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-rw-r--r--js/src/jit-test/tests/collections/Map-clear-6.js6
1 files changed, 6 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Map-clear-6.js b/js/src/jit-test/tests/collections/Map-clear-6.js
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index 000000000..4df7388f5
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+++ b/js/src/jit-test/tests/collections/Map-clear-6.js
@@ -0,0 +1,6 @@
+// Clearing a Map doesn't affect expando properties.
+
+var m = new Map();
+m.x = 3;
+m.clear();
+assertEq(m.x, 3);