1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/parser/bug-1263355-48.js b/js/src/jit-test/tests/parser/bug-1263355-48.js
new file mode 100644
index 000000000..2345b422e
--- /dev/null
+++ b/js/src/jit-test/tests/parser/bug-1263355-48.js
@@ -0,0 +1,18 @@
+if (helperThreadCount() == 0)
+  quit();
+
+function eval(source) {
+    offThreadCompileModule(source);
+    let m = finishOffThreadModule();
+    m.declarationInstantiation();
+    return m.evaluation();
+}
+function runTestCase(testcase) {
+    if (testcase() !== true) {}
+}
+eval(`
+  function testcase() {
+    function set () {}
+  }
+  runTestCase(testcase);
+`);