From: Girish Palya <girishji@gmail.com>
Date: Sat, 21 Feb 2026 10:10:17 +0000 (+0000)
Subject: patch 9.2.0036: completion: thesaurus completion incorrect with "longest/fuzzy"
X-Git-Tag: v9.2.0036^0
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=26a3f486cc708b285b20e92c206f1615d20b23b6;p=thirdparty%2Fvim.git

patch 9.2.0036: completion: thesaurus completion incorrect with "longest/fuzzy"

Problem:  completion: thesaurus completion incorrect with
          "longest/fuzzy" (Mao-Yining)
Solution: Disable fuzzy matching and longest-match insertion
          specifically for thesaurus completion (Girish Palya).

fixes:  #19356
closes: #19475

Signed-off-by: Girish Palya <girishji@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
---

diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 22e2ce2e34..0798934c2d 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 9.2.  Last change: 2026 Feb 17
+*options.txt*	For Vim version 9.2.  Last change: 2026 Feb 21
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -2257,11 +2257,13 @@ A jump table for the options with a short description can be found at |Q_op|.
 	   fuzzy    Enable |fuzzy-matching| for completion candidates.  This
 		    allows for more flexible and intuitive matching, where
 		    characters can be skipped and matches can be found even
-		    if the exact sequence is not typed.
+		    if the exact sequence is not typed (disabled for thesaurus
+		    completion |compl-thesaurus|).
 
 	   longest
 		    When 'autocomplete' is not active, only the longest common
-		    prefix of the matches is inserted.  If the popup menu is
+		    prefix of the matches is inserted (disabled for thesaurus
+		    completion |compl-thesaurus|).  If the popup menu is
 		    displayed, you can use CTRL-L to add more characters.
 		    Whether case is ignored depends on the type of completion.
 		    For buffer text the 'ignorecase' option applies.
diff --git a/src/insexpand.c b/src/insexpand.c
index 38e92dacfd..bfae80f61b 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -829,7 +829,7 @@ ins_compl_add_infercase(
     static int
 cot_fuzzy(void)
 {
-    return (get_cot_flags() & COT_FUZZY) != 0;
+    return (get_cot_flags() & COT_FUZZY) != 0 && !ctrl_x_mode_thesaurus();
 }
 
 /*
@@ -1035,7 +1035,7 @@ ins_compl_add(
 
     // Find the longest common string if still doing that.
     if (compl_get_longest && (flags & CP_ORIGINAL_TEXT) == 0 && !cot_fuzzy()
-	    && !ins_compl_preinsert_longest())
+	    && !ins_compl_preinsert_longest() && !ctrl_x_mode_thesaurus())
 	ins_compl_longest_match(match);
 
     return OK;
diff --git a/src/testdir/test_edit.vim b/src/testdir/test_edit.vim
index 57680e40fd..6ac115d775 100644
--- a/src/testdir/test_edit.vim
+++ b/src/testdir/test_edit.vim
@@ -919,7 +919,7 @@ func Test_edit_CTRL_S()
   bw!
 endfunc
 
-func Test_edit_CTRL_T()
+func Edit_CTRL_T()
   " Check for CTRL-T and CTRL-X CTRL-T in insert mode
   " 1) increase indent
   new
@@ -992,6 +992,29 @@ func Test_edit_CTRL_T()
   bw!
 endfunc
 
+func Test_edit_CTRL_T()
+  call Edit_CTRL_T()
+  set completeopt+=fuzzy
+  call Edit_CTRL_T()
+  set completeopt&
+endfunc
+
+func Test_edit_CTRL_T_longest()
+  " CTRL-X CTRL-T (thesaurus complete) with 'longest' should not insert
+  " longest match
+  set completeopt+=longest
+  new
+  call writefile(['angry furious mad madder maddest'], 'Xthesaurus', 'D')
+  set thesaurus=Xthesaurus
+  call setline(1, 'mad')
+  call cursor(1, 1)
+  call feedkeys("A\<c-x>\<c-t>\<cr>\<esc>", 'tnix')
+  call assert_equal(['mad', ''], getline(1, '$'))
+  bw!
+  set thesaurus=
+  set completeopt&
+endfunc
+
 " Test thesaurus completion with different encodings
 func Test_thesaurus_complete_with_encoding()
   call writefile(['angry furious mad enraged'], 'Xthesaurus', 'D')
diff --git a/src/version.c b/src/version.c
index 9e140b13f0..d38a466613 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    36,
 /**/
     35,
 /**/