updated for version 7.4.022

Problem:    Deadlock while exiting, because of allocating memory.
Solution:   Do not use gettext() in deathtrap(). (James McCoy)

Author: brammool

src/misc1.c

@@ -9174,6 +9174,8 @@ prepare_to_exit()
 /*
  * Preserve files and exit.
  * When called IObuff must contain a message.
+ * NOTE: This may be called from deathtrap() in a signal handler, avoid unsafe
+ * functions, such as allocating memory.
  */
     void
 preserve_exit()
@@ -9196,7 +9198,7 @@ preserve_exit()
     {
 	if (buf->b_ml.ml_mfp != NULL && buf->b_ml.ml_mfp->mf_fname != NULL)
 	{
-	    OUT_STR(_("Vim: preserving files...\n"));
+	    OUT_STR("Vim: preserving files...\n");
 	    screen_start();	    /* don't know where cursor is now */
 	    out_flush();
 	    ml_sync_all(FALSE, FALSE);	/* preserve all swap files */
@@ -9206,7 +9208,7 @@ preserve_exit()
 
     ml_close_all(FALSE);	    /* close all memfiles, without deleting */
 
-    OUT_STR(_("Vim: Finished.\n"));
+    OUT_STR("Vim: Finished.\n");
 
     getout(1);
 }

src/os_unix.c

@@ -957,8 +957,10 @@ mch_didjmp()
 
 /*
  * This function handles deadly signals.
- * It tries to preserve any swap file and exit properly.
+ * It tries to preserve any swap files and exit properly.
  * (partly from Elvis).
+ * NOTE: Avoid unsafe functions, such as allocating memory, they can result in
+ * a deadlock.
  */
     static RETSIGTYPE
 deathtrap SIGDEFARG(sigarg)
@@ -1090,18 +1092,23 @@ deathtrap SIGDEFARG(sigarg)
     }
     if (entered == 2)
     {
-	OUT_STR(_("Vim: Double signal, exiting\n"));
+	/* No translation, it may call malloc(). */
+	OUT_STR("Vim: Double signal, exiting\n");
 	out_flush();
 	getout(1);
     }
 
+    /* No translation, it may call malloc(). */
 #ifdef SIGHASARG
-    sprintf((char *)IObuff, _("Vim: Caught deadly signal %s\n"),
+    sprintf((char *)IObuff, "Vim: Caught deadly signal %s\n",
 							 signal_info[i].name);
 #else
-    sprintf((char *)IObuff, _("Vim: Caught deadly signal\n"));
+    sprintf((char *)IObuff, "Vim: Caught deadly signal\n");
 #endif
-    preserve_exit();		    /* preserve files and exit */
+
+    /* Preserve files and exit.  This sets the really_exiting flag to prevent
+     * calling free(). */
+    preserve_exit();
 
 #ifdef NBDEBUG
     reset_signals();

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    22,
 /**/
     21,
 /**/