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Avoid cycles from projection bounds

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Only check the own predicates of associated types when confirming
projection candidates.
Also consider implied bounds when comparing trait and impl methods.
This commit is contained in:
Matthew Jasper 2020-07-25 13:41:53 +01:00
parent 596d6c4b3b
commit 0dfa6ff3be
11 changed files with 122 additions and 85 deletions
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2
compiler/rustc_typeck/src/check/compare_method.rs
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@ -328,7 +328,7 @@ fn compare_predicate_entailment<'tcx>(
// Finally, resolve all regions. This catches wily misuses of
// lifetime parameters.
let fcx = FnCtxt::new(&inh, param_env, impl_m_hir_id);
fcx.regionck_item(impl_m_hir_id, impl_m_span, &[]);
fcx.regionck_item(impl_m_hir_id, impl_m_span, trait_sig.inputs_and_output);
Ok(())
})