[0.12.19] [Martin] Chain Signal not preventing crash in rare cases

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Julianus
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[0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by Julianus »

Hello Factorio developers,

I believe chain signals are supposed to be rather strict, only permitting pass of a train until the next "normal" signal on the path of the train turns green.
There is a situation though, where a chain signal permits a train to crash into the cars of another train.

I rebuild the situation using only base and test mode and saved the game a second before a train crash.

Save: http://julian-schutsch.de/t21.zip
Log file: http://julian-schutsch.de/factorio-previous.log

System used is: A Linux Mint 17.1 Rebecca using 3.13.0-37-generic kernel on a x86-64 machine.

Thanks a lot for such a great game.

Julian

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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by kinnom »

providing instructions would be easyer
no yes yes no yes no yes yes

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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by Titan21 »

kinnom wrote:providing instructions would be easyer
If it takes more than 5 sentences to describe how to reconstruct the issue he totally did the right thing.
And, if he already says "in rare cases" I think everybody's happy with a minimal-case savegame

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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by Julianus »

It took at least an hour to reproduce this.

Especially getting the timing right, saving just before the crash.

Maybe someone can deduce a simpler example from this one.

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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by HanziQ »

Would you happen to have an earlier save?

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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by gheift »

You could do it yourself. Just replay and save at the designated position. I did it and saved just after the newest train was added.
Attachments
t21_d.zip
(2.97 MiB) Downloaded 288 times

Julianus
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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by Julianus »

Thank you very much gheift,

i tried replay, but somehow it crashed after some (short) time. (Different bug...not to discuss here)

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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by gheift »

Julianus wrote:Thank you very much gheift,

i tried replay, but somehow it crashed after some (short) time. (Different bug...not to discuss here)
I had the same problem, luckily it didn't happen everytime: https://forums.factorio.com/forum/vie ... =7&t=18056

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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by Julianus »

Adding to the original topic: It seems that the normal signal has the same fault in some cases. I replaced the signal in question...and there is still a chance of a train crash.

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Re: [0.12.19] [Martin] Chain Signal not preventing crash in rare cases

Post by HanziQ »

Thanks for the report, this will be fixed in the next version.

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