To: vim_dev@googlegroups.com
Subject: Patch 7.4.831
Fcc: outbox
From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 7.4.831
Problem:    When expanding `=expr` on the command line and encountering an
            error, the command is executed anyway.
Solution:   Bail out when an error is detected.
Files:      src/misc1.c


*** ../vim-7.4.830/src/misc1.c	2015-07-28 21:17:31.522069387 +0200
--- src/misc1.c	2015-08-25 13:32:09.704105987 +0200
***************
*** 10875,10880 ****
--- 10875,10881 ----
      char_u		*p;
      static int		recursive = FALSE;
      int			add_pat;
+     int			retval = OK;
  #if defined(FEAT_SEARCHPATH)
      int			did_expand_in_path = FALSE;
  #endif
***************
*** 10924,10930 ****
--- 10925,10935 ----
  
  #ifdef VIM_BACKTICK
  	if (vim_backtick(p))
+ 	{
  	    add_pat = expand_backtick(&ga, p, flags);
+ 	    if (add_pat == -1)
+ 		retval = FAIL;
+ 	}
  	else
  #endif
  	{
***************
*** 11013,11019 ****
  
      recursive = FALSE;
  
!     return (ga.ga_data != NULL) ? OK : FAIL;
  }
  
  # ifdef VIM_BACKTICK
--- 11018,11024 ----
  
      recursive = FALSE;
  
!     return (ga.ga_data != NULL) ? retval : FAIL;
  }
  
  # ifdef VIM_BACKTICK
***************
*** 11031,11037 ****
  /*
   * Expand an item in `backticks` by executing it as a command.
   * Currently only works when pat[] starts and ends with a `.
!  * Returns number of file names found.
   */
      static int
  expand_backtick(gap, pat, flags)
--- 11036,11042 ----
  /*
   * Expand an item in `backticks` by executing it as a command.
   * Currently only works when pat[] starts and ends with a `.
!  * Returns number of file names found, -1 if an error is encountered.
   */
      static int
  expand_backtick(gap, pat, flags)
***************
*** 11048,11054 ****
      /* Create the command: lop off the backticks. */
      cmd = vim_strnsave(pat + 1, (int)STRLEN(pat) - 2);
      if (cmd == NULL)
! 	return 0;
  
  #ifdef FEAT_EVAL
      if (*cmd == '=')	    /* `={expr}`: Expand expression */
--- 11053,11059 ----
      /* Create the command: lop off the backticks. */
      cmd = vim_strnsave(pat + 1, (int)STRLEN(pat) - 2);
      if (cmd == NULL)
! 	return -1;
  
  #ifdef FEAT_EVAL
      if (*cmd == '=')	    /* `={expr}`: Expand expression */
***************
*** 11059,11065 ****
  				(flags & EW_SILENT) ? SHELL_SILENT : 0, NULL);
      vim_free(cmd);
      if (buffer == NULL)
! 	return 0;
  
      cmd = buffer;
      while (*cmd != NUL)
--- 11064,11070 ----
  				(flags & EW_SILENT) ? SHELL_SILENT : 0, NULL);
      vim_free(cmd);
      if (buffer == NULL)
! 	return -1;
  
      cmd = buffer;
      while (*cmd != NUL)
*** ../vim-7.4.830/src/version.c	2015-08-25 12:56:22.622312124 +0200
--- src/version.c	2015-08-25 13:55:45.693438779 +0200
***************
*** 743,744 ****
--- 743,746 ----
  {   /* Add new patch number below this line */
+ /**/
+     831,
  /**/

-- 
Every person is responsible for the choices he makes.

 /// 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    ///