diff options
| -rw-r--r-- | compiler/rustc_typeck/src/collect.rs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/compiler/rustc_typeck/src/collect.rs b/compiler/rustc_typeck/src/collect.rs index 543e39af669..8f4f4fdcbe7 100644 --- a/compiler/rustc_typeck/src/collect.rs +++ b/compiler/rustc_typeck/src/collect.rs @@ -1369,7 +1369,11 @@ fn generics_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::Generics { generics.parent_count + generics.params.len() }); - let mut params: Vec<_> = opt_self.into_iter().collect(); + let mut params: Vec<_> = Vec::with_capacity(ast_generics.params.len() + has_self as usize); + + if let Some(opt_self) = opt_self { + params.push(opt_self); + } let early_lifetimes = early_bound_lifetimes_from_generics(tcx, ast_generics); params.extend(early_lifetimes.enumerate().map(|(i, param)| ty::GenericParamDef { |