patch 9.1.0121: Infinite loop or signed overflow with 'smoothscroll' Commit: https://github.com/vim/vim/commit/02fcae02a926e4e8379d77fb716da4202029882d Author: Sean Dewar <6256228+seandewar@users.noreply.github.com> Date: Wed Feb 21 19:40:44 2024 +0100 patch 9.1.0121: Infinite loop or signed overflow with 'smoothscroll' Problem: infinite loop in win_update with 'smoothscroll' set when window width is equal to textoff, or signed integer overflow if smaller. Solution: don't revalidate wp->w_skipcol in that case, as no buffer text is being shown. (Sean Dewar) Don't instead reset w_skipcol; that would lose the scroll position within the line, which may be undesirable if the window is made wider later. Also include changes from the splitmove PR #14042 that I (in my infinite Git wisdom) forgot to commit. This includes a change to Test_window_split_no_room to ensure it doesn't fail for some screen sizes. Move Test_smoothscroll_in_zero_width_window to test_scroll_opt.vim, as that file feels more appropriate. closes: #14068 Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>

Inserts 2 million lines with consecutive integers starting from 1
(essentially, the output of GNU's seq 1 2000000), writes them to Xtest
and writes its cksum to test.out.

We need 2 million lines to trigger a call to mf_hash_grow().  If it would mess
up the lines the checksum would differ.

cksum is part of POSIX and so should be available on most Unixes.
If it isn't available then the test will be skipped.

VMS does not have CKSUM but has a built in CHECKSUM - it should be used
STARTTEST
:silent! while 0
:  e! test.ok
:  w! test.out
:  qa!
:silent! endwhile
:if !has("vms")
: e! test.ok
: w! test.out
: qa!
:endif
:set fileformat=unix undolevels=-1
ggdG
:let i = 1
:while i <= 2000000 | call append(i, range(i, i + 99)) | let i += 100 | endwhile
ggdd
:w! Xtest.
:r !@test77a.com Xtest.
:s/\s/ /g
:set fileformat&
:.w! test.out
:qa!
ENDTEST