testing/lua-stacktraceplus: new aport
https://github.com/ignacio/StackTracePlus Enhanced stack traces for Lua 5.1, 5.2, 5.3, LuaJIT, and OpenResty
This is a great little library which I am currently using in production. It uses Lua's built-in 'debug' library to annotate stack traces with the values of local variables at each level of the stack.
Worth its weight in gold when debugging uncaught errors.