrasing of the diagnostic
2025-08-06 21:29:32 +02:00
..
auxiliary
Rehome tests/ui/issues/ tests [1/?]
2025-07-24 17:01:44 -04:00
autobind.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
bad-mid-path-type-params.rs
diagnostics: remove inconsistent English article "this" from E0107
2023-02-23 10:27:06 -07:00
bad-mid-path-type-params.stderr
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
default-type-params-well-formedness.rs
cleaned up some tests
2025-06-23 18:53:56 +05:00
empty-generic-brackets-equiv.rs
cleaned up some tests
2025-06-11 17:49:03 +05:00
empty-generic-brackets-equiv.stderr
cleaned up some tests
2025-06-11 17:49:03 +05:00
export-name-on-generics.fixed
Replace elided_named_lifetimes with mismatched_lifetime_syntaxes
2025-06-04 10:40:04 -04:00
export-name-on-generics.rs
Replace elided_named_lifetimes with mismatched_lifetime_syntaxes
2025-06-04 10:40:04 -04:00
export-name-on-generics.stderr
Remove hir::AssocItemKind.
2025-07-13 13:50:00 +00:00
foreign-generic-mismatch.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
foreign-generic-mismatch.stderr
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
generic-alias-unique.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-arg-mismatch-recover.rs
diagnostics: remove inconsistent English article "this" from E0107
2023-02-23 10:27:06 -07:00
generic-arg-mismatch-recover.stderr
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
generic-default-type-params-cross-crate.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
generic-default-type-params.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-derived-type.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-enum-errors.rs
cleaned up some tests
2025-07-13 00:03:31 +05:00
generic-enum-errors.stderr
cleaned up some tests
2025-07-13 00:03:31 +05:00
generic-exterior-unique.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-extern-lifetime.rs
…
generic-extern-lifetime.stderr
Make missing lifetime suggestion verbose
2025-06-24 18:59:42 +00:00
generic-extern-mangle.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-extern.rs
Fortify generic param default checks
2025-08-06 01:26:26 +02:00
generic-extern.stderr
Fortify generic param default checks
2025-08-06 01:26:26 +02:00
generic-fn-infer.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-fn-twice.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
generic-fn-unique.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-fn.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-function-item-where-type.rs
Automatically taint when reporting errors from ItemCtxt
2024-07-09 07:44:17 +00:00
generic-function-item-where-type.stderr
Automatically taint when reporting errors from ItemCtxt
2024-07-09 07:44:17 +00:00
generic-higher-ranked-lifetime-issue-122714.rs
Fix incorrect suggestion for undeclared hrtb lifetimes in where clauses.
2024-05-20 20:28:57 +08:00
generic-higher-ranked-lifetime-issue-122714.stderr
Fix incorrect suggestion for undeclared hrtb lifetimes in where clauses.
2024-05-20 20:28:57 +08:00
generic-impl-less-params-with-defaults.rs
diagnostics: remove inconsistent English article "this" from E0107
2023-02-23 10:27:06 -07:00
generic-impl-less-params-with-defaults.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
generic-impl-method-match-autoderef-18514.rs
Rehome tests/ui/issues/ tests [1/?]
2025-07-24 17:01:44 -04:00
generic-impl-more-params-with-defaults.rs
diagnostics: remove inconsistent English article "this" from E0107
2023-02-23 10:27:06 -07:00
generic-impl-more-params-with-defaults.stderr
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
generic-ivec-leak.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-lifetime-trait-impl.rs
…
generic-lifetime-trait-impl.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
generic-newtype-struct.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
generic-no-mangle.fixed
Replace elided_named_lifetimes with mismatched_lifetime_syntaxes
2025-06-04 10:40:04 -04:00
generic-no-mangle.rs
Replace elided_named_lifetimes with mismatched_lifetime_syntaxes
2025-06-04 10:40:04 -04:00
generic-no-mangle.stderr
Remove hir::AssocItemKind.
2025-07-13 13:50:00 +00:00
generic-non-trailing-defaults.rs
Disentangle ForwardGenericParamBan and ConstParamTy ribs
2025-03-12 16:56:26 +00:00
generic-non-trailing-defaults.stderr
Disentangle ForwardGenericParamBan and ConstParamTy ribs
2025-03-12 16:56:26 +00:00
generic-object.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-param-attrs.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-params-nested-fn-scope-error.rs
cleaned up some tests
2025-07-01 15:29:29 +05:00
generic-params-nested-fn-scope-error.stderr
cleaned up some tests
2025-07-01 15:29:29 +05:00
generic-recursive-tag.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-static-methods.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-tag-corruption.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
generic-tag-local.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
generic-tag-match.rs
Remove some unnecessary parens in assert! conditions
2025-02-06 22:28:44 +00:00
generic-tag-values.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-tag.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
generic-temporary.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-tup.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-type-less-params-with-defaults.rs
Test generic arg suggestion inside nested item
2024-03-17 23:40:12 +00:00
generic-type-less-params-with-defaults.stderr
Test generic arg suggestion inside nested item
2024-03-17 23:40:12 +00:00
generic-type-more-params-with-defaults.rs
diagnostics: remove inconsistent English article "this" from E0107
2023-02-23 10:27:06 -07:00
generic-type-more-params-with-defaults.stderr
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00
generic-type-params-forward-mention.rs
Disentangle ForwardGenericParamBan and ConstParamTy ribs
2025-03-12 16:56:26 +00:00
generic-type-params-forward-mention.stderr
Disentangle ForwardGenericParamBan and ConstParamTy ribs
2025-03-12 16:56:26 +00:00
generic-type-params-name-repr.rs
compiletest: Make diagnostic kind mandatory on line annotations
2025-04-30 10:44:24 +03:00
generic-type-params-name-repr.stderr
compiletest: Make diagnostic kind mandatory on line annotations
2025-04-30 10:44:24 +03:00
generic-type-synonym.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
generic-type.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generic-unique.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
generics-on-self-mod-segment.rs
Store resolution for self and crate root module segments
2024-11-20 18:57:02 +00:00
generics-on-self-mod-segment.stderr
Store resolution for self and crate root module segments
2024-11-20 18:57:02 +00:00
impl-block-params-declared-in-wrong-spot-issue-113073.rs
Update Tests
2024-06-05 20:08:00 -04:00
impl-block-params-declared-in-wrong-spot-issue-113073.stderr
Make missing lifetime suggestion verbose
2025-06-24 18:59:42 +00:00
invalid-type-param-default.rs
Fortify generic param default checks
2025-08-06 01:26:26 +02:00
invalid-type-param-default.stderr
Fortify generic param default checks
2025-08-06 01:26:26 +02:00
issue-333.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-1112.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-2936.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-32498.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-59508-1.rs
…
issue-59508-1.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
issue-59508.fixed
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-59508.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-59508.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
issue-61631-default-type-param-can-reference-self-in-trait.rs
…
issue-61631-default-type-param-can-reference-self-in-trait.stderr
On E0277 be clearer about implicit Sized bounds on type params and assoc types
2024-02-01 03:30:26 +00:00
issue-61631-default-type-param-cannot-reference-self.rs
…
issue-61631-default-type-param-cannot-reference-self.stderr
Disentangle ForwardGenericParamBan and ConstParamTy ribs
2025-03-12 16:56:26 +00:00
issue-65285-incorrect-explicit-lifetime-name-needed.rs
Introduce ReError
2023-02-09 10:26:49 +00:00
issue-65285-incorrect-explicit-lifetime-name-needed.stderr
Use structured suggestion when telling user about for<'a>
2023-06-30 00:34:14 +00:00
issue-79605.rs
add UI test for #79605
2023-04-15 17:17:46 +05:30
issue-79605.stderr
Bless and add tests
2025-01-23 06:01:36 +00:00
issue-80512-param-reordering-with-defaults.rs
…
issue-80512-param-reordering-with-defaults.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
issue-83556.rs
diagnostics: simpler 83556 handling by bailing out
2023-09-22 22:41:01 -07:00
issue-83556.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
issue-94432-garbage-ice.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-94923.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-95208-ignore-qself.fixed
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-95208-ignore-qself.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-95208-ignore-qself.stderr
Show diff suggestion format on verbose replacement
2025-02-10 20:21:39 +00:00
issue-95208.fixed
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-95208.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
issue-95208.stderr
Show diff suggestion format on verbose replacement
2025-02-10 20:21:39 +00:00
issue-98432.rs
Generalize E0401
2023-09-10 23:06:14 +02:00
issue-98432.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
issue-106694.rs
make error emitted on impl &Trait nicer
2023-01-15 12:23:46 +13:00
issue-106694.stderr
make error emitted on impl &Trait nicer
2023-01-15 12:23:46 +13:00
lifetime-before-type-params.rs
…
lifetime-before-type-params.stderr
…
mid-path-type-params.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
newtype-with-generics.rs
cleaned up some tests
2025-06-30 11:50:19 +05:00
overlapping-errors-span-issue-123861.rs
Fortify generic param default checks
2025-08-06 01:26:26 +02:00
overlapping-errors-span-issue-123861.stderr
Fortify generic param default checks
2025-08-06 01:26:26 +02:00
param-in-ct-in-ty-param-default.rs
…
param-in-ct-in-ty-param-default.stderr
generic_const_exprs: suggest to add the feature, not use it
2023-11-30 20:59:51 +01:00
post_monomorphization_error_backtrace.rs
Use the informative error as the main const eval error message
2025-06-02 15:37:15 +00:00
post_monomorphization_error_backtrace.stderr
Clarify why we are talking about a failed const eval at a random place
2025-06-02 15:37:15 +00:00
single-colon-path-not-const-generics.rs
Rip it out
2023-05-01 16:15:13 +08:00
single-colon-path-not-const-generics.stderr
Revert overzealous parse recovery for single colons
2025-04-24 02:57:10 +02:00
slightly-nice-generic-literal-messages.rs
compiletest: Make diagnostic kind mandatory on line annotations
2025-04-30 10:44:24 +03:00
slightly-nice-generic-literal-messages.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
trait-incorrect-generic-args.rs
cleaned up some tests
2025-07-05 01:54:04 +05:00
trait-incorrect-generic-args.stderr
cleaned up some tests
2025-07-05 01:54:04 +05:00
type-params-in-for-each.rs
tests: remove //@ pretty-expanded usages
2024-11-26 02:50:48 +08:00
unclosed-generics-in-impl-def.rs
Tweak unclosed generics errors
2023-12-01 20:01:39 +00:00
unclosed-generics-in-impl-def.stderr
Tweak unclosed generics errors
2023-12-01 20:01:39 +00:00
unconstrained-type-params-inherent-impl.rs
cleaned up some tests
2025-06-28 16:24:17 +05:00
unconstrained-type-params-inherent-impl.stderr
cleaned up some tests
2025-06-28 16:24:17 +05:00
unnecessary-path-disambiguator-36116.rs
Rehome tests/ui/issues/ tests [2/?]
2025-08-02 15:29:16 -04:00
unused-type-parameter-regression-36075.rs
Rehome tests/ui/issues/ tests [3/?]
2025-08-04 16:43:53 -04:00
wrong-number-of-args.rs
Change suggestion message wording
2024-07-22 22:04:49 +00:00
wrong-number-of-args.stderr
Revert suggestion verbosity change
2024-07-22 22:51:53 +00:00