Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/auto-regress/bug1448582-4.js b/js/src/jit-test/tests/auto-regress/bug1448582-4.js
new file mode 100644
index 0000000000..a806e4a2e8
--- /dev/null
+++ b/js/src/jit-test/tests/auto-regress/bug1448582-4.js
@@ -0,0 +1,22 @@
+// Overview:
+// - The outer function is an IIFE which gets marked as a singleton.
+// - The |fn| inner function is then also marked as a singleton.
+// - The |self| inner function uses |Function.prototype.caller| to reinvoke the outer function.
+//
+// When we reinvoke outer, we end up cloning a previously reused, i.e. non-cloned,
+// function.
+
+(function(index) {
+    var fn = function(a) {};
+
+    // Accessing |.length| sets the resolved-length flag, which should not be
+    // copied over to the function clone.
+    assertEq(fn.length, 1);
+
+    // Reinvoke the IIFE through |Function.prototype.caller|.
+    if (index === 0) {
+        (function self() {
+            self.caller(1);
+        })();
+    }
+})(0);