Bug#991460: vcmi: aborts when hovering over campaign selection figures

[fulvio ciriaco]

Package: vcmi
Version: 0.99+dfsg+git20190113.f06c8a87-2+b1
Severity: important

steps to reproduce:
1. select new  -> campaign
2. move the mouse to select the campaign
vcmi aborts immediately with the following message:

Initializing VCMI_Lib: 313 ms
Screen handler: 8 ms
Main graphics: 103 ms
Message handler: 1 ms
Initialization of VCMI (together): 1126 ms
corrupted double-linked list

it happens on different computers, motherboards and graphic cards.
as a workaround, it is possible to select a campaign opening vcmi in valgrind (very
slow), saving the first day and reopening normally. 

thank you

-- System Information:
Debian Release: 11.0
  APT prefers testing-security
  APT policy: (500, 'testing-security'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-7-amd64 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_WARN
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages vcmi depends on:
ii  libavcodec58                    7:4.3.2-0+deb11u2
ii  libavformat58                   7:4.3.2-0+deb11u2
ii  libavutil56                     7:4.3.2-0+deb11u2
ii  libboost-filesystem1.74.0       1.74.0-9
ii  libboost-locale1.74.0           1.74.0-9
ii  libboost-program-options1.74.0  1.74.0-9
ii  libboost-thread1.74.0           1.74.0-9
ii  libc6                           2.31-12
ii  libfuzzylite6.0                 6.0+dfsg-3
ii  libgcc-s1                       10.2.1-6
ii  libminizip1                     1.1-8+b1
ii  libqt5core5a                    5.15.2+dfsg-9
ii  libqt5gui5                      5.15.2+dfsg-9
ii  libqt5network5                  5.15.2+dfsg-9
ii  libqt5widgets5                  5.15.2+dfsg-9
ii  libsdl2-2.0-0                   2.0.14+dfsg2-3
ii  libsdl2-image-2.0-0             2.0.5+dfsg1-2
ii  libsdl2-mixer-2.0-0             2.0.4+dfsg1-3
ii  libsdl2-ttf-2.0-0               2.0.15+dfsg1-1
ii  libstdc++6                      10.2.1-6
ii  libswscale5                     7:4.3.2-0+deb11u2
ii  zlib1g                          1:1.2.11.dfsg-2

Versions of packages vcmi recommends:
ii  ffmpeg       7:4.3.2-0+deb11u2
ii  innoextract  1.8-1.2+b1
ii  unshield     1.4.2-1
ii  unzip        6.0-26

Versions of packages vcmi suggests:
pn  homm3-demo-data | homm3-data  <none>

-- no debconf information