add regression test for #74739 (mir const-prop bug) #75449

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Merged

bors merged 1 commit into rust-lang:master from RalfJung:const-prop-test

Aug 13, 2020

src/test/ui/issues/issue-74739.rs

-Original file line number
+Diff line change
@@ -0,0 +1,14 @@
+    // compile-flags: -O
+    // run-pass
+    struct Foo {
+        x: i32,
+    }
+    pub fn main() {
+        let mut foo = Foo { x: 42 };
+        let x = &mut foo.x;
+        *x = 13;
+        let y = foo;
+        assert_eq!(y.x, 13); // used to print 42 due to mir-opt bug
+    }