1 files changed, 46 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/prop-access-error-message.js b/js/src/jit-test/tests/basic/prop-access-error-message.js
new file mode 100644
index 0000000000..00eb415f7a
--- /dev/null
+++ b/js/src/jit-test/tests/basic/prop-access-error-message.js
@@ -0,0 +1,46 @@
+// The decompiled expression used in the error messsage should not be confused
+// by unrelated value on the stack.
+
+var a = {};
+var b = {};
+var p = "c";
+
+function doPropAccess() {
+  // Both "a.c" and "b.e" are undefined.
+  // "a.c" should be used.
+  a.c.d = b.e;
+}
+
+function testPropAccess() {
+  var caught = false;
+  try {
+    doPropAccess();
+  } catch (e) {
+    assertEq(e.message.includes("a.c is undefined"), true);
+    caught = true;
+  }
+  assertEq(caught, true);
+}
+
+function doElemAccess() {
+  // Both "a[x]" and "b.e" are undefined.
+  // "a[x]" should be used.
+  var x = "c";
+  a[x].d = b.e;
+}
+
+function testElemAccess() {
+  var caught = false;
+  try {
+    doElemAccess();
+  } catch (e) {
+    assertEq(e.message.includes("a[x] is undefined"), true);
+    caught = true;
+  }
+  assertEq(caught, true);
+}
+
+for (var i = 0; i < 10; i++) {
+  testPropAccess();
+  testElemAccess();
+}