Patch 8.2.3883

[Bram Moolenaar]

Patch 8.2.3883
Problem:    Crash when switching to other regexp engine fails.
Solution:   Check for regprog being NULL.
Files:      src/ex_cmds.c


*** ../vim-8.2.3882/src/ex_cmds.c       2021-11-29 20:39:06.674101624 +0000
--- src/ex_cmds.c       2021-12-24 16:44:54.603682728 +0000
***************
*** 4975,4980 ****
--- 4975,4982 ----
            // a match on this line?
            match = vim_regexec_multi(&regmatch, curwin, curbuf, lnum,
                                                       (colnr_T)0, NULL, NULL);
+           if (regmatch.regprog == NULL)
+               break;  // re-compiling regprog failed
            if ((type == 'g' && match) || (type == 'v' && !match))
            {
                ml_setmarked(lnum);
*** ../vim-8.2.3882/src/version.c       2021-12-24 12:02:38.638058816 +0000
--- src/version.c       2021-12-24 15:39:17.275991980 +0000
***************
*** 751,752 ****
--- 751,754 ----
  {   /* Add new patch number below this line */
+ /**/
+     3883,
  /**/

-- 
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 :-| :-|   Deja' vu!

 /// Bram Moolenaar -- b...@moolenaar.net -- http://www.Moolenaar.net   \\\
///                                                                      \\\
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