src/client/js-duk.c

@@ -763,6 +763,7 @@ int js_handle_event(struct mwevent *ev)
 	unsigned len;
 	unsigned i;
 
+	duk_require_stack(ctx, 5);
 	if (!duk_get_global_string(ctx, "mw")) {
 		fprintf(stderr, "mwjs error: failed to lookup mw namespace\n");
 		return -1;
@@ -968,6 +969,15 @@ static void define_api(void)
 	duk_def_prop(ctx, -3, DUK_DEFPROP_HAVE_VALUE);
 }
 
+static void fatal_handler(void *unused, const char *msg) {
+	if (msg == NULL)
+		fprintf(stderr, "mwjs encountered a fatal error - aborting.\n");
+	else
+		fprintf(stderr, "mwjs error (fatal): %s\n", msg);
+	fflush(stderr);
+	abort();
+}
+
 int setup_js(void)
 {
 	int is_local = 1;
@@ -975,7 +985,7 @@ int setup_js(void)
 	if (getmylogin() == NULL)
 		is_local = 0;
 
-	ctx = duk_create_heap_default();
+	ctx = duk_create_heap(NULL, NULL, NULL, NULL, fatal_handler);
 	if (ctx == NULL)
 		return -1;