rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Disallow access to free BoundVars outside TyLoweringContext

Browse Source
This commit is contained in:
Ryo Yoshida
2022-12-07 23:22:37 +09:00
parent f9bd487708
commit 46e1486a90
3 changed files with 7 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
crates/hir-ty/src/lower.rs
View File

@@ -1190,9 +1190,9 @@ pub fn associated_type_shorthand_candidates<R>(
db: &dyn HirDatabase,
def: GenericDefId,
res: TypeNs,
cb: impl FnMut(&Name, &TraitRef, TypeAliasId) -> Option<R>,
mut cb: impl FnMut(&Name, TypeAliasId) -> Option<R>,
) -> Option<R> {
named_associated_type_shorthand_candidates(db, def, res, None, cb)
named_associated_type_shorthand_candidates(db, def, res, None, |name, _, id| cb(name, id))
}
fn named_associated_type_shorthand_candidates<R>(
@@ -1202,6 +1202,9 @@ fn named_associated_type_shorthand_candidates<R>(
def: GenericDefId,
res: TypeNs,
assoc_name: Option<Name>,
// Do NOT let `cb` touch `TraitRef` outside of `TyLoweringContext`. Its substitution contains
// free `BoundVar`s that need to be shifted and only `TyLoweringContext` knows how to do that
// properly (see `TyLoweringContext::select_associated_type()`).
mut cb: impl FnMut(&Name, &TraitRef, TypeAliasId) -> Option<R>,
) -> Option<R> {
let mut search = |t| {