cmd_file(): only free words if succeeded

Otherwise, we may accidentally summon Cthulhu.

diff --git a/session.cxx b/session.cxx
index 3b968782cacd69fd5bc7a3e7e9f47019e1737e9c..f457829a6036b21859f91ed154989724eeb85a6d 100644 (file)
--- a/session.cxx
+++ b/session.cxx
@@ -1773,8 +1773,10 @@ systemtap_session::cmd_file ()
   int rc = wordexp (cmd.c_str (), &words, WRDE_NOCMD|WRDE_UNDEF);
   string file;
   if(rc == 0 && words.we_wordc > 0)
-    file = words.we_wordv[0];
-  wordfree (& words);
+    {
+      file = words.we_wordv[0];
+      wordfree (& words);
+    }
   return file;
 }