1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/modules/bug-1476921.js b/js/src/jit-test/tests/modules/bug-1476921.js
new file mode 100644
index 0000000000..005099319f
--- /dev/null
+++ b/js/src/jit-test/tests/modules/bug-1476921.js
@@ -0,0 +1,31 @@
+// |jit-test|
+"use strict";
+
+load(libdir + "asserts.js");
+
+class UniqueError extends Error {}
+
+let a = registerModule('a', parseModule(`
+    throw new UniqueError();
+`));
+
+let b = registerModule('b', parseModule(`
+    import * as ns0 from "a";
+`));
+
+moduleLink(a);
+moduleEvaluate(a)
+  .then(r => {
+    // We should not reach here, as we expect an error to be thrown.
+    assertEq(false, true);
+  })
+  .catch(e => assertEq(e instanceof UniqueError, true));
+moduleLink(b);
+moduleEvaluate(b)
+  .then(r => {
+    // We should not reach here, as we expect an error to be thrown.
+    assertEq(false, true);
+  })
+  .catch(e => assertEq(e instanceof UniqueError, true));
+
+drainJobQueue();