Patch 8.2.3257
Problem:    Calling prop_find() with -1 for ID gives errornous error. (Naohiro
            Ono)
Solution:   When passing -1 use -2. (closes #8674)
Files:      src/textprop.c, src/testdir/test_textprop.vim


*** ../vim-8.2.3256/src/textprop.c      2021-07-28 13:30:12.212929910 +0200
--- src/textprop.c      2021-07-31 18:32:31.413153828 +0200
***************
*** 686,692 ****
--- 686,696 ----
      skipstart = dict_get_bool(dict, (char_u *)"skipstart", 0);
  
      if (dict_find(dict, (char_u *)"id", -1) != NULL)
+     {
        id = dict_get_number(dict, (char_u *)"id");
+       if (id == -1)
+           id = -2;
+     }
      if (dict_find(dict, (char_u *)"type", -1))
      {
        char_u      *name = dict_get_string(dict, (char_u *)"type", FALSE);
*** ../vim-8.2.3256/src/testdir/test_textprop.vim       2021-07-28 
13:30:12.212929910 +0200
--- src/testdir/test_textprop.vim       2021-07-31 18:32:01.801327438 +0200
***************
*** 239,244 ****
--- 239,247 ----
    let result = prop_find({'type': 'prop_name', 'lnum': 1}, 'f')
    call assert_equal(expected[0], result)
  
+   " When ID is -1 it's like prop is not found.
+   call assert_equal({}, prop_find({'id': -1}))
+ 
    call prop_clear(1,6)
    call prop_type_delete('prop_name')
  
*** ../vim-8.2.3256/src/version.c       2021-07-31 17:20:00.620832958 +0200
--- src/version.c       2021-07-31 18:33:03.612970402 +0200
***************
*** 757,758 ****
--- 757,760 ----
  {   /* Add new patch number below this line */
+ /**/
+     3257,
  /**/

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