1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/bug-1866636.js b/js/src/jit-test/tests/collections/bug-1866636.js
new file mode 100644
index 0000000000..b535ecd2f6
--- /dev/null
+++ b/js/src/jit-test/tests/collections/bug-1866636.js
@@ -0,0 +1,10 @@
+// |jit-test| --enable-symbols-as-weakmap-keys; skip-if: getBuildConfiguration("release_or_beta")
+b = new WeakMap();
+c = Symbol();
+b.set(c);
+c = gczeal(10);
+for (i=0; i<1000; ++i) {
+    try {
+        x;
+    } catch {}
+}