tree 4be631c2543c4b6ef5aeaf1c86ba262b62e70bde
parent 592e52e14841c9571a83be0364a7029365c42c9d
author Joe Tsai <joetsai@digital-static.net> 1567745196 -0700
committer Joe Tsai <joetsai@digital-static.net> 1567753995 +0000

encoding: verify that the target message is extendable

After resolving a FieldDescriptor from the resolver, verify that the
returned descriptor truly does extend the target message.

This will never happen with the global registry, since it checks this
but can happen with poorly written custom resolvers.

Change-Id: I2de5b9d2fb9d32e076ec4e82adda98d672891444
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/193737
Reviewed-by: Herbie Ong <herbie@google.com>