[Twisted-Python] Strange recursion error with twisted.web

[Peter Westlake]

On Tue, 9 Mar 2021, at 19:28, Glyph wrote:
> 
> 
> > On Mar 9, 2021, at 4:54 AM, Peter Westlake <peter.westlake at pobox.com> wrote:
> > 
> > I'm getting a "maximum recursion depth exceeded" error that appears to be coming from flatten(). The odd thing is that it only happens sometimes.
> 
> flatten() can definitely result in some deep recursive stacks, 
> particularly in combination with synchronous Deferreds which have their 
> own accumulating stack costs. I'd be interested to see a minimal 
> reproducer for this though, I'm sure we could do a lot better.

It’s good to know that this isn’t completely unexpected. I’ll try to reproduce it, thanks.

Peter.