Graphviz.app crashes on invalid input
Steps to reproduce
Open this graph in Graphviz.app:
digraph G {N [label=<<invalid>>]}
Expected Behaviour
Error from Graphviz.app or empty rendering window
Actual Behaviour
Graphviz.app quits
OS Version
macOS 12.7.2
Graphviz Version
dot - graphviz version 9.0.0 (20230911.1827)
Additional info
The command line dot
program properly issues an error:
% echo 'digraph G {N [label=<<invalid>>]}' | dot
Error: Unknown HTML element <invalid> on line 1