Bug report

Required Info:

• Operating System:
  • Ubuntu 22.04
• Installation type:
  • binaries
• Version or commit hash:
  • 16.0.7-1jammy.20231205.162058
• DDS implementation:
  • CycloneDDS
• Client library (if applicable):
  • rclcpp

Steps to reproduce issue

1. Create a shared library with no nodes in it and compile
2. Create a rclcpp::Node class and register it as a component. Put it in a new version of the shared library.
3. In the install workspace, replace the new shared library with the old .so
4. Run the generated rclcpp_components main executable.

Expected behavior

Node to throw exception and crash.

Actual behavior

Executor starts running but with no node inside, and just hangs on waiting for work forever.

Additional information

Theoretically this state shouldn't happen, but it did for me because of cached .so binaries that didn't have the class inside. This should be a fairly simple fix: just crash if no matching classes were found.