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When unit test fails, core file is created. Kyua's 'debug' command can run GDB on it and provide backtrace. Unfortunately Kyua is picky about location of these core files we opt to use custom Kyua fork and copy core files from Kyua working directory to source tree and make it available in GitLab.
Unit tests for BIND 9 are based on the CMocka testing framework and the Kyua test execution engine. If your distribution of choice doesn't include packages for kyua or cmocka, the sources can be found here: * Kyua 0.13 - https://github.com/jmmv/kyua/releases * CMocka 1.0 - https://cmocka.org/files/