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Elaborate unmet obligations in E0599 for more context

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This commit is contained in:
Esteban Küber 2023-01-12 19:53:01 +00:00
parent 0b90256ada
commit f6e6d2a035
4 changed files with 53 additions and 12 deletions
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28
compiler/rustc_hir_typeck/src/method/probe.rs
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@ -1587,11 +1587,29 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
let o = self.resolve_vars_if_possible(o);
if !self.predicate_may_hold(&o) {
result = ProbeResult::NoMatch;
possibly_unsatisfied_predicates.push((
o.predicate,
None,
Some(o.cause),
));
let parent_o = o.clone();
let implied_obligations =
traits::elaborate_obligations(self.tcx, vec![o]);
for o in implied_obligations {
let parent = if o == parent_o {
None
} else {
if o.predicate.to_opt_poly_trait_pred().map(|p| p.def_id())
== self.tcx.lang_items().sized_trait()
{
// We don't care to talk about implicit `Sized` bounds.
continue;
}
Some(parent_o.predicate)
};
if !self.predicate_may_hold(&o) {
possibly_unsatisfied_predicates.push((
o.predicate,
parent,
Some(o.cause),
));
}
}
}
}
}