testing: -fuzzminimizetime={number}x doesn't work

[katiehockman]

While testing locally, I noticed that -fuzzminimizetime doesn't work when running with something like 10x.

Even when -fuzzminimizetime is set to 10x, it runs many more times than that.

godev test -run Fuzz -fuzz Fuzz -fuzzminimizetime=10x
fuzz: elapsed: 0s, gathering baseline coverage: 0/25 completed
fuzz: elapsed: 0s, gathering baseline coverage: 25/25 completed, now fuzzing with 8 workers
fuzz: minimizing 1474-byte crash input...
fuzz: elapsed: 0s, minimizing
--- FAIL: FuzzFuzzer (0.15s)
        --- FAIL: FuzzFuzzer (0.00s)
            dsa_test.go:19: minimize this! 0, len(s)=478
        --- FAIL: FuzzFuzzer (0.00s)
            dsa_test.go:19: minimize this! 0, len(s)=478
.... this goes on for a while
        --- FAIL: FuzzFuzzer (0.00s)
            dsa_test.go:19: minimize this! 0, len(s)=4
        --- FAIL: FuzzFuzzer (0.00s)
            dsa_test.go:19: minimize this! 0, len(s)=3
        --- FAIL: FuzzFuzzer (0.00s)
            dsa_test.go:19: minimize this! 0, len(s)=2
        --- FAIL: FuzzFuzzer (0.00s)
            dsa_test.go:19: minimize this! 0, len(s)=1
    
    Crash written to testdata/fuzz/FuzzFuzzer/d8398164056fc45958535f08a1b29a7fd10a21f12c95b34d4b891c6f9842b6d3
    To re-run:
    go test foo -run=FuzzFuzzer/d8398164056fc45958535f08a1b29a7fd10a21f12c95b34d4b891c6f9842b6d3
FAIL
exit status 1
FAIL    foo      0.317s

/cc @golang/fuzzing

[gopherbot]

Change https://golang.org/cl/355450 mentions this issue: internal/fuzz: fix -fuzzminimizetime with 'x' bug