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authorMatthias Krüger <matthias.krueger@famsik.de>2023-06-19 19:26:28 +0200
committerGitHub <noreply@github.com>2023-06-19 19:26:28 +0200
commit263635b9172c183a7ab0f3a8a7326c3e16398ce9 (patch)
tree78f50da0b27d65839035f381724c75c2658d92d2 /compiler/rustc_codegen_gcc
parent68f2f1e32c7e831fa8819c780b6c9c0b54b8a935 (diff)
parentd43683f2e905d34ab289882c16124deb5ed09edd (diff)
downloadrust-263635b9172c183a7ab0f3a8a7326c3e16398ce9.tar.gz
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Rollup merge of #112780 - compiler-errors:tait-is-ambig, r=lcnr
Treat TAIT equation as always ambiguous in coherence

Not sure why we weren't treating all TAIT equality as ambiguous -- this behavior combined with `DefineOpaqueTypes::No` leads to coherence overlap failures, since we incorrectly consider impls as not overlapping because the obligation `T: From<Foo>` doesn't hold.

Fixes #112765
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