Test #[allow(unused)] on `if` expression

diff --git a/src/test/ui/parser/if-attrs/builtin-if-attr.rs b/src/test/ui/parser/if-attrs/builtin-if-attr.rs
new file mode 100644 (file)
index 0000000..7e29066
--- /dev/null
+++ b/src/test/ui/parser/if-attrs/builtin-if-attr.rs
@@ -0,0 +1,12 @@
+// check-pass
+
+fn main() {
+    #[allow(unused_variables)]
+    if true {
+        let a = 1;
+    } else if false {
+        let b = 1;
+    } else {
+        let c = 1;
+    }
+}