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region_infer.rs: add some debug!

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This commit is contained in:
Niko Matsakis 2018-08-27 14:14:26 -04:00
parent fc81e36242
commit 8eb789f4c7
1 changed files with 7 additions and 2 deletions
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9
src/librustc_mir/borrow_check/nll/region_infer/mod.rs
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@ -698,7 +698,10 @@ impl<'tcx> RegionInferenceContext<'tcx> {
// `ClosureOutlivesRequirement`.
let r_scc = self.constraint_sccs.scc(*lower_bound);
for ur in self.scc_values.universal_regions_outlived_by(r_scc) {
debug!("try_promote_type_test: ur={:?}", ur);
let non_local_ub = self.universal_region_relations.non_local_upper_bound(ur);
debug!("try_promote_type_test: non_local_ub={:?}", non_local_ub);
assert!(self.universal_regions.is_universal_region(non_local_ub));
assert!(
@ -707,11 +710,13 @@ impl<'tcx> RegionInferenceContext<'tcx> {
.is_local_free_region(non_local_ub)
);
propagated_outlives_requirements.push(ClosureOutlivesRequirement {
let requirement = ClosureOutlivesRequirement {
subject,
outlived_free_region: non_local_ub,
blame_span: locations.span(mir),
});
};
debug!("try_promote_type_test: pushing {:#?}", requirement);
propagated_outlives_requirements.push(requirement);
}
true
}