failing ros1_bridge tests

[dirk-thomas]

See https://ci.ros2.org/view/packaging/job/packaging_linux/1675/testReport/ which is trying to run a ROS 1 talker, the ros1_bridge dynamic_bridge, and ROS 2 listener.

The problem for the failure seems pretty similar to ros2/rmw_fastrtps#265. The logging messages are published as a C message containing a string. The actual message exchanged between the talker and listener is a C++ message (based on the same .msg). I assume the first advertised topic will "lock in" the C message type and then falsely try to use the same typesupport to read the C++ message which fails with realloc(): invalid pointer.

[eboasson]

I assume the first advertised topic will "lock in" the C message type and then falsely try to use the same typesupport to read the C++ message which fails with realloc(): invalid pointer.

The type support is indeed cached in the topic. This is something that needs to be changed in Cyclone for mixed-language use and not very difficult (and I'm all in favour of it).

[dirk-thomas]

Resolved by #96.

Linux packaging build: (one unrelated CMake warning).