patch 9.1.0069: ScreenLines may not be correctly initialized, causing hang Commit: https://github.com/vim/vim/commit/fd472655a93fd539c731c8daf3adc4e65ddce341 Author: Olaf Seibert <rhialto@falu.nl> Date: Thu Feb 1 21:11:16 2024 +0100 patch 9.1.0069: ScreenLines may not be correctly initialized, causing hang Problem: ScreenLines may not be correctly initialized, causing hang (Olaf Seibert, after 9.0.0220) Solution: always initialize ScreneLines when allocating a screen (Olaf Seibert) ScreenLines and related structures could be left uninitialized causing a screen update to run into an infinite loop when using latin1 encoding. Partly caused because by patch 9.0.0220, which makes mb_ptr2len return zero for NUL related: #12671 closes: #13946 Signed-off-by: Olaf Seibert <rhialto@falu.nl> Signed-off-by: Christian Brabandt <cb@256bit.org>

# Test of cursor-control characters inside ESC sequences
INIT
WANTSTATE
WANTSCREEN

RESET

PUSH "A B C D E F G H I"
PUSH "\x0d\x0a"
PUSH "A\e[2\bCB\e[2\bCC\e[2\bCD\e[2\bCE\e[2\bCF\e[2\bCG\e[2\bCH\e[2\bCI"
PUSH "\x0d\x0a"
PUSH "A \e[\x0d2CB\e[\x0d4CC\e[\x0d6CD\e[\x0d8CE\e[\x0d10CF\e[\x0d12CG\e[\x0d14CH\e[\x0d16CI"
PUSH "\x0d\x0a"
PUSH "A \e[1\x0bAB \e[1\x0bAC \e[1\x0bAD \e[1\x0bAE \e[1\x0bAF \e[1\x0bAG \e[1\x0bAH \e[1\x0bAI \e[1\x0bA"

!Output

$SEQ 0 2: ?screen_row \# = "A B C D E F G H I"
          ?screen_row  3 = "A B C D E F G H I "

?cursor = 3,18