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rustup https://github.com/rust-lang/rust/pull/56837

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This commit is contained in:
Matthias Krüger 2019-01-05 08:21:56 +01:00
parent 33ec4e5220
commit a4b99c6d68
1 changed files with 9 additions and 4 deletions
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13
clippy_lints/src/len_zero.rs
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@ -302,10 +302,15 @@ fn has_is_empty(cx: &LateContext<'_, '_>, expr: &Expr) -> bool {
let ty = &walk_ptrs_ty(cx.tables.expr_ty(expr));
match ty.sty {
ty::Dynamic(ref tt, ..) => cx
.tcx
.associated_items(tt.principal().def_id())
.any(|item| is_is_empty(cx, &item)),
ty::Dynamic(ref tt, ..) => {
if let Some(principal) = tt.principal() {
cx.tcx
.associated_items(principal.def_id())
.any(|item| is_is_empty(cx, &item))
} else {
false
}
},
ty::Projection(ref proj) => has_is_empty_impl(cx, proj.item_def_id),
ty::Adt(id, _) => has_is_empty_impl(cx, id.did),
ty::Array(..) | ty::Slice(..) | ty::Str => true,