Runtime errors on macOS with protobuf 21.2

[scpeters]

Protobuf version 21.2 was recently merged in homebrew-core, and since that time there have been run-time errors in all gazebo tests that link against protobuf with lazy symbol binding errors like the following:

1: [ RUN      ] MsgsTest.Msg
1: dyld: lazy symbol binding failed: Symbol not found: __ZN6google8protobuf8internal16InternalMetadataD1Ev
1:   Referenced from: /Users/jenkins/workspace/gazebo-ci-pr_any-homebrew-amd64/build/gazebo/msgs/libgazebo_msgs.9.dylib
1:   Expected in: flat namespace
1: 
1: dyld: Symbol not found: __ZN6google8protobuf8internal16InternalMetadataD1Ev
1:   Referenced from: /Users/jenkins/workspace/gazebo-ci-pr_any-homebrew-amd64/build/gazebo/msgs/libgazebo_msgs.9.dylib
1:   Expected in: flat namespace
1: 
  1/662 Test   #1: UNIT_msgs_TEST ........................................Subprocess aborted***Exception:   0.33 sec

With c++filt the symbol __ZN6google8protobuf8internal16InternalMetadataD1Ev is translated to google::protobuf::internal::InternalMetadata::~InternalMetadata(). It turns out there is an ABI with that symbol reported in protocolbuffers/protobuf#9947 that has been fixed in the next version of protobuf (21.3). This should be fixed once the next version of protobuf is merged to homebrew-core from Homebrew/homebrew-core#106252.

[carlocab]

You can also pass -DNEDEBUG to your builds so you don't need to wait for the new version. We've applied this fix to a number of protobuf dependents in Homebrew/core.

[scpeters]

thanks @carlocab! it looks like you've already merged 21.3 with the fix, and now my bottles are working again!