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

Fuzzer calltree

0 ...fuzz_all.TestOneInput [function] [call site] 00000
1 ijson.get_backend [function] [call site] 00001
2 importlib.import_module [function] [call site] 00002
1 io.BytesIO [function] [call site] 00003
1 backend.parse [function] [call site] 00004