1 files changed, 17 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/fields/quirks.js b/js/src/jit-test/tests/fields/quirks.js
new file mode 100644
index 0000000000..4f8dfa9f75
--- /dev/null
+++ b/js/src/jit-test/tests/fields/quirks.js
@@ -0,0 +1,17 @@
+class C {
+    x;;;;
+    y
+    ;
+}
+
+class D {
+    x = 5;
+    y = (this.x += 1) + 2;
+}
+
+let val = new D();
+assertEq(6, val.x);
+assertEq(8, val.y);
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);