1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/modules/bug-1284486-2.js b/js/src/jit-test/tests/modules/bug-1284486-2.js
new file mode 100644
index 0000000000..710f6e02eb
--- /dev/null
+++ b/js/src/jit-test/tests/modules/bug-1284486-2.js
@@ -0,0 +1,34 @@
+// This tests that attempting to perform ModuleDeclarationInstantation a
+// second time after a failure still fails. (It no longer stores and rethrows
+// the same error; the spec changed in that regard and the implementation was
+// updated in bug 1420420).
+//
+// The attempts fails becuase module 'a' is not available.
+//
+// This test exercises the path where the previously instantiated module is
+// re-instantiated directly.
+
+let b = registerModule('b', parseModule("export var b = 3; export var c = 4;"));
+let c = registerModule('c', parseModule("export * from 'a'; export * from 'b';"));
+
+let e1;
+let threw = false;
+try {
+    moduleLink(c);
+} catch (exc) {
+    threw = true;
+    e1 = exc;
+}
+assertEq(threw, true);
+assertEq(typeof e1 === "undefined", false);
+
+threw = false;
+let e2;
+try {
+    moduleLink(c);
+} catch (exc) {
+    threw = true;
+    e2 = exc;
+}
+assertEq(threw, true);
+assertEq(e1.toString(), e2.toString());