spring/spring — comment on commit 61351eff4aee05b8f04f91cb601a54093f6f9dc5
File:  line 0
By zerver:

A side question, there is some code that allows the builder to leave build stance and still keep the nanoframe alive indefinitely. Do we really need that? I believe this behavior was meant to prevent a timeout between the nanoframe spawn and reaching build stance. In the past the nanoframe was spawned immediately, regardless of build stance, while now the nanoframe is spawned only after buildstance is reached.

I consider this 'keep nanoframe alive' behavior to be the root of all problems.