vim-patch:9.1.0806: tests: no error check when setting global 'briopt'

Problem:  tests: no error check when setting global 'briopt'
Solution: also parse and check global 'briopt' value (Milly)

closes: vim/vim#15911

https://github.com/vim/vim/commit/b38700ac81d90a652e5c8495056dd78df5babdde

Co-authored-by: Milly <milly.ca@gmail.com>

4 files changed, 24 insertions, 6 deletions

diff --git a/src/nvim/indent.c b/src/nvim/indent.c
index b7e3842aad..58215f738c 100644
--- a/src/nvim/indent.c
+++ b/src/nvim/indent.c
@@ -769,9 +769,15 @@ int get_number_indent(linenr_T lnum)
   return (int)col;
 }
 
+/// Check "briopt" as 'breakindentopt' and update the members of "wp".
 /// This is called when 'breakindentopt' is changed and when a window is
 /// initialized
-bool briopt_check(win_T *wp)
+///
+/// @param briopt  when NULL: use "wp->w_p_briopt"
+/// @param wp      when NULL: only check "briopt"
+///
+/// @return  FAIL for failure, OK otherwise.
+bool briopt_check(char *briopt, win_T *wp)
 {
   int bri_shift = 0;
   int bri_min = 20;
@@ -779,7 +785,13 @@ bool briopt_check(win_T *wp)
   int bri_list = 0;
   int bri_vcol = 0;
 
-  char *p = wp->w_p_briopt;
+  char *p = empty_string_option;
+  if (briopt != NULL) {
+    p = briopt;
+  } else if (wp != NULL) {
+    p = wp->w_p_briopt;
+  }
+
   while (*p != NUL) {
     // Note: Keep this in sync with p_briopt_values
     if (strncmp(p, "shift:", 6) == 0
@@ -807,6 +819,10 @@ bool briopt_check(win_T *wp)
     }
   }
 
+  if (wp == NULL) {
+    return OK;
+  }
+
   wp->w_briopt_shift = bri_shift;
   wp->w_briopt_min = bri_min;
   wp->w_briopt_sbr = bri_sbr;
diff --git a/src/nvim/option.c b/src/nvim/option.c
index 8e6e068e96..933ee4ba75 100644
--- a/src/nvim/option.c
+++ b/src/nvim/option.c
@@ -5112,7 +5112,7 @@ void didset_window_options(win_T *wp, bool valid_cursor)
     wp->w_skipcol = 0;
   }
   check_colorcolumn(NULL, wp);
-  briopt_check(wp);
+  briopt_check(NULL, wp);
   fill_culopt_flags(NULL, wp);
   set_chars_option(wp, wp->w_p_fcs, kFillchars, true, NULL, 0);
   set_chars_option(wp, wp->w_p_lcs, kListchars, true, NULL, 0);
diff --git a/src/nvim/optionstr.c b/src/nvim/optionstr.c
index 0e63a8089d..23b70ab5ad 100644
--- a/src/nvim/optionstr.c
+++ b/src/nvim/optionstr.c
@@ -717,11 +717,14 @@ const char *did_set_breakat(optset_T *args FUNC_ATTR_UNUSED)
 const char *did_set_breakindentopt(optset_T *args)
 {
   win_T *win = (win_T *)args->os_win;
-  if (briopt_check(win) == FAIL) {
+  char **varp = (char **)args->os_varp;
+
+  if (briopt_check(*varp, varp == &win->w_p_briopt ? win : NULL) == FAIL) {
     return e_invarg;
   }
+
   // list setting requires a redraw
-  if (win == curwin && win->w_briopt_list) {
+  if (varp == &win->w_p_briopt && win->w_briopt_list) {
     redraw_all_later(UPD_NOT_VALID);
   }
 
diff --git a/test/old/testdir/gen_opt_test.vim b/test/old/testdir/gen_opt_test.vim
index c28284afdf..89ddf283d2 100644
--- a/test/old/testdir/gen_opt_test.vim
+++ b/test/old/testdir/gen_opt_test.vim
@@ -45,7 +45,6 @@ endwhile
 let skip_setglobal_reasons = #{
       \ iminsert: 'The global value is always overwritten by the local value',
       \ imsearch: 'The global value is always overwritten by the local value',
-      \ breakindentopt:	'TODO: fix missing error handling for setglobal',
       \ conceallevel:	'TODO: fix missing error handling for setglobal',
       \ foldcolumn:	'TODO: fix missing error handling for setglobal',
       \ numberwidth:	'TODO: fix missing error handling for setglobal',