# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1655921703 -7200
# Node ID 8408ffd9af6924ff831d3657033e316bd6bd83d4
# Parent  e6542b0893758034337cbbe71caf8c8c214cb087
patch 8.2.5150: read past the end of the first line with ":0;'{"

Commit: https://github.com/vim/vim/commit/f7c7c3fad6d2135d558f3b36d0d1a943118aeb5e
Author: Bram Moolenaar <Bram@vim.org>
Date:   Wed Jun 22 19:08:38 2022 +0100

    patch 8.2.5150: read past the end of the first line with ":0;'{"

    Problem:    Read past the end of the first line with ":0;'{".
    Solution:   When on line zero check the column is valid for line one.

diff --git a/src/ex_docmd.c b/src/ex_docmd.c
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -3411,10 +3411,13 @@ parse_cmd_address(exarg_T *eap, char **e
 		curwin->w_cursor.lnum = eap->line2;
 
 		// Don't leave the cursor on an illegal line or column, but do
-		// accept zero as address, so 0;/PATTERN/ works correctly.
+		// accept zero as address, so 0;/PATTERN/ works correctly
+		// (where zero usually means to use the first line).
 		// Check the cursor position before returning.
 		if (eap->line2 > 0)
 		    check_cursor();
+		else
+		    check_cursor_col();
 		need_check_cursor = TRUE;
 	    }
 	}
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -808,6 +808,14 @@ func Test_illegal_address2()
   call delete('Xtest.vim')
 endfunc
 
+func Test_mark_from_line_zero()
+  " this was reading past the end of the first (empty) line
+  new
+  norm oxxxx
+  call assert_fails("0;'(", 'E20:')
+  bwipe!
+endfunc
+
 func Test_cmdline_complete_wildoptions()
   help
   call feedkeys(":tag /\<c-a>\<c-b>\"\<cr>", 'tx')
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    5150,
+/**/
     5149,
 /**/
     5148,