exec.CombinedOutput uses the same io.Writer for both stdout and stderr in exec.go - Go (opensource.google) <https://cs.opensource.google/go/go/+/refs/tags/go1.21.1:src/os/exec/exec.go;l=1003> . This io.Writer is written in exec.go - Go (opensource.google) <https://cs.opensource.google/go/go/+/refs/tags/go1.21.1:src/os/exec/exec.go;l=717> . These two writes happens concurrently in two goroutines in exec.go - Go (opensource.google) <https://cs.opensource.google/go/go/+/refs/tags/go1.21.1:src/os/exec/exec.go;l=717> . As far as I know, bytes.Buffer is not safe to concurrent writes. Is this not a race?
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