Traceback closing tab with changes

[Adam Collard]

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/meld/meldwindow.py", line 537, in <lambda>
    icon, "", lambda b: page.on_delete_event())
  File "/usr/lib/python3/dist-packages/meld/filediff.py", line 842, in on_delete_event
    del self._cached_match
AttributeError: _cached_match

Hit after using the editable text area to adjust a changed line, and then save changes and close the 'tab'

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: meld 3.18.0-6
ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
Uname: Linux 4.15.0-45-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Feb 7 15:10:02 2019
InstallationDate: Installed on 2015-07-04 (1314 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
SourcePackage: meld
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Guilhem (logik13)]

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/meld/filediff.py", line 1559, in file_saved_cb
    self.on_delete_event()
  File "/usr/lib/python3/dist-packages/meld/filediff.py", line 842, in on_delete_event
    del self._cached_match
AttributeError: _cached_match

To reproduce :
- Compare folders
- Open one difference
- Make a change
- Try to close tab
Whatever you do after, you cannot close tab anymore (traceback appears). If I save the file *before* closing the tab, it works. It seems related to the save dialog.

[Nathaniel Beaver (nathanielmbeaver)]

Probably duplicate of https://bugs.launchpad.net/ubuntu/+source/meld/+bug/1768369

[Manuel Barallobre (bara666)]

In meld (3.18.2-1) the bug is solved

[Alexis Wilke (alexis-m2osw)]

For those interested in 18.04, the file to replace is:

/usr/lib/python3/dist-packages/meld/filediff.py

and you can replace it with the version:

https://gitlab.gnome.org/GNOME/meld/-/blob/3.18.2/meld/filediff.py

Then saving when closing the tab works as expected.