Kernel killed after calling graphviz_layout 512 times

[tsmith-228]

I think this may be related to #213?

Running the following code causes windows to kill the python kernel. The workaround from the issue above works but there seems to be an underlying problem (I think in _run_prog in agraph.py?)

import networkx as nx

for _ in range(512):
    G = nx.DiGraph()
    pos = nx.nx_agraph.graphviz_layout(G)

---

Workaround

# pywin32 package
import win32file as wfile

# Set to something above wfile._getmaxstdio(), according to your needs
wfile._setmaxstdio(513)

---

Windows 10
Python 3.11.5
networkx 3.1
pygraphviz 1.11

[DanielGiel]

Hey there,

I got the same Issue on Windows 11, with Python 3.9.13.
I guess the file handles are not getting closed, since there are always exactly 510 calls that finish sucessfully.