Use a type implementing Drop

rust-lang · Jun 3, 2019 · fea2cdb · fea2cdb
1 parent 7feeaf0
commit fea2cdb
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Showing 2 changed files with 18 additions and 2 deletions.
diff --git a/src/test/ui/nll/issue-61424.rs b/src/test/ui/nll/issue-61424.rs
@@ -2,6 +2,6 @@
 
 fn main() {
     let mut x; //~ ERROR: variable does not need to be mutable
-    x = 0;
-    dbg!(0);
+    x = String::new();
+    dbg!(x);
 }
diff --git a/src/test/ui/nll/issue-61424.stderr b/src/test/ui/nll/issue-61424.stderr
@@ -0,0 +1,16 @@
+error: variable does not need to be mutable
+  --> $DIR/issue-61424.rs:4:9
+   |
+LL |     let mut x;
+   |         ----^
+   |         |
+   |         help: remove this `mut`
+   |
+note: lint level defined here
+  --> $DIR/issue-61424.rs:1:9
+   |
+LL | #![deny(unused_mut)]
+   |         ^^^^^^^^^^
+
+error: aborting due to previous error
+