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Test that we lint the awaited expression

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This commit is contained in:
Eduardo Broto 2020-04-27 21:12:39 +02:00
parent 3a96f548d1
commit fc5fc6378c
2 changed files with 18 additions and 3 deletions
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13
tests/ui/used_underscore_binding.rs
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@ -87,11 +87,20 @@ fn non_variables() {
let f = _fn_test; let f = _fn_test;
f(); f();
} }
// Tests that we do not lint if the binding comes from await desugaring.
// See issue 5360. // Tests that we do not lint if the binding comes from await desugaring,
// but we do lint the awaited expression. See issue 5360.
async fn await_desugaring() { async fn await_desugaring() {
async fn foo() {} async fn foo() {}
fn uses_i(_i: i32) {}
foo().await; foo().await;
({
let _i = 5;
uses_i(_i);
foo()
})
.await
} }
fn main() { fn main() {

8
tests/ui/used_underscore_binding.stderr
View file

@ -30,5 +30,11 @@ error: used binding `_underscore_field` which is prefixed with an underscore. A
LL | s._underscore_field += 1; LL | s._underscore_field += 1;
| ^^^^^^^^^^^^^^^^^^^ | ^^^^^^^^^^^^^^^^^^^
error: aborting due to 5 previous errors error: used binding `_i` which is prefixed with an underscore. A leading underscore signals that a binding will not be used.
--> $DIR/used_underscore_binding.rs:100:16
|
LL | uses_i(_i);
| ^^
error: aborting due to 6 previous errors