IDLParserContext(StringData, IDLParserContext *) looks like it passes an extra boost::optional argument, which only happens to be valid because the IDLParserContext * can be coerced to a boolean and therefore used for apiStrict in the constructor that does accept two optionals. We should fix this to forward to the correct constructor, ideally by being consistent about the ordering of arguments in the constructors.

https://github.com/10gen/mongo/blob/e510b35074a82f219028c54da8b8241ae9996b0c/src/mongo/idl/idl_parser.h#L310