Package: thunderbird
Version: 1:140.14.0esr-1~deb13u1
Severity: important

Dear Maintainer,

after upgrading Thunderbird from 1:140.13.0esr-2~deb13u1 to
1:140.14.0esr-1~deb13u1, Thunderbird crashes reproducibly when
performing drag-and-drop operations across application/window
boundaries.

The problem occurs, for example, in both of the following cases:

1. Dragging an e-mail message from Thunderbird to another application
   (Firefox in my test case).

2. Dragging an attachment from an e-mail in Thunderbird to the file
   manager.

Thunderbird crashes as soon as the drag-and-drop operation is
performed. The issue is reproducible in an XFCE desktop session
running via XRDP using X11.

Terminal output at the time of the crash includes:

[GFX1-]: RenderCompositorSWGL failed mapping default framebuffer, no dt
ExceptionHandler::GenerateDump minidump generation succeeded
Exiting due to channel error.

In one test the following additional graphics error was reported:

Crash Annotation GraphicsCriticalError: |[C0][GFX1-]:
CompositorBridgeChild receives IPC close with reason=AbnormalShutdown

I performed the following tests with 1:140.14.0esr-1~deb13u1:

* Normal mode: reproducible crash.
* --safe-mode: reproducible crash.
* MOZ_WEBRENDER=0: reproducible crash.
* MOZ_DISABLE_RDD_SANDBOX=1 MOZ_WEBRENDER=0: reproducible crash.
* XFWM compositing disabled: reproducible crash.

Most importantly, I then downgraded only Thunderbird to:

1:140.13.0esr-2~deb13u1

using the previous Debian package from my local APT cache.

With Thunderbird 140.13.0esr, the same drag-and-drop operations work
normally and reproducibly without any crash.

The upgrade from 140.13.0esr to 140.14.0esr therefore appears to
introduce a regression affecting drag-and-drop in this X11/XFCE/XRDP
environment.

Environment:

* Debian 13 (trixie)
* XFCE
* X11
* XRDP remote desktop session
* amd64
* Thunderbird installed from the official Debian package
* affected version: 1:140.14.0esr-1~deb13u1
* last known working version: 1:140.13.0esr-2~deb13u1

Thunderbird generated a minidump for every reproduced crash. I can
provide the corresponding .dmp and .extra files if useful.

For the time being I have downgraded Thunderbird to 140.13.0esr and
placed the package on hold, as this restores working drag-and-drop.

Please let me know if additional diagnostics, crash dumps, or tests
are required.

Kind regards,
Lorenz


-- System Information:
Debian Release: 13.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.105+deb13-amd64 (SMP w/64 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, 
TAINT_UNSIGNED_MODULE
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.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 thunderbird depends on:
ii  debianutils          5.23.2
ii  fontconfig           2.15.0-2.3
ii  kdialog              4:25.04.0-1
ii  libasound2t64        1.2.14-1
ii  libatk1.0-0t64       2.56.2-1+deb13u1
ii  libc6                2.41-12+deb13u3
ii  libcairo-gobject2    1.18.4-1+b1
ii  libcairo2            1.18.4-1+b1
ii  libdbus-1-3          1.16.2-2
ii  libevent-2.1-7t64    2.1.12-stable-10+b1
ii  libffi8              3.4.8-2
ii  libfontconfig1       2.15.0-2.3
ii  libfreetype6         2.13.3+dfsg-1+deb13u1
ii  libgcc-s1            14.2.0-19
ii  libgdk-pixbuf-2.0-0  2.42.12+dfsg-4+deb13u1
ii  libglib2.0-0t64      2.84.4-3~deb13u3
ii  libgtk-3-0t64        3.24.49-3
ii  libnspr4             2:4.36-1
ii  libotr5t64           4.1.1-6
ii  libpango-1.0-0       1.56.3-1
ii  librnp0              0.17.1-1+b1
ii  libstdc++6           14.2.0-19
ii  libvpx9              1.15.0-2.1+deb13u1
ii  libx11-6             2:1.8.12-1
ii  libx11-xcb1          2:1.8.12-1
ii  libxcb-shm0          1.17.0-2+b1
ii  libxcb1              1.17.0-2+b1
ii  libxext6             2:1.3.4-1+b3
ii  libxrandr2           2:1.5.4-1+b3
ii  psmisc               23.7-2
ii  x11-utils            7.7+7
ii  zenity               4.1.90-1
ii  zlib1g               1:1.3.dfsg+really1.3.1-1+b1

Versions of packages thunderbird recommends:
ii  hunspell-ar [hunspell-dictionary]            3.5.2014-11-08-5
ii  hunspell-be [hunspell-dictionary]            0.60-1
ii  hunspell-bg [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-bs [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-ca [hunspell-dictionary]            3.0.9+repack1-2
ii  hunspell-cs [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-da [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-de-at [hunspell-dictionary]         20161207-15
ii  hunspell-de-ch [hunspell-dictionary]         20161207-15
ii  hunspell-de-de [hunspell-dictionary]         20161207-15
ii  hunspell-el [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-en-gb [hunspell-dictionary]         1:25.2.3-1
ii  hunspell-en-us [hunspell-dictionary]         1:2020.12.07-4
ii  hunspell-eo [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-eu [hunspell-dictionary]            5.4.10-1
ii  hunspell-fr-classical [hunspell-dictionary]  1:7.0-3
ii  hunspell-gl [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-gu [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-hi [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-hr [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-hu [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-id [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-is [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-it [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-kk [myspell-dictionary]             1.1.2-2
ii  hunspell-kmr [hunspell-dictionary]           1:25.2.3-1
ii  hunspell-ko [hunspell-dictionary]            0.7.94-2
ii  hunspell-lt [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-lv [hunspell-dictionary]            1.4.0-5
ii  hunspell-ne [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-nl [hunspell-dictionary]            2:2.20.19+1-3
ii  hunspell-pl [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-pt-br [hunspell-dictionary]         1:25.2.3-1
ii  hunspell-pt-pt [hunspell-dictionary]         1:25.2.3-1
ii  hunspell-ro [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-ru [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-si [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-sl [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-sr [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-sv [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-te [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-th [hunspell-dictionary]            1:25.2.3-1
ii  hunspell-vi [hunspell-dictionary]            1:25.2.3-1
ii  myspell-es [myspell-dictionary]              1.11-20
ii  myspell-et [myspell-dictionary]              1:20030606-32
ii  myspell-fa [myspell-dictionary]              0.20070816-3.2
ii  myspell-ga [myspell-dictionary]              2.0-27.1
ii  myspell-he [myspell-dictionary]              1.4-3.1
ii  myspell-nb [myspell-dictionary]              2.2-4
ii  myspell-nn [myspell-dictionary]              2.2-4
ii  myspell-sk [myspell-dictionary]              0.5.5a-2.4
ii  myspell-sq [myspell-dictionary]              1.6.4-1.2
ii  myspell-uk [myspell-dictionary]              1.8.0+dfsg-1

Versions of packages thunderbird suggests:
ii  apparmor          4.1.0-1
pn  fonts-lyx         <none>
ii  libgssapi-krb5-2  1.21.3-5+deb13u1

-- no debconf information

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