1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/class/bug1720032-2.js b/js/src/jit-test/tests/class/bug1720032-2.js
new file mode 100644
index 0000000000..7ca7a8df06
--- /dev/null
+++ b/js/src/jit-test/tests/class/bug1720032-2.js
@@ -0,0 +1,27 @@
+function main() {
+  class Base {}
+
+  class Derived extends Base {
+    constructor() {
+      let v = 0xffff;
+
+      try {
+        // Ensure this statement doesn't get DCE'ed.
+        v &= 0xff;
+
+        // Accessing |this| throws when |super()| wasn't yet called.
+        this;
+      } catch {}
+
+      assertEq(v, 255);
+
+      super();
+    }
+  }
+
+  for (let i = 0; i < 15; i++) {
+    new Derived();
+  }
+}
+main();
+main();