1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Map-iterator-remove-3.js b/js/src/jit-test/tests/collections/Map-iterator-remove-3.js
new file mode 100644
index 0000000000..0b17dcfec8
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Map-iterator-remove-3.js
@@ -0,0 +1,13 @@
+// A map iterator can cope with removing the next entry, then the current entry.
+
+load(libdir + "asserts.js");
+load(libdir + "iteration.js");
+
+var map = new Map([['a', 0], ['b', 1], ['c', 2], ['d', 3]]);
+var iter = map[Symbol.iterator]();
+assertIteratorNext(iter, ['a', 0]);
+assertIteratorNext(iter, ['b', 1]);
+map.delete('c');
+map.delete('b');
+assertIteratorNext(iter, ['d', 3]);
+assertIteratorDone(iter, undefined);