patch 9.0.2090: complete_info() skips entries with 'noselect'

Problem:  complete_info() skips entries with 'noselect'
Solution: Check, if first entry is at original text state

Unfortunately, Commit daef8c7
introduced a regression, that when ':set completeopt+=noselect' is set
and no completion item has been selected yet, it did not fill the
complete_info['items'] list.

This happened, because the current match item did not have the
CP_ORIGINAL_TEXT flag set and then the cp->prev pointer did point to the
original flag item, which caused the following while loop to not being
run but being skipped instead.

So when the 'noselect' is set, only start with to the previous selection
item, if the initial completion item has the CP_ORIGINAL_TEXT flag set,
else use the 2nd previous item instead.

fixes: #13451
closes: #13452

Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: chrisbra

src/insexpand.c

@@ -3080,7 +3080,7 @@ info_add_completion_info(list_T *li)
 
     // Skip the element with the CP_ORIGINAL_TEXT flag at the beginning, in case of
     // forward completion, or at the end, in case of backward completion.
-    match = forward ? match->cp_next : (compl_no_select ? match->cp_prev : match->cp_prev->cp_prev);
+    match = forward ? match->cp_next : (compl_no_select && match_at_original_text(match) ? match->cp_prev : match->cp_prev->cp_prev);
 
     while (match != NULL && !match_at_original_text(match))
     {

src/testdir/test_ins_complete.vim

@@ -2344,15 +2344,16 @@ func Test_complete_info_index()
   call feedkeys("Go\<C-X>\<C-P>\<F5>\<Esc>_dd", 'tx')
   call assert_equal(-1, g:compl_info['selected'])
 
-  " Check if index out of range
-  " https://github.com/vim/vim/pull/12971
   call feedkeys("Go\<C-X>\<C-N>\<C-P>\<F5>\<Esc>_dd", 'tx')
   call assert_equal(0, g:compl_info['selected'])
   call assert_equal(6 , len(g:compl_info['items']))
   call assert_equal("fff", g:compl_info['items'][g:compl_info['selected']]['word'])
   call feedkeys("Go\<C-X>\<C-N>\<C-N>\<C-N>\<C-N>\<C-N>\<C-N>\<C-N>\<C-N>\<C-N>\<F5>\<Esc>_dd", 'tx')
   call assert_equal("aaa", g:compl_info['items'][g:compl_info['selected']]['word'])
   call assert_equal(6 , len(g:compl_info['items']))
+  call feedkeys("Go\<C-X>\<C-N>\<F5>\<Esc>_dd", 'tx')
+  call assert_equal(-1, g:compl_info['selected'])
+  call assert_equal(6 , len(g:compl_info['items']))
 
   set completeopt&
   bwipe!

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2090,
 /**/
     2089,
 /**/