1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/xdr/lazy-class-definition.js b/js/src/jit-test/tests/xdr/lazy-class-definition.js
new file mode 100644
index 0000000000..ac29c9acf0
--- /dev/null
+++ b/js/src/jit-test/tests/xdr/lazy-class-definition.js
@@ -0,0 +1,51 @@
+load(libdir + 'bytecode-cache.js');
+
+// Bury the class definition deep in a lazy function to hit edge cases of lazy
+// script handling.
+
+test = `
+    function f1() {
+        function f2() {
+            function f3() {
+                class C {
+                    constructor() {
+                        this.x = 42;
+                    }
+                }
+                return new C;
+            }
+            return f3();
+        }
+        return f2();
+    }
+    if (generation >= 2) {
+        assertEq(f1().x, 42);
+    }
+`;
+evalWithCache(test, {});
+
+// NOTE: Fields currently force full parsing, but this test may be more
+//       interesting in future.
+test = `
+    function f1() {
+        function f2() {
+            function f3() {
+                class C {
+                    y = 12;
+
+                    constructor() {
+                        this.x = 42;
+                    }
+                }
+                return new C;
+            }
+            return f3();
+        }
+        return f2();
+    }
+    if (generation >= 2) {
+        assertEq(f1().x, 42);
+        assertEq(f1().y, 12);
+    }
+`;
+evalWithCache(test, {});