Get allow(unused_mut) to work on let bindings

fixes #40491
2017-09-15 10:36:14 +02:00 · 2017-09-15 10:36:14 +02:00 · 1b571a0cfc
commit 1b571a0cfc
parent d86a7f7a78
2 changed files with 12 additions and 12 deletions
--- a/src/test/compile-fail/lint-unused-mut-variables.rs
+++ b/src/test/compile-fail/lint-unused-mut-variables.rs
@ -110,3 +110,11 @@ fn foo(mut a: isize) {
    let mut a = 3;
    let mut b = vec![2];
 }
+
+// make sure the lint attribute can be turned off on let statements
+#[deny(unused_mut)]
+fn bar() {
+    #[allow(unused_mut)]
+    let mut a = 3;
+    let mut b = vec![2]; //~ ERROR: variable does not need to be mutable
+}