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Assert index sanity.

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This commit is contained in:
Camille GILLOT 2022-07-27 22:22:39 +02:00
parent a424090252
commit c95ff1d52b
1 changed files with 7 additions and 2 deletions
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9
compiler/rustc_resolve/src/late/lifetimes.rs
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@ -1486,6 +1486,10 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
let map = &self.map;
let generics = self.tcx.generics_of(def_id);
// `type_def_id` points to an item, so there is nothing to inherit generics from.
debug_assert_eq!(generics.parent_count, 0);
let set_to_region = |set: ObjectLifetimeDefault| match set {
ObjectLifetimeDefault::Empty => {
if in_body {
@ -1496,8 +1500,9 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
}
ObjectLifetimeDefault::Static => Some(Region::Static),
ObjectLifetimeDefault::Param(param_def_id) => {
let index = generics.param_def_id_to_index[&param_def_id];
generic_args.args.get(index as usize).and_then(|arg| match arg {
// This index can be used with `generic_args` since `parent_count == 0`.
let index = generics.param_def_id_to_index[&param_def_id] as usize;
generic_args.args.get(index).and_then(|arg| match arg {
GenericArg::Lifetime(lt) => map.defs.get(&lt.hir_id).copied(),
_ => None,
})