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-rw-r--r--src/nvim/ex_cmds.c4
-rw-r--r--src/nvim/testdir/test_substitute.vim17
2 files changed, 21 insertions, 0 deletions
diff --git a/src/nvim/ex_cmds.c b/src/nvim/ex_cmds.c
index 97080ad81d..2cc64918a3 100644
--- a/src/nvim/ex_cmds.c
+++ b/src/nvim/ex_cmds.c
@@ -3887,6 +3887,10 @@ static int do_sub(exarg_T *eap, proftime_T timeout, long cmdpreview_ns, handle_T
- regmatch.startpos[0].lnum;
search_match_endcol = regmatch.endpos[0].col
+ len_change;
+ if (search_match_lines == 0 && search_match_endcol == 0) {
+ // highlight at least one character for /^/
+ search_match_endcol = 1;
+ }
highlight_match = true;
update_topline(curwin);
diff --git a/src/nvim/testdir/test_substitute.vim b/src/nvim/testdir/test_substitute.vim
index b3a80072d9..1667853575 100644
--- a/src/nvim/testdir/test_substitute.vim
+++ b/src/nvim/testdir/test_substitute.vim
@@ -1,6 +1,8 @@
" Tests for the substitute (:s) command
source shared.vim
+source check.vim
+source screendump.vim
func Test_multiline_subst()
enew!
@@ -668,6 +670,21 @@ func Test_sub_cmd_9()
bw!
endfunc
+func Test_sub_highlight_zero_match()
+ CheckRunVimInTerminal
+
+ let lines =<< trim END
+ call setline(1, ['one', 'two', 'three'])
+ END
+ call writefile(lines, 'XscriptSubHighlight', 'D')
+ let buf = RunVimInTerminal('-S XscriptSubHighlight', #{rows: 8, cols: 60})
+ call term_sendkeys(buf, ":%s/^/ /c\<CR>")
+ call VerifyScreenDump(buf, 'Test_sub_highlight_zer_match_1', {})
+
+ call term_sendkeys(buf, "\<Esc>")
+ call StopVimInTerminal(buf)
+endfunc
+
func Test_nocatch_sub_failure_handling()
" normal error results in all replacements
func Foo()