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-rw-r--r--js/src/jit-test/tests/ion/bug1604631.js4
1 files changed, 4 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/bug1604631.js b/js/src/jit-test/tests/ion/bug1604631.js
new file mode 100644
index 0000000000..bc7e7e4ca9
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug1604631.js
@@ -0,0 +1,4 @@
+// |jit-test| error:can't access lexical declaration
+x = [];
+x.length;
+evaluate("x.length; let x = 1");