Conserve cause of ImplDerivedObligation in E0599
#106702
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…iaskrgr Rollup of 10 pull requests Successful merges: - rust-lang#106167 (Fix invalid syntax and incomplete suggestion in impl Trait parameter type suggestions for E0311) - rust-lang#106309 (Prefer non-`[type error]` candidates during selection) - rust-lang#106532 (Allow codegen to unsize `dyn*` to `dyn`) - rust-lang#106596 (Hide more of long types in E0271) - rust-lang#106638 (std tests: use __OsLocalKeyInner from realstd) - rust-lang#106676 (Test that we cannot use trait impl methods arguments as defining uses) - rust-lang#106702 (Conserve cause of `ImplDerivedObligation` in E0599) - rust-lang#106732 (rustc_llvm: replace llvm::makeArrayRef with ArrayRef constructors.) - rust-lang#106733 (Revert "warn newer available version of the x tool") - rust-lang#106748 (Clean up `OnUnimplementedFormatString::verify`) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
| |_idx, span| { | ||
| let misc = traits::ObligationCause::misc(span, self.body_id); | ||
| let parent_trait_pred = ty::Binder::dummy(ty::TraitPredicate { | ||
| trait_ref: ty::TraitRef::from_method(self.tcx, impl_def_id, substs), |
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I should've caught this when reviewing this, but this is not correct. We cannot construct a trait ref out of an impl def id and impl substs, and it's not meaningful to even use tcx.impl_trait_ref(impl_def_id).subst(self.tcx, substs) here because this is an inherent impl by construction.
I fixed this in #110133
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…trochenkov Do not use ImplDerivedObligationCause for inherent impl method error reporting We were constructing a `TraitRef` out of impl substs, for an *inherent* impl that has no corresponding trait. Instead of doing that, let's construct a meaningful obligation cause code, and instead adjust the error reporting machinery to handle that correctly. Fixes rust-lang#110131 cc rust-lang#106702, which introduced this regression
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…trochenkov Do not use ImplDerivedObligationCause for inherent impl method error reporting We were constructing a `TraitRef` out of impl substs, for an *inherent* impl that has no corresponding trait. Instead of doing that, let's construct a meaningful obligation cause code, and instead adjust the error reporting machinery to handle that correctly. Fixes rust-lang#110131 cc rust-lang#106702, which introduced this regression
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CC #86377.