Bug#1067679: libvte-2.91-0: backspace character (code 8) output at the end of a line goes 2 columns backward

[Vincent Lefevre]

Package: libvte-2.91-0
Version: 0.75.92-1
Severity: normal

A backspace character (code 8) output at the end of a physical line
goes 2 columns backward.

For instance, in a 80-column libvte-based terminal (such as
GNOME Terminal or Sakura), I get

$ for i in $(seq 4 $(tput cols)) ; do printf "." ; done ; printf "ab \bc\n"
.............................................................................ac

Xterm does not have such an issue:

$ for i in $(seq 4 $(tput cols)) ; do printf "." ; done ; printf "ab \bc\n"
.............................................................................abc

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'proposed-updates-debug'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.6.15-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libvte-2.91-0 depends on:
ii  libatk1.0-0t64       2.51.90-4
ii  libc6                2.37-15.1
ii  libcairo-gobject2    1.18.0-1+local1
ii  libcairo2            1.18.0-1+local1
ii  libfribidi0          1.0.13-3+b1
ii  libgcc-s1            14-20240315-1
ii  libglib2.0-0t64      2.78.4-6
ii  libgnutls30t64       3.8.3-1.1+b1
ii  libgtk-3-0t64        3.24.41-3
ii  libicu72             72.1-4+b1
ii  liblz4-1             1.9.4-1+b2
hi  libpango-1.0-0       1.51.0+ds-4
hi  libpangocairo-1.0-0  1.51.0+ds-4
ii  libpcre2-8-0         10.42-4+b1
ii  libstdc++6           14-20240315-1
ii  libsystemd0          255.4-1+b1
ii  libvte-2.91-common   0.75.92-1

libvte-2.91-0 recommends no packages.

libvte-2.91-0 suggests no packages.

-- no debconf information

-- 
Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)