From ef02f16609ff0a26ffc6e20263523424980898fe Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sat, 7 May 2022 10:49:10 +0100
Subject: [PATCH] patch 8.2.4899: with latin1 encoding CTRL-W might go before
 the cmdline

Problem:    With latin1 encoding CTRL-W might go before the start of the
            command line.
Solution:   Check already being at the start of the command line.
---
 src/ex_getln.c               | 11 +++++++----
 src/testdir/test_cmdline.vim |  3 +++
 src/version.c                |  2 ++
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/ex_getln.c b/src/ex_getln.c
index a97024b35..7020f5143 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -1082,10 +1082,13 @@ cmdline_erase_chars(
 	{
 	    while (p > ccline.cmdbuff && vim_isspace(p[-1]))
 		--p;
-	    i = vim_iswordc(p[-1]);
-	    while (p > ccline.cmdbuff && !vim_isspace(p[-1])
-		    && vim_iswordc(p[-1]) == i)
-		--p;
+	    if (p > ccline.cmdbuff)
+	    {
+		i = vim_iswordc(p[-1]);
+		while (p > ccline.cmdbuff && !vim_isspace(p[-1])
+			&& vim_iswordc(p[-1]) == i)
+		    --p;
+	    }
 	}
 	else
 	    --p;
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index 474638fb0..5a849f77f 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -773,6 +773,9 @@ func Test_cmdline_remove_char()
 
     call feedkeys(":abc def\<S-Left>\<C-U>\<C-B>\"\<CR>", 'tx')
     call assert_equal('"def', @:, e)
+
+    " This was going before the start in latin1.
+    call feedkeys(": \<C-W>\<CR>", 'tx')
   endfor
 
   let &encoding = encoding_save
diff --git a/src/version.c b/src/version.c
index 201d26f06..05888c722 100644
--- a/src/version.c
+++ b/src/version.c
@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4899,
 /**/
     4898,
 /**/
-- 
2.40.0