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re: your gdb trace: you'll need to (re)build your workspace with CMAKE_BUILD_TYPE set to Debug

I was able to catch a segfault in <...process my stuff...> which seems to cause a segfault in a broadcaster object.

I am still curious about my error though: if I build my package in Release mode, the segfault caused by my algorithm wouldn't crash my node without asking a broadcaster to broadcast my result. It would only crash when I ask a broadcaster to broadcast the result.

But this is a different question. Thank you for your help @gvdhoorn. Please close this question.

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