Bug#1082537: gtk4: after 4.14.4+ds-8 -> 4.16.1+ds-2, parlatype leaks memory

[franck]

Source: gtk4
Version: 4.16.1+ds-2
Severity: grave
Justification: causes non-serious data loss
X-Debbugs-Cc: franckr01 at online.de

Dear Maintainer,

After upgrading sid for:
[UPGRADE] gtk-update-icon-cache:amd64 3.24.43-3 -> 4.16.1+ds-2
[UPGRADE] libadwaita-1-0:amd64 1.5.3-1 -> 1.6.0-1
[UPGRADE] libgtk-4-1:amd64 4.14.4+ds-8 -> 4.16.1+ds-2
[UPGRADE] libgtk-4-bin:amd64 4.14.4+ds-8 -> 4.16.1+ds-2
[UPGRADE] libgtk-4-common:amd64 4.14.4+ds-8 -> 4.16.1+ds-2
[UPGRADE] libgtk-4-media-gstreamer:amd64 4.14.4+ds-8 -> 4.16.1+ds-2

Parlatype started to leak memory:
Playing a <3min audio leads to filling up a 32GB computer memory (mostly free before playing audio).
Then OOM-killer killed X session => data loss risk.

Reverting to
gtk-update-icon-cache:amd64 3.24.43-3
libadwaita-1-0:amd64 1.5.3-1
libgtk-4-1:amd64 4.14.4+ds-8
libgtk-4-bin:amd64 4.14.4+ds-8
libgtk-4-common:amd64 4.14.4+ds-8
libgtk-4-media-gstreamer:amd64 4.14.4+ds-8
solves the issue: Parlatype does not leak memory anymore.

Thus I filled this bug to gtk4.

FYI: ii  parlatype      4.2-2        amd64        Minimal audio player for manual speech transcription

Thanks,
Franck

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.10.9-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled