1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gdc.test/compilable/test20021.d b/gcc/testsuite/gdc.test/compilable/test20021.d
new file mode 100644
index 00000000000..26ed1acf6bb
--- /dev/null
+++ b/gcc/testsuite/gdc.test/compilable/test20021.d
@@ -0,0 +1,22 @@
+// https://issues.dlang.org/show_bug.cgi?id=20021
+struct S
+{
+    bool opCast(T : bool)() { return true; }
+    S prop() {return this;}
+    S prop(S newThis) {return this;}
+}
+
+struct T
+{
+    bool opCast(T : bool)() { return false; }
+}
+
+void test20021()
+{
+    static if (T.init)
+        static assert(false);
+
+    // ensure properties are resolved
+    static if (!(true && T.init || (S.init.prop = S.init).prop))
+        static assert(false);
+}