1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/parser/redeclaration-message.js b/js/src/jit-test/tests/parser/redeclaration-message.js
new file mode 100644
index 0000000000..29de3cf7ba
--- /dev/null
+++ b/js/src/jit-test/tests/parser/redeclaration-message.js
@@ -0,0 +1,10 @@
+var aVar = 56;
+try {
+    console.log(aLet);
+    let aLet = 56;
+    // We cannot add `caught` variable on the toplevel for this testcase.
+    // We use assertEq here to catch non-throwing case.
+    assertEq(true, false);
+} catch (e) {
+    assertEq(e.message, "can't access lexical declaration 'aLet' before initialization");
+}