diff -up mutt-1.10.1/sendlib.c.mutt-1.9.3-1_coverity_197 mutt-1.10.1/sendlib.c
--- mutt-1.10.1/sendlib.c.mutt-1.9.3-1_coverity_197	2018-11-26 13:57:05.191252870 +0100
+++ mutt-1.10.1/sendlib.c	2018-11-26 13:57:50.489896425 +0100
@@ -2806,6 +2806,8 @@ int mutt_write_fcc (const char *path, HE
   if ((msg = mx_open_new_message (&f, hdr, onm_flags)) == NULL)
   {
     mx_close_mailbox (&f, NULL);
+    safe_fclose (&tempfp);
+    unlink (tempfile);
     return (-1);
   }