# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1644680703 -3600
# Node ID 289e87a783072740fa8fab4a0cb4b80aaab7aede
# Parent  c86e351c8464ce06e94ad0740eaf6a74ca542601
patch 8.2.4359: crash when repeatedly using :retab

Commit: https://github.com/vim/vim/commit/6e28703a8e41f775f64e442c5d11ce1ff599aa3f
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sat Feb 12 15:42:18 2022 +0000

    patch 8.2.4359: crash when repeatedly using :retab

    Problem:    crash when repeatedly using :retab.
    Solution:   Bail out when the line is getting too long.

diff --git a/src/indent.c b/src/indent.c
--- a/src/indent.c
+++ b/src/indent.c
@@ -1750,6 +1750,11 @@ ex_retab(exarg_T *eap)
 	    if (ptr[col] == NUL)
 		break;
 	    vcol += chartabsize(ptr + col, (colnr_T)vcol);
+	    if (vcol >= MAXCOL)
+	    {
+		emsg(_(e_resulting_text_too_long));
+		break;
+	    }
 	    if (has_mbyte)
 		col += (*mb_ptr2len)(ptr + col);
 	    else
diff --git a/src/testdir/test_retab.vim b/src/testdir/test_retab.vim
--- a/src/testdir/test_retab.vim
+++ b/src/testdir/test_retab.vim
@@ -70,6 +70,8 @@ func Test_retab()
   call assert_equal("    a       b        c    ",         Retab('!', 3))
   call assert_equal("    a       b        c    ",         Retab('',  5))
   call assert_equal("    a       b        c    ",         Retab('!', 5))
+
+  set tabstop& expandtab&
 endfunc
 
 func Test_retab_error()
@@ -80,4 +82,21 @@ func Test_retab_error()
   call assert_fails('ret 80000000000000000000', 'E475:')
 endfunc
 
+func Test_retab_endless()
+  new
+  call setline(1, "\t0\t")
+  let caught = 'no'
+  try
+    while 1
+      set ts=4000
+      retab 4
+    endwhile
+  catch /E1240/
+    let caught = 'yes'
+  endtry
+  bwipe!
+  set tabstop&
+endfunc
+
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4359,
+/**/
     4358,
 /**/
     4357,