Hirundo opened the ticket and wrote:

bug exists in r21153+, when loading an older (pre-21153) savegame.

The problem is that the saveload conversion assumes a normal vehicle motion. So, if a train (entering a tunnel) is invisible while it should still be visible, no further action is taken because the problem will solve itself in a few ticks. Except... when you reverse the train before that.

Attached is a savegame that demonstrates this. To reproduce the bug:
- Reverse one of the two trains (both show different, buggy behaviour)
- Start said train
- Watch

In the case of train 1, be sure to stop or reverse the train before it reaches the map edge (!).

Attachments

• Pronhattan Transport, 15th Jul 1950.sav (25.75 KiB)

Reported version: trunk
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/4230