compress/flate: return error on closed stream write
Previously flate.Writer allowed writes after Close, and this behavior
could lead to stream corruption.
Fixes #27741
Change-Id: Iee1ac69f8199232f693dba77b275f7078257b582
Reviewed-on: https://go-review.googlesource.com/c/go/+/136475
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Joseph Tsai <joetsai@digital-static.net> Reviewed-by: Carlos Amedee <carlos@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>