apport: FileNotFoundError in _add_executable_timestamp on ExecutablePath

[errors.ubuntu.com bug bridge]

[Original report]
```
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 1253, in <module>
    sys.exit(main(sys.argv[1:]))
             ~~~~^^^^^^^^^^^^^^
  File "/usr/share/apport/apport", line 762, in main
    return process_crash_from_systemd_coredump(options.systemd_coredump_instance)
  File "/usr/share/apport/apport", line 1246, in process_crash_from_systemd_coredump
    report = apport.report.Report.from_systemd_coredump(coredump)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 2082, in from_systemd_coredump
    report._add_executable_timestamp()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/apport/report.py", line 815, in _add_executable_timestamp
    self["ExecutableTimestamp"] = str(int(os.stat(self["ExecutablePath"]).st_mtime))
                                          ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/.mount_jetbraMkhivj/jetbrains-toolbox'
```

The Ubuntu Error Tracker has been receiving reports about a problem regarding apport. This problem was most recently seen with package version 2.31.0-0ubuntu4, the problem page at https://errors.ubuntu.com/problem/de11995c45fc4b1c7cc769a55d31533f6f9d8b51 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

[ Impact ]

* This is bug #4 for noble: https://errors.ubuntu.com/?release=Ubuntu%2024.04&package=apport&period=month
* apport: FileNotFoundError in _add_executable_timestamp on ExecutablePath:

```
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 1253, in <module>
    sys.exit(main(sys.argv[1:]))
             ~~~~^^^^^^^^^^^^^^
  File "/usr/share/apport/apport", line 762, in main
    return process_crash_from_systemd_coredump(options.systemd_coredump_instance)
  File "/usr/share/apport/apport", line 1246, in process_crash_from_systemd_coredump
    report = apport.report.Report.from_systemd_coredump(coredump)
  File "/usr/lib/python3/dist-packages/apport/report.py", line 2082, in from_systemd_coredump
    report._add_executable_timestamp()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/apport/report.py", line 815, in _add_executable_timestamp
    self["ExecutableTimestamp"] = str(int(os.stat(self["ExecutablePath"]).st_mtime))
                                          ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/.mount_jetbraMkhivj/jetbrains-toolbox'
```

* The upload fixes the bug as https://github.com/canonical/apport/pull/538 adds a try-catch for FileNotFoundError and sets ExecutableTimestamp to an error message.

[ Test Plan ]

 * This crash can be reproduced with systemd-coredump installed:

```
cp /usr/bin/sleep /tmp/sleep
/tmp/sleep 3600
killall -11 sleep
```

This is caused by /usr/lib/systemd/system/apport-coredump-hook@.service having:

```
PrivateTmp=yes
```

 * https://github.com/canonical/apport/pull/538 also introduced a unit test for this.

[ Where problems could occur ]

 * We are modifying the conditions for checking if a binary has changed since the crash so a syntax error or a logical error in the condition can lead to buggy behavior.

 * Since apport is primarily for crash reports, user experience is unlikely to be affected much.

[Benjamin Drung (bdrung)]

We should probably stat /proc/<pid>/exe because that even works on deleted executables.

[Benjamin Drung (bdrung)]

This one is reproducible with systemd-coredump installed:

```
cp /usr/bin/sleep /tmp/sleep
/tmp/sleep 3600
killall -11 sleep
```

This is caused by /usr/lib/systemd/system/apport-coredump-hook@.service having:

```
PrivateTmp=yes
```

[Benjamin Drung (bdrung)]

Proposed fix: https://github.com/canonical/apport/pull/538

[Benjamin Drung (bdrung)]

https://github.com/canonical/apport/pull/538 got merged.

[Benjamin Drung (bdrung)]

This is also bug #4 for noble: https://errors.ubuntu.com/?release=Ubuntu%2024.04&package=apport&period=month

[Launchpad Janitor (janitor)]

This bug was fixed in the package apport - 2.33.1-0ubuntu1

---------------
apport (2.33.1-0ubuntu1) questing; urgency=medium

  * New upstream release
    - report:
      + check for errors in ProcMaps in crash_signature_addresses (LP: #2114171)
      + Handle FileNotFoundError when determining ExecutableTimestamp
        (LP: #2098792)
    - apport: Do not hide FileNotFoundError during crash handling
    - test: use true from GNU coreutils (LP: #2111595)

 -- Benjamin Drung <email address hidden> Fri, 04 Jul 2025 21:40:18 +0200