Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
4	0	EP	call site: 00000	RoundtripResult::unwrap_error

Fuzzer calltree


         fuzz_target

[function] [call site] 00000


           roundtrip::<TestAllTypesProto2>

[function] [call site] 00001


           RoundtripResult::unwrap_error

[function] [call site] 00002

Ok

[function] [call site] 00003

Err

[function] [call site] 00004