1[!fuzz] skip
2[short] skip
3env GOCACHE=$WORK/cache
4
5# FuzzA attempts to cause the mutator to create duplicate inputs that generate
6# new coverage. Previously this would trigger a corner case when the fuzzer
7# had an execution limit, causing it to deadlock and sit in the coordinator
8# loop indefinitely, failing to exit once the limit had been exhausted.
9
10go test -fuzz=FuzzA -fuzztime=100x -parallel=1
11
12-- go.mod --
13module m
14
15go 1.16
16-- fuzz_test.go --
17package fuzz_test
18
19import (
20 "fmt"
21 "testing"
22)
23
24func FuzzA(f *testing.F) {
25 f.Add([]byte("seed"))
26 i := 0
27 f.Fuzz(func(t *testing.T, b []byte) {
28 i++
29 if string(b) == "seed" {
30 if i == 0 {
31 fmt.Println("a")
32 } else if i > 1 {
33 fmt.Println("b")
34 }
35 }
36 })
37}
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