Add m-esr52 at 52.6.0

1 files changed, 9 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/parser/bug-1263355-51.js b/js/src/jit-test/tests/parser/bug-1263355-51.js
new file mode 100644
index 000000000..b2bdb680d
--- /dev/null
+++ b/js/src/jit-test/tests/parser/bug-1263355-51.js
@@ -0,0 +1,9 @@
+// TDZ checks work in destructuring default expressions,
+// even after the variables are initialized the first time.
+
+load(libdir + "asserts.js");
+
+assertThrowsInstanceOf(() => {
+    // should throw the second time through: b is uninitialized
+    for (const {a=b, b} of [{a:1, b:2}, {b:3}]) {}
+}, ReferenceError);