[Bug 1762159] [NEW] apport-gtk crashes on reports without timestamp

[Bart Goeman]

Public bug reported:

$ /usr/share/apport/apport-gtk
Traceback (most recent call last):
  File "/usr/share/apport/apport-gtk", line 598, in <module>
    app.run_argv()
  File "/usr/lib/python3/dist-packages/apport/ui.py", line 694, in run_argv
    return self.run_crashes()
  File "/usr/lib/python3/dist-packages/apport/ui.py", line 245, in run_crashes
    logind_session[1] > self.report.get_timestamp():
TypeError: '>' not supported between instances of 'float' and 'NoneType'

/usr/lib/python3/dist-packages/apport/report.py:

    def get_timestamp(self):
        '''Get timestamp (seconds since epoch) from Date field

        Return None if it is not present.
        '''

so get_timestamp can return None, but run_crashes does not cover this

$ dpkg -s python3-apport
Package: python3-apport
Status: install ok installed
Priority: optional
Section: python
Installed-Size: 551
Maintainer: Martin Pitt <martin.pitt at ubuntu.com>
Architecture: all
Source: apport
Version: 2.20.7-0ubuntu3.7

$ lsb_release -rd
Description:	Ubuntu 17.10
Release:	17.10

** Affects: apport (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1762159

Title:
  apport-gtk crashes on reports without timestamp

Status in apport package in Ubuntu:
  New

Bug description:
  $ /usr/share/apport/apport-gtk
  Traceback (most recent call last):
    File "/usr/share/apport/apport-gtk", line 598, in <module>
      app.run_argv()
    File "/usr/lib/python3/dist-packages/apport/ui.py", line 694, in run_argv
      return self.run_crashes()
    File "/usr/lib/python3/dist-packages/apport/ui.py", line 245, in run_crashes
      logind_session[1] > self.report.get_timestamp():
  TypeError: '>' not supported between instances of 'float' and 'NoneType'

  /usr/lib/python3/dist-packages/apport/report.py:

      def get_timestamp(self):
          '''Get timestamp (seconds since epoch) from Date field

          Return None if it is not present.
          '''

  so get_timestamp can return None, but run_crashes does not cover this

  $ dpkg -s python3-apport
  Package: python3-apport
  Status: install ok installed
  Priority: optional
  Section: python
  Installed-Size: 551
  Maintainer: Martin Pitt <martin.pitt at ubuntu.com>
  Architecture: all
  Source: apport
  Version: 2.20.7-0ubuntu3.7

  $ lsb_release -rd
  Description:	Ubuntu 17.10
  Release:	17.10

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