Alright, I got it working! In a very silly way, but nonetheless, working. Details for those curious.

It turns out that, as you said, the signals are still sent to the train while it's waiting for space. So my setup would have worked fine— except that, if the train is waiting not because of ...

How do your schedules and interrupts look like? From what I can tell, as long as the train hasn't moved and is still picking its destination (zzz icon), the stations signals are still available.
Wait, really? Oh, that does open up some options, then.

I think I see what you're getting at. I'll ...

Personally I tend to find that a main bus is kind of required early game, but once you have trains you can use them to make more modular factories. (E.g. have an area just for making circuits, ship copper and iron in and circuits out.) I usually do entirely separate walled areas.

... I haven't ...

This is a complicated one, but the gist of it is that I have stations I want my trains to go to as a backup if their first station choice is unavailable—but only if they're leaving a station that has a particular signal.

I thought this would be simple using the "Destination full" interrupt ...

That's a well-designed system, but it doesn't nearly cover my use case. I want to use robot requests to distribute robots throughout my network, and I want to have a number of robots in the system to make sure those requests stay fulfilled, without adding an excessive amount. Only having requests in ...

TL;DR
Give roboports a circuit setting that reads the total number of robots requested by all roboports in the logistic network.

What?
With Factorio 2.0, roboports now have the ability to request a number of robots to remain "on standby" in the roboport. I want a way to get these requests into ...

While you can use the “Read Logistic Requests” mode of a Robotport to estimate how many Logistic Bots are needed; there is no equivalent for the Construction Requests. I usually just use some multiple of the Number of Roboports to determine the Bot auto-deploy limits.


Ah this is why i'm not ...

Hi, I'm trying to use robot requests to control the amount of robots in my network. I want to insert robots if the number of requested robots is more than the total number of robots in the network (or possibly some other, related ratio). However, it doesn't seem that I can send the robot requests to ...

No; all I've figured out is that it happens sometimes after dying.

I did try placing, replacing contents of, and creating new blueprint before suiciding to see if those reliably make it crash. None did. It only seems to happen if I've been playing for a while.

I can confirm though, that it's after ...

1. Died (to a horde of large biters while attempting to clear a base, if it matters)
2. Before I respawned (possibly when the respawn button appeared or when i clicked it, but possibly before, I can't remember) the game crashed. The error/stacktrace indicates that it was due to a consistency check ...

...Yeah, so I figured that out and was coming back here to rescind the bug report.

Kind of confusing, though; maybe the tooltip on "Anything" could specifically mention that it inputs the one that passed if you are using each?

What did you do?
Set up a decider combinator to compare "anything" to 0 and pass through that "anything".
What happened?
Solid fuel ran into the negative numbers but was still being passed through.
https://i.ibb.co/fVnzjcgg/factoriodeciderbug.png
What did you expect to happen instead? It ...

... so I realized something since I posted the previous post:

Interrupts have to be added to each train's (or group's) schedule.

So in other words... all interrupts are already filtered by train group!

(I just didn't realize it because I'd only used one train group yet, and because the ...

The condition I really really really want for interrupts is: Train Group . As in, the interrupt will only work for trains that are part of the specified group.

It would solve all sorts of issues, from the basic one of "does this train even have the right cars" (yes, you could have conditions for ...

sounds amazing, can't wait

This looks fantastic!

One corollary feature request though - can we get an option to add landfills/platform tiles on regular force build? (Or even make that default behaviour, if you prefer.) I know for sure I will have times I want to build over a lake or extend a platform, but not replace any ...