tree 4cb36459b793dfc8a4df2f6e33b6518bb4b8e5ef
parent 3c5f52aab481c053af6597221c2261a82b9f3baf
author Thomas Van Lenten <thomasvl@google.com> 1542219903 -0500
committer Thomas Van Lenten <thomasvl@google.com> 1542221824 -0500

In debug builds output a warning about NSCoding and extensions.

Using NSCoding with a Message that has extensions is risky because
when reloaded, there is no way to provide a registry through the
NSCoding plumbing, so output a warnings to atleast give developers
a hint about the potential issues.