tree 2ae208654659bbf5803637f65223b2b79e26ae3b
parent 29677a9c119abeb49579e132b0482ced314018e9
author Damien Neil <dneil@google.com> 1584488965 -0700
committer Damien Neil <dneil@google.com> 1584509254 +0000

internal/encoding/messageset: don't modify input data when unmarshaling

When combining multiple message fields in a MessageSet item (a case
which should never happen in practice), unmarshal could modify the input
data. Fix it to not do so. Add a general check to ensure that unmarshal
operations don't modify the input.

Change-Id: Idde46e6132a1dc96c374f9146efff81783c3bef3
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/223818
Reviewed-by: Joe Tsai <joetsai@google.com>