Patch 7.4.1567
Problem:    Crash in assert_fails().
Solution:   Check for NULL. (Dominique Pelle)  Add a test.
Files:      src/eval.c, src/testdir/test_assert.vim


*** ../vim-7.4.1566/src/eval.c  2016-03-15 13:09:49.756277273 +0100
--- src/eval.c  2016-03-15 13:30:59.927026241 +0100
***************
*** 9386,9392 ****
        char_u  buf[NUMBUFLEN];
        char    *error = (char *)get_tv_string_buf_chk(&argvars[1], buf);
  
!       if (strstr((char *)vimvars[VV_ERRMSG].vv_str, error) == NULL)
        {
            prepare_assert_error(&ga);
            fill_assert_error(&ga, &argvars[2], NULL, &argvars[1],
--- 9386,9393 ----
        char_u  buf[NUMBUFLEN];
        char    *error = (char *)get_tv_string_buf_chk(&argvars[1], buf);
  
!       if (error == NULL
!                 || strstr((char *)vimvars[VV_ERRMSG].vv_str, error) == NULL)
        {
            prepare_assert_error(&ga);
            fill_assert_error(&ga, &argvars[2], NULL, &argvars[1],
*** ../vim-7.4.1566/src/testdir/test_assert.vim 2016-03-15 12:55:53.789004284 
+0100
--- src/testdir/test_assert.vim 2016-03-15 13:30:38.855246037 +0100
***************
*** 62,67 ****
--- 62,73 ----
    endtry
  endfunc
  
+ func Test_assert_fail_fails()
+   call assert_fails('xxx', {})
+   call assert_true(v:errors[0] =~ "Expected {} but got 'E731:")
+   call remove(v:errors, 0)
+ endfunc
+ 
  
  func Test_user_is_happy()
    smile
*** ../vim-7.4.1566/src/version.c       2016-03-15 13:09:49.760277231 +0100
--- src/version.c       2016-03-15 13:18:44.602696880 +0100
***************
*** 745,746 ****
--- 745,748 ----
  {   /* Add new patch number below this line */
+ /**/
+     1567,
  /**/

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