Exit with a status of 1 if something was wrong

diff --git a/bin/lesson_check.py b/bin/lesson_check.py
index a9b6c9c89c592d23021688c05ce03b127c1ab25c..af897d6a654730f947babb11bc3cfd0b3193e4d9 100755 (executable)
--- a/bin/lesson_check.py
+++ b/bin/lesson_check.py
@@ -118,6 +118,8 @@ def main():
         checker.check()
 
     args.reporter.report()
+    if args.reporter.messages:
+        raise SystemExit(1)
 
 
 def parse_args():