diff options
Diffstat (limited to 'src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs')
| -rw-r--r-- | src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs b/src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs index 4c4c003ca46..67b7d3691dc 100644 --- a/src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs +++ b/src/tools/clippy/clippy_lints/src/methods/unnecessary_to_owned.rs @@ -385,6 +385,9 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty< Node::Expr(parent_expr) => { if let Some((callee_def_id, call_substs, recv, call_args)) = get_callee_substs_and_args(cx, parent_expr) { + // FIXME: the `subst_identity()` below seems incorrect, since we eventually + // call `tcx.try_subst_and_normalize_erasing_regions` further down + // (i.e., we are explicitly not in the identity context). let fn_sig = cx.tcx.fn_sig(callee_def_id).subst_identity().skip_binder(); if let Some(arg_index) = recv.into_iter().chain(call_args).position(|arg| arg.hir_id == expr.hir_id) && let Some(param_ty) = fn_sig.inputs().get(arg_index) @@ -435,7 +438,7 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty< let output_ty = fn_sig.output(); if output_ty.contains(*param_ty) { if let Ok(new_ty) = cx.tcx.try_subst_and_normalize_erasing_regions( - new_subst, cx.param_env, output_ty) { + new_subst, cx.param_env, EarlyBinder(output_ty)) { expr = parent_expr; ty = new_ty; continue; |