1 files changed, 17 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 0000000000..fabd904e7b
--- /dev/null
+++ b/js/src/jit-test/tests/parser/bug-1263355-48.js
@@ -0,0 +1,17 @@
+// |jit-test| skip-if: helperThreadCount() === 0
+
+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);
+`);