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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.589
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.589
+Problem:    Crash when $HOME is not set.
+Solution:   Check for a NULL pointer. (Chris Webb)
+Files:	    src/misc1.c
+
+
+*** ../vim-7.3.588/src/misc1.c	2012-06-29 15:04:34.000000000 +0200
+--- src/misc1.c	2012-07-06 16:44:39.000000000 +0200
+***************
+*** 4496,4503 ****
+  #else
+      homedir_env_orig = homedir_env = mch_getenv((char_u *)"HOME");
+  #endif
+  #if defined(FEAT_MODIFY_FNAME) || defined(WIN3264)
+!     if (vim_strchr(homedir_env, '~') != NULL)
+      {
+  	int	usedlen = 0;
+  	int	flen;
+--- 4496,4507 ----
+  #else
+      homedir_env_orig = homedir_env = mch_getenv((char_u *)"HOME");
+  #endif
++     /* Empty is the same as not set. */
++     if (homedir_env != NULL && *homedir_env == NUL)
++ 	homedir_env = NULL;
++ 
+  #if defined(FEAT_MODIFY_FNAME) || defined(WIN3264)
+!     if (homedir_env != NULL && vim_strchr(homedir_env, '~') != NULL)
+      {
+  	int	usedlen = 0;
+  	int	flen;
+***************
+*** 4513,4520 ****
+      }
+  #endif
+  
+-     if (homedir_env != NULL && *homedir_env == NUL)
+- 	homedir_env = NULL;
+      if (homedir_env != NULL)
+  	envlen = STRLEN(homedir_env);
+  
+--- 4517,4522 ----
+*** ../vim-7.3.588/src/version.c	2012-07-06 16:39:43.000000000 +0200
+--- src/version.c	2012-07-06 16:45:18.000000000 +0200
+***************
+*** 716,717 ****
+--- 716,719 ----
+  {   /* Add new patch number below this line */
++ /**/
++     589,
+  /**/
+
+-- 
+I AM THANKFUL...
+...for the taxes that I pay because it means that I am employed.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\  an exciting new programming language -- http://www.Zimbu.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///