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Rollup merge of #111252 - matthewjasper:min-spec-improvements, r=compiler-errors

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Min specialization improvements

- Don't allow specialization impls with no items, such implementations are probably not correct and only occur as mistakes in the compiler and standard library
- Fix a missing normalization call
- Adds spans for lifetime errors from overly general specializations

Closes #79457
Closes #109815
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Dylan DPC 2023-05-09 12:33:46 +05:30 • committed by GitHub
commit f748bb1402
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20 changed files with 346 additions and 48 deletions
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compiler/rustc_hir_analysis/messages.ftl
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@ -279,6 +279,9 @@ hir_analysis_specialization_trait = implementing `rustc_specialization_trait` tr
hir_analysis_closure_implicit_hrtb = implicit types in closure signatures are forbidden when `for<...>` is present
.label = `for<...>` is here
hir_analysis_empty_specialization = specialization impl does not specialize any associated items
.note = impl is a specialization of this impl
hir_analysis_const_specialize = cannot specialize on const impl with non-const impl
hir_analysis_static_specialize = cannot specialize on `'static` lifetime