After a bunch (15-20) tests the suite from https://github.com/Vimjas/vim-python-pep8-indent stalls.

Adding some puts the last --remote-expr is vim --servername VIMRUNNER0.687345666041246 --remote-expr feedkeys("iclass Foo(\<CR>")

In this case vim --servername VIMRUNNER0.687345666041246 --remote-expr 1 hangs already.

It would be nice if this could be detected and e.g. after a few seconds the server getting restarted.

A good idea might be to send a ping always --remote-expr 1 and have a short timeout for this.

It looks like a bug in Vim after all - I cannot pinpoin it to a single test, and I've not looked at strace too closely, but vim is taking ~60% CPU.