Fuzz introspector: fuzz_sparse6
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzzer calltree

0 ...fuzz_sparse6.TestOneInput [function] [call site] 00000
1 <builtin>.len [function] [call site] 00001
1 networkx.from_sparse6_bytes [function] [call site] 00002