[0.15.14] Crash research finished & click next research

[hans]

Game crashes on this save.

Happens when research finishes and I click the last level of requester slots research.

No mods used in this save game.

Attached is save file, with factorio logs.

[hans]

To clarify:

- Wait for research done popup for Character logistics slots 5
- Click on the next research slots 6 in the 'tree' view.
- Crash

But also:

- Wait for popup
- Close popup
- Open research window again
- Click on level 6 on left panel
- Then click on level 5 (which was just done!) in tree view

Strangely it doesn't happen when:
- Wait for popup
- Click on level 6
- Then in tree click on level 5 again.

I suppose there is something misbehaving in the UI navigation logic, there are probably more permutations.

[mward]

This might be the same bug. No mods are installed. I am on Linux 4.4.68

To reproduce the crash:

1 Load the save file S01.zip
2 Press T to bring up research
3 Click on laser (which is unavailable) see that it needs plastic
4 Click on plastic
5 Crash!

[Oxyd]

Most likely same as this bug which should be fixed in 0.15.15.