Put some info into the error message saying which argument and the value of the argument where we're having the problem.
Put some info into the error message saying which argument and the value
of the argument where we're having the problem.

h0nza/yajl-tcl,flightaware/yajl-tcl,flightaware/yajl-tcl,h0nza/yajl-tcl,flightaware/yajl-tcl