Disallow runtime shutdown when the Python error indicator is set

[lostmsu]

What does this implement/fix? Explain your changes.

Shutting down runtime when the Python error indicator is set has unpredictable behavior.

Checklist

• Updated the CHANGELOG

[filmor]

Couldn't we just clear it instead?

[lostmsu]

@filmor that would be silent information loss.

[filmor]

This way will probably lead to a lot more unwanted behaviour in that a program that ends with Shutdown will not have its resources closed if an error is still set (as it will just crash on this exception), or am I misunderstanding something?

[lostmsu]

@filmor if they are at this point, they already have an unhandled exception. Generally speaking it is better to crash, than to try to close resources as you might persist a corrupted state and not get notified about it at all.

[filmor]

Hmm, I'll tentatively agree with this, let's see whether someone complains :)