Bug testcase for GH-287 (finally internal error)

tests/ecmascript/test-bug-finally-ljtype-gh287.js

@@ -0,0 +1,35 @@
+/*
+ *  Bug in Duktape 1.2 and before where finalization just before
+ *  'finally' caused an internal error (GH-287).
+ */
+
+/*===
+The pig ate all the food, and then...
+*munch*
+Error: A pig ate everyone at 8:12
+done
+===*/
+
+function test() {
+    function Food() {
+        this.getEaten = function() { print("The pig ate all the food, and then..."); };
+    }
+    Duktape.fin(Food.prototype, function() {});
+    new Food().getEaten();
+
+    // The above line is critical to triggering the bug: on entry to TRYCATCH
+    // the first catch register must contain a value which (1) has only one
+    // reference left, and (2) has a finalizer.  When the error value is written
+    // to the catch register when setting up for the finally block, the value
+    // becomes unreachable and the finalizer is executed.
+
+    try { throw new Error("A pig ate everyone at 8:12"); }
+    finally { print("*munch*"); }
+}
+
+try {
+    test();
+} catch (e) {
+    print(e);
+}
+print('done');