But this time with a twist: [~]> lldb lldb: symbol lookup error: /opt/clang/lib64/liblldbInterpreter.so: undefined symbol: PyExc_KeyboardInterrupt [~]> ldd -r /opt/clang/lib64/liblldb* | grep undefined | wc -l 9875 This is on Linux x86-64, seems like its underlinking somehow. Regards.