Package: transmission-gtk
Version: 4.1.1+dfsg-1~bpo13+1
Severity: normal
X-Debbugs-Cc: [email protected]
Dear Maintainer,
**transmission-gtk crashes with `unordered_map::at` when interacting with
scheduled speed limits in preferences**
I upgraded to the backports version (4.1.1) because the trixie main package
(4.1.0~beta2) was missing the transmission icon in the dash-to-panel GNOME
extension. Unfortunately 4.1.1 introduces this crash.
# Steps to reproduce
1. Open transmission-gtk with active torrents
2. Open Edit > Preferences > Speed
3. Interact repeatedly with any control in the "Scheduled times" section
(checkbox, start time, end time, day-of-week)
4. Crash occurs, sometimes after a few interactions
The crash also occurs when the scheduled time fires automatically.
This feature is especially useful where metered data includes
differently-priced "night-owl" data.
# Expected behaviour
Scheduled speed limit controls should work without crashing.
# Actual behaviour
```
** (transmission-gtk:XXXXX): ERROR **: unhandled exception (type
std::exception) in signal handler:
what: unordered_map::at
Trace/breakpoint trap
```
# Backtrace
Obtained via `gdb -ex "catch throw" -ex run --args transmission-gtk`, with
debug symbols from the `trixie-backports-debug` repository:
```
#0 __cxa_throw () from libstdc++.so.6
#1 std::__throw_out_of_range(char const*) () from libstdc++.so.6
#2 std::__detail::_Map_base<...>::at (this=<key_to_action>) at
hashtable_policy.h:399
#3 std::unordered_map<Glib::ustring, std::shared_ptr<Gio::SimpleAction>>::at
(...)
at unordered_map.h:1005
#4 (anonymous namespace)::get_action (name=...) at ./gtk/Actions.cc:181
#5 gtr_action_set_toggled (name=..., is_toggled=false) at
./gtk/Actions.cc:198
#6 Application::Impl::on_prefs_changed (this=..., key=...) at
./gtk/Application.cc:1301
#7 sigc::signal emit
#8 Session::Impl::commit_prefs_change (...) at ./gtk/Session.cc:1148
```
# Notes
`Actions.cc:183` has no missing-key guard:
```
$ grep -n 'key_to_action.at\|key_to_action.find' gtk/Actions.cc
183: return key_to_action.at(name);
```
The action is registered under a hyphenated name in `Actions.cc`, but
`Application.cc` looks it up via the raw libtransmission quark string (which
uses underscores):
```
$ grep -n 'alt.speed.enabled' gtk/Actions.cc gtk/Application.cc
Actions.cc:73: "alt-speed-enabled"sv,
Application.cc:1302: case TR_KEY_alt_speed_enabled:
Application.cc:1306:
gtr_action_set_toggled(std::string(tr_quark_get_string_view(key)), b);
```
# Workaround
Do not use the scheduled times feature until this is fixed.
## Version information
- transmission-gtk 4.1.1+dfsg-1~bpo13+1 (Debian trixie-backports) — **affected**
- transmission-gtk 4.1.0~beta2+dfsg-3+deb13u1 (Debian trixie main) — not
reproduced
- Both packages link against the same GTK4 4.18.6 and libglibmm-2.68
- Debian trixie (x86_64)
-- System Information:
Debian Release: 13.4
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500,
'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.12.74+deb13+1-amd64 (SMP w/8 CPU threads; PREEMPT)
Locale: LANG=en_ZA.UTF-8, LC_CTYPE=en_ZA.UTF-8 (charmap=UTF-8),
LANGUAGE=en_ZA:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages transmission-gtk depends on:
ii libb64-0d 1.2-5+b3
ii libc6 2.41-12+deb13u2
ii libcurl4t64 8.14.1-2+deb13u2
ii libdeflate0 1.23-2
ii libevent-core-2.1-7t64 2.1.12-stable-10+b1
ii libevent-extra-2.1-7t64 2.1.12-stable-10+b1
ii libgcc-s1 14.2.0-19
ii libglib2.0-0t64 2.84.4-3~deb13u2
ii libglibmm-2.68-1t64 2.84.0-1
ii libgtk-4-1 4.18.6+ds-2
ii libgtkmm-4.0-0 4.18.0-1
ii libminiupnpc18 2.2.8-2+b2
ii libnatpmp1t64 20230423-1.2+b3
ii libpangomm-2.48-1t64 2.56.1-1
ii libpsl5t64 0.21.2-1.1+b1
ii libsigc++-3.0-0 3.6.0-2+b1
ii libssl3t64 3.5.5-1~deb13u1
ii libstdc++6 14.2.0-19
ii transmission-common 4.1.1+dfsg-1~bpo13+1
Versions of packages transmission-gtk recommends:
ii xdg-utils 1.2.1-2
transmission-gtk suggests no packages.
-- no debconf information
