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Diffstat (limited to 'crates/hir-ty/src/lower.rs')
| -rw-r--r-- | crates/hir-ty/src/lower.rs | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/crates/hir-ty/src/lower.rs b/crates/hir-ty/src/lower.rs index ae115c8c0d..8b360337a8 100644 --- a/crates/hir-ty/src/lower.rs +++ b/crates/hir-ty/src/lower.rs @@ -479,7 +479,14 @@ impl<'a> TyLoweringContext<'a> { TyKind::Placeholder(to_placeholder_idx(self.db, param_id.into())) } ParamLoweringMode::Variable => { - let idx = generics.param_idx(param_id.into()).expect("matching generics"); + let idx = match generics.param_idx(param_id.into()) { + None => { + never!("no matching generics"); + return (TyKind::Error.intern(Interner), None); + } + Some(idx) => idx, + }; + TyKind::BoundVar(BoundVar::new(self.in_binders, idx)) } } |