What version of Go are you using (go version)?

go version go1.14.13 linux/amd64

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOOS="linux"

What did you do?

general memory profile with the code in the Function main

memf, err := os.OpenFile("mem_profile2", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
defer memf.Close()
if err != nil {
log.Fatal("could not create memory profile: ", err)
}
err = pprof.Lookup("heap").WriteTo(memf, 1)

error:
go tool pprof mem_profile2
mem_profile2: parsing profile: unexpected number of sample values: got 0, want 6