Before this change, when encountering an io.EOF after reading at least
one byte, the zero value byte was — incorrectly — appended to sizeBuf,
and the io.EOF was ignored, resulting in a complete varint (0 has no
continuation bit), which in turn resulted in incorrect unmarshalling.
Change-Id: If06d45039d998eaddf91d0864814bb31d4cb7ae0
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/505555
Reviewed-by: Lasse Folger <lassefolger@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
When unmarshalling many messages, this reduces the amount of memory allocated and saves CPU time.
Change-Id: I440b8b223319ba2ed31ce559c125b1d640d5880c
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/491596
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Lasse Folger <lassefolger@google.com>
Reviewed-by: Damien Neil <dneil@google.com>