diff -Nru lola-1.5/debian/changelog lola-1.6/debian/changelog
--- lola-1.5/debian/changelog	2021-09-17 00:05:14.000000000 +0000
+++ lola-1.6/debian/changelog	2021-11-05 17:50:52.000000000 +0000
@@ -1,3 +1,10 @@
+lola (1.6-1) unstable; urgency=medium
+
+  * New upstream version
+  * Don't create output file if there is an error
+
+ -- Keith Packard <keithp@keithp.com>  Fri, 05 Nov 2021 10:50:52 -0700
+
 lola (1.5-1) unstable; urgency=medium
 
   * New upstream version
diff -Nru lola-1.5/debian/control lola-1.6/debian/control
--- lola-1.5/debian/control	2021-09-17 00:05:14.000000000 +0000
+++ lola-1.6/debian/control	2021-11-05 17:50:52.000000000 +0000
@@ -5,7 +5,7 @@
 Homepage: https://keithp.com
 Build-Depends: debhelper-compat (= 13), python3
 Rules-Requires-Root: no
-Standards-Version: 4.5.1
+Standards-Version: 4.6.0.1
 
 Package: lola
 Architecture: all
diff -Nru lola-1.5/lola.py lola-1.6/lola.py
--- lola-1.5/lola.py	2021-09-16 23:55:17.000000000 +0000
+++ lola-1.6/lola.py	2021-11-05 17:47:21.000000000 +0000
@@ -1366,9 +1366,6 @@
     lex_file_name = args.input
     output = sys.stdout
     outputname = "<stdout>"
-    if args.output:
-        outputname = args.output
-        output = open(args.output, 'w')
     format = 'c'
     if not args.format or args.format == 'c':
         format='c'
@@ -1378,6 +1375,9 @@
         error("Invalid output format %r" % args.format)
     grammar = lola()
     parse_table = ll(grammar)
+    if args.output:
+        outputname = args.output
+        output = open(args.output, 'w')
     if format == 'c':
         dump_c(grammar, parse_table, file=output, filename=outputname)
     elif format == 'python':