Adding upstream version 86.0.1.upstream/86.0.1upstream

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

1 files changed, 10 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/basic/testArrayConcat.js b/js/src/jit-test/tests/basic/testArrayConcat.js
new file mode 100644
index 0000000000..ec29e43536
--- /dev/null
+++ b/js/src/jit-test/tests/basic/testArrayConcat.js
@@ -0,0 +1,10 @@
+
+var x = Array(4);
+x[0] = 1;
+x[1] = 2;
+x[2] = 3;
+var y = x.concat();
+assertEq(y[3], undefined);
+
+var z = x.concat(/abc/).pop();
+assertEq(z.source, "abc");