diff --git a/7.3.051 b/7.3.051
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+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.051
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.051
+Problem:    Crash when $PATH is empty.
+Solution:   Check for vim_getenv() returning NULL. (Yasuhiro Matsumoto)
+Files:	    src/ex_getln.c, src/os_win32.c
+
+
+*** ../vim-7.3.050/src/ex_getln.c	2010-10-27 12:58:19.000000000 +0200
+--- src/ex_getln.c	2010-11-10 15:31:33.000000000 +0100
+***************
+*** 4747,4753 ****
+--- 4747,4757 ----
+  			    || (pat[1] == '.' && vim_ispathsep(pat[2])))))
+  	path = (char_u *)".";
+      else
++     {
+  	path = vim_getenv((char_u *)"PATH", &mustfree);
++ 	if (path == NULL)
++ 	    path = (char_u *)"";
++     }
+  
+      /*
+       * Go over all directories in $PATH.  Expand matches in that directory and
+*** ../vim-7.3.050/src/os_win32.c	2010-10-27 12:17:54.000000000 +0200
+--- src/os_win32.c	2010-11-10 15:30:36.000000000 +0100
+***************
+*** 211,223 ****
+      static void
+  get_exe_name(void)
+  {
+!     char	temp[MAXPATHL];
+      char_u	*p;
+  
+      if (exe_name == NULL)
+      {
+  	/* store the name of the executable, may be used for $VIM */
+! 	GetModuleFileName(NULL, temp, MAXPATHL - 1);
+  	if (*temp != NUL)
+  	    exe_name = FullName_save((char_u *)temp, FALSE);
+      }
+--- 211,226 ----
+      static void
+  get_exe_name(void)
+  {
+!     /* Maximum length of $PATH is more than MAXPATHL.  8191 is often mentioned
+!      * as the maximum length that works (plus a NUL byte). */
+! #define MAX_ENV_PATH_LEN 8192
+!     char	temp[MAX_ENV_PATH_LEN];
+      char_u	*p;
+  
+      if (exe_name == NULL)
+      {
+  	/* store the name of the executable, may be used for $VIM */
+! 	GetModuleFileName(NULL, temp, MAX_ENV_PATH_LEN - 1);
+  	if (*temp != NUL)
+  	    exe_name = FullName_save((char_u *)temp, FALSE);
+      }
+***************
+*** 232,241 ****
+  	     * "!xxd" it's found in our starting directory.  Needed because
+  	     * SearchPath() also looks there. */
+  	    p = mch_getenv("PATH");
+! 	    if (STRLEN(p) + STRLEN(exe_path) + 2 < MAXPATHL)
+  	    {
+! 		STRCPY(temp, p);
+! 		STRCAT(temp, ";");
+  		STRCAT(temp, exe_path);
+  		vim_setenv((char_u *)"PATH", temp);
+  	    }
+--- 235,250 ----
+  	     * "!xxd" it's found in our starting directory.  Needed because
+  	     * SearchPath() also looks there. */
+  	    p = mch_getenv("PATH");
+! 	    if (p == NULL
+! 		       || STRLEN(p) + STRLEN(exe_path) + 2 < MAX_ENV_PATH_LEN)
+  	    {
+! 		if (p == NULL || *p == NUL)
+! 		    temp[0] = NUL;
+! 		else
+! 		{
+! 		    STRCPY(temp, p);
+! 		    STRCAT(temp, ";");
+! 		}
+  		STRCAT(temp, exe_path);
+  		vim_setenv((char_u *)"PATH", temp);
+  	    }
+*** ../vim-7.3.050/src/version.c	2010-11-03 22:32:18.000000000 +0100
+--- src/version.c	2010-11-10 15:34:43.000000000 +0100
+***************
+*** 716,717 ****
+--- 716,719 ----
+  {   /* Add new patch number below this line */
++ /**/
++     51,
+  /**/
+
+-- 
+SIGFUN -- signature too funny (core dumped)
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\        download, build and distribute -- http://www.A-A-P.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///