1 files changed, 1 insertions, 0 deletions
diff --git a/102persist.cc b/102persist.cc
index abefeda6..642385df 100644
--- a/102persist.cc
+++ b/102persist.cc
@@ -98,6 +98,7 @@ case SAVE: {
     filename = read_mu_text(ingredients.at(0).at(0));
   }
   ofstream fout(("lesson/"+filename).c_str());
+  if (!fout) break;
   string contents = read_mu_text(ingredients.at(1).at(0));
   fout << contents;
   fout.close();