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-rw-r--r--js/src/jit-test/tests/basic/bug821850.js9
1 files changed, 9 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/bug821850.js b/js/src/jit-test/tests/basic/bug821850.js
new file mode 100644
index 000000000..fb0819c7b
--- /dev/null
+++ b/js/src/jit-test/tests/basic/bug821850.js
@@ -0,0 +1,9 @@
+load(libdir + "asserts.js");
+
+m={}
+Object.defineProperty(m, 'p', {value: 3});
+assertThrowsInstanceOf(function() {"use strict"; delete m.p;}, TypeError);
+
+x = new Proxy(m, {})
+assertEq(x.p, 3);
+assertThrowsInstanceOf(function fun() {"use strict"; return delete x.p; }, TypeError);