AI turn never ending

[nmaggioni]

The screen says "CPU Turn" and the progress bar is stuck at the first segment. It's been more than 10 minutes and the animations are still playing, but the game makes no progress whatsoever. Looking at the console output is seems to be looping on these errors:

ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
   At: scene/main/node.cpp:1747.
ERROR: remove_child: Condition ' idx==-1 ' is true.
   At: scene/main/node.cpp:729.
ERROR: remove_child: Condition ' idx==-1 ' is true.
   At: scene/main/node.cpp:729.
ERROR: add_child: Condition ' p_child->data.parent ' is true.
   At: scene/main/node.cpp:666.
ERROR: move_child: Condition ' p_child->data.parent!=this ' is true.
   At: scene/main/node.cpp:257.
ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
   At: scene/main/node.cpp:1747.

I'm playing the 3rd mission, if that can be useful.

[czlowiekimadlo]

Hi nmaggioni, thank you for your report. We are aware of this issue. The AI is repeatedly trying to perform invalid move order, and it locks it down.

Until we fix this, there is a workaround: you have to go to skirmish menu, select any map, change opponent to Human. Then, instead of starting new match, go back to campaign and it will be unstuck. Then repeat it again to switch the opponent back to CPU.

[muelli]

I get a slightly different log output, but similar enough for me to attach it to this bug:

I/godot   ( 4505): FPS: 4
I/godot   ( 4505): ERROR: remove_child: Condition ' idx==-1 ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:729.
I/godot   ( 4505): ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:1747.
I/godot   ( 4505): FPS: 11
I/godot   ( 4505): FPS: 3
I/godot   ( 4505): FPS: 4
I/godot   ( 4505): ERROR: remove_child: Condition ' idx==-1 ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:729.
I/godot   ( 4505): ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:1747.
I/godot   ( 4505): FPS: 11
I/godot   ( 4505): FPS: 4
I/godot   ( 4505): FPS: 4
I/godot   ( 4505): ERROR: remove_child: Condition ' idx==-1 ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:729.
I/godot   ( 4505): ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:1747.
I/godot   ( 4505): FPS: 11
I/godot   ( 4505): FPS: 3
I/godot   ( 4505): FPS: 3
I/godot   ( 4505): ERROR: remove_child: Condition ' idx==-1 ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:729.
I/godot   ( 4505): ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:1747.
I/godot   ( 4505): FPS: 14
I/godot   ( 4505): FPS: 4
I/godot   ( 4505): ERROR: remove_child: Condition ' idx==-1 ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:729.
I/godot   ( 4505): ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:1747.
I/godot   ( 4505): FPS: 14
I/godot   ( 4505): FPS: 3
I/godot   ( 4505): FPS: 5
I/godot   ( 4505): ERROR: remove_child: Condition ' idx==-1 ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:729.
I/godot   ( 4505): ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:1747.
I/godot   ( 4505): FPS: 12
I/godot   ( 4505): FPS: 3
I/godot   ( 4505): ERROR: remove_child: Condition ' idx==-1 ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:729.
I/godot   ( 4505): FPS: 11
I/godot   ( 4505): ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:1747.
I/godot   ( 4505): FPS: 7
I/godot   ( 4505): FPS: 4
I/godot   ( 4505): ERROR: remove_child: Condition ' idx==-1 ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:729.
I/godot   ( 4505): ERROR: queue_delete: Condition ' !is_inside_tree() ' is true.
I/godot   ( 4505):    At: scene/main/node.cpp:1747.
I/godot   ( 4505): FPS: 13

[czlowiekimadlo]

We have released new update, that should resolve AI freezing issues. We will perform more tests before I close this ticket.

As for the console output, these errors are caused by the nodes tree trying to remove a child, that is no longer there (like removing some menu panel every time we want to clear the screen, even if it is not visible and not there). It is not connected with AI issues. We might come around and fix that at some point, but it is a low priority, as it appears to not impact the game in any way.

[sviscapi]

Hi :)

Your latest 0.4.0.2-beta still suffers from that bug, at least on the Open Pandora port:

https://pyra-handheld.com/boards/threads/tanks-of-freedom-0-4-0-3.75668/page-2#post-1363666

Cheers, Sam a.k.a "Magic Sam" on the boards ;)

[czlowiekimadlo]

Yeah, we know. We have found another, potential cause for this and patched it, so we will make 0.4.0.3-beta today.

[czlowiekimadlo]

OK, so I've been able to reproduce this once, but then it kind of dissapeared when I added some debug. I will try to catch it again.

[czlowiekimadlo]

Can't reproduce it on current code, but can on 0.4.0.2 tag, so maybe I had older code when I tried.

[jkufner]

When AI performs an invalid turn, it should remove some high amount of action points. Then turn will end sooner or later and game can continue. Of course, such event should be logged and fixed, but it will not break the game (execept AI will loose a turn).