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Rollup merge of #93175 - spastorino:negative-traits-coherence-new, r=nikomatsakis

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Implement stable overlap check considering negative traits

This PR implement the new disjointness rules for overlap check described in https://rust-lang.github.io/negative-impls-initiative/explainer/coherence-check.html#new-disjointness-rules

r? ``@nikomatsakis``
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Matthias Krüger 2022-01-25 05:51:12 +01:00 • committed by GitHub
commit 3d6f276ca7
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5 changed files with 231 additions and 63 deletions
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compiler/rustc_span/src/symbol.rs
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@ -1204,6 +1204,7 @@ symbols! {
rustc_trivial_field_reads,
rustc_unsafe_specialization_marker,
rustc_variance,
rustc_with_negative_coherence,
rustdoc,
rustdoc_internals,
rustfmt,