Default severity: error
The io.Writer contract requires Write implementations not to modify the
provided byte slice, even temporarily. Mutating an element or appending into
the input can corrupt caller-owned data.
Bad
func (w *writer) Write(p []byte) (int, error) { p[0] = 0; return len(p), nil }Good
func (w *writer) Write(p []byte) (int, error) { return w.dst.Write(p) }