1 files changed, 18 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/max-string-length.js b/js/src/jit-test/tests/basic/max-string-length.js
new file mode 100644
index 0000000000..95daaa640a
--- /dev/null
+++ b/js/src/jit-test/tests/basic/max-string-length.js
@@ -0,0 +1,18 @@
+load(libdir + "asserts.js");
+
+const MaxStringLength = 2**30 - 2;
+
+// First check MaxStringLength is accurate.
+assertThrowsInstanceOf(() =>  "a".repeat(MaxStringLength + 1),
+                       RangeError);
+
+// escape() must handle uint32_t overflow correctly.
+var s = "\u0390".repeat(MaxStringLength);
+assertEq(s.length, MaxStringLength);
+var ex = null;
+try {
+    escape(s);
+} catch (e) {
+    ex = e;
+}
+assertEq(ex === "out of memory" || (ex instanceof InternalError), true);