Do a basic scan of Erlang source code and report any function calls that may cause Erlang source code to be insecure. Erlang/OTP version 19.0 and higher is required. If beam files are used, they must have been compiled with the debug_info option to provide the abstract_code used by pest.erl. However, pest.erl also consumes Erlang source code, including Erlang source escript files. If beam files are available, it is best to use the beam files with pest.erl due to how the Erlang compiler preprocessor and optimizations can influence function calls.