1. while processing REPL source: class Animal {} [0mLLVMSymbolizer: error reading file: No such file or directory. LLVMSymbolizer: error reading file: No such file or directory. LLVMSymbolizer: error reading file: No such file or directory. #0 0x000000000459a4b4 (swift+0x459a4b4) #1 0x0000000004598280 (swift+0x4598280) #2 0x000000000459a662 (swift+0x459a662) #3 0x00007f494a31e390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007f494a74e000