Patch 9.0.0750
Problem:    Crash when popup closed in callback. (Maxim Kim)
Solution:   In syntax_end_parsing() check that syn_block is valid.
Files:      src/syntax.c, src/proto/syntax.pro, src/drawscreen.c


*** ../vim-9.0.0749/src/syntax.c        2022-09-17 21:07:52.099993159 +0100
--- src/syntax.c        2022-10-14 17:00:06.542509438 +0100
***************
*** 1542,1551 ****
   * lnum ->  line below window
   */
      void
! syntax_end_parsing(linenr_T lnum)
  {
      synstate_T        *sp;
  
      sp = syn_stack_find_entry(lnum);
      if (sp != NULL && sp->sst_lnum < lnum)
        sp = sp->sst_next;
--- 1542,1553 ----
   * lnum ->  line below window
   */
      void
! syntax_end_parsing(win_T *wp, linenr_T lnum)
  {
      synstate_T        *sp;
  
+     if (syn_block != wp->w_s)
+       return;  // not the right window
      sp = syn_stack_find_entry(lnum);
      if (sp != NULL && sp->sst_lnum < lnum)
        sp = sp->sst_next;
*** ../vim-9.0.0749/src/proto/syntax.pro        2022-06-27 23:15:24.000000000 
+0100
--- src/proto/syntax.pro        2022-10-14 17:02:42.931326388 +0100
***************
*** 2,8 ****
  void syntax_start(win_T *wp, linenr_T lnum);
  void syn_stack_free_all(synblock_T *block);
  void syn_stack_apply_changes(buf_T *buf);
! void syntax_end_parsing(linenr_T lnum);
  int syntax_check_changed(linenr_T lnum);
  int get_syntax_attr(colnr_T col, int *can_spell, int keep_state);
  void syntax_clear(synblock_T *block);
--- 2,8 ----
  void syntax_start(win_T *wp, linenr_T lnum);
  void syn_stack_free_all(synblock_T *block);
  void syn_stack_apply_changes(buf_T *buf);
! void syntax_end_parsing(win_T *wp, linenr_T lnum);
  int syntax_check_changed(linenr_T lnum);
  int get_syntax_attr(colnr_T col, int *can_spell, int keep_state);
  void syntax_clear(synblock_T *block);
*** ../vim-9.0.0749/src/drawscreen.c    2022-10-13 22:12:07.164673822 +0100
--- src/drawscreen.c    2022-10-14 17:02:50.471360276 +0100
***************
*** 2486,2492 ****
                // Let the syntax stuff know we skipped a few lines.
                if (syntax_last_parsed != 0 && syntax_last_parsed + 1 < lnum
                                                       && syntax_present(wp))
!                   syntax_end_parsing(syntax_last_parsed + 1);
  #endif
  
                // Display one line.
--- 2486,2492 ----
                // Let the syntax stuff know we skipped a few lines.
                if (syntax_last_parsed != 0 && syntax_last_parsed + 1 < lnum
                                                       && syntax_present(wp))
!                   syntax_end_parsing(wp, syntax_last_parsed + 1);
  #endif
  
                // Display one line.
***************
*** 2601,2607 ****
  #ifdef FEAT_SYN_HL
      // Let the syntax stuff know we stop parsing here.
      if (syntax_last_parsed != 0 && syntax_present(wp))
!       syntax_end_parsing(syntax_last_parsed + 1);
  #endif
  
      // If we didn't hit the end of the file, and we didn't finish the last
--- 2601,2607 ----
  #ifdef FEAT_SYN_HL
      // Let the syntax stuff know we stop parsing here.
      if (syntax_last_parsed != 0 && syntax_present(wp))
!       syntax_end_parsing(wp, syntax_last_parsed + 1);
  #endif
  
      // If we didn't hit the end of the file, and we didn't finish the last
*** ../vim-9.0.0749/src/version.c       2022-10-14 13:11:10.128828896 +0100
--- src/version.c       2022-10-14 17:01:11.350876166 +0100
***************
*** 697,698 ****
--- 697,700 ----
  {   /* Add new patch number below this line */
+ /**/
+     750,
  /**/

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