1 files changed, 17 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/modules/bug-1420420.js b/js/src/jit-test/tests/modules/bug-1420420.js
new file mode 100644
index 0000000000..e8bbcb81c8
--- /dev/null
+++ b/js/src/jit-test/tests/modules/bug-1420420.js
@@ -0,0 +1,17 @@
+// Test re-instantiation module after failure.
+
+load(libdir + "asserts.js");
+
+registerModule("good", parseModule(`export let x`));
+
+registerModule("y1", parseModule(`export let y`));
+registerModule("y2", parseModule(`export let y`));
+registerModule("bad", parseModule(`export* from "y1"; export* from "y2";`));
+
+registerModule("a", parseModule(`import {x} from "good"; import {y} from "bad";`));
+
+let b = registerModule("b", parseModule(`import "a";`));
+let c = registerModule("c", parseModule(`import "a";`));
+
+assertThrowsInstanceOf(() => moduleLink(b), SyntaxError);
+assertThrowsInstanceOf(() => moduleLink(c), SyntaxError);