[0.17.49]game keep crash when it saving

[veryend]

When I save the game or it autosaving the game crashed again & again. Never happened in previous version.
I upload my log file as attachments.
Thanks.

factorio-current.log

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[kovarex]

Hello, it crashes on consistency check for anything related to trains on saving that I added there on purpose so we notice a problem with this when it is being saved instead of making unloadable saves.

Since I fixed few things related to this crash for the next release (that will be released today), I can assume, that most probably, your issue will be solved in 0.17.50, so please, let me know if it still happens. In that case, I would need the last working save and a way to reproduce it.

[veryend]

it works, thank you very much