1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/environments/delete-global-var.js b/js/src/jit-test/tests/environments/delete-global-var.js
new file mode 100644
index 0000000000..03b128affe
--- /dev/null
+++ b/js/src/jit-test/tests/environments/delete-global-var.js
@@ -0,0 +1,13 @@
+let assert = assertEq;
+
+this.x = "OK";
+this.y = "FAIL";
+
+for (let i = 0; i < 50; i++) {
+  assert(x, "OK");
+  if (i === 40) {
+    this.x = "FAIL";
+    delete this.x;
+    this.x = "OK";
+  }
+}