Add ui test of temporary value in anyhow macro

dtolnay · Dec 28, 2020 · 91b970e · 91b970e
1 parent f9419cd
commit 91b970e
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diff --git a/tests/ui/temporary-value.rs b/tests/ui/temporary-value.rs
@@ -0,0 +1,5 @@
+use anyhow::anyhow;
+
+fn main() {
+    let _ = anyhow!(&String::new());
+}
diff --git a/tests/ui/temporary-value.stderr b/tests/ui/temporary-value.stderr
@@ -0,0 +1,9 @@
+error[E0716]: temporary value dropped while borrowed
+ --> $DIR/temporary-value.rs:4:22
+  |
+4 |     let _ = anyhow!(&String::new());
+  |             ---------^^^^^^^^^^^^^-
+  |             |        |
+  |             |        creates a temporary which is freed while still in use
+  |             temporary value is freed at the end of this statement
+  |             argument requires that borrow lasts for `'static`