Moriarty opened the ticket and wrote:

Combination bug and feature.
If I try to change a diesal/steam train to electric but the rail isn't electrified (but does need to be), the game will have several issues.

a) The trains of that type will continously try to become electrified (going back to the depot all the time). This does not activate the "warn if train is lost" error as the train is not lost, it keeps going.

b) This highlights another bug - if being upgraded to electric, trains should only be automatically routed to electric depots (if there are any) for the upgrade.

c) Suggestion - When the player clicks "start replacing" advise the player they switching to an electric train, and are they sure?

r14706

Reported version: trunk
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/2468