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It's 2021, so go module is a must.
When using
io.ReadAll
, the function will continue reading untilio.EOF
error is returned. Before this error was never returned, so such an attempt would hang indefinitely.The
Read
function never actually wrote anything to the input slice. This is because you were re-assigning the slice variable instead of writing to it, which only replaces the local variable reference, it doesn't actually touch the original slice. You should instead use thecopy
function.