Passing nil string to renderObject:fromString:error: causes EXC_BAD_ACCESS

[coduggan]

Perhaps it should check for nil string, and if so, set the error object passed in and return before trying to parse and crashing.

[groue]

Thanks a lot @CnCool

Version 6.7.5 fixes your issue: an NSError of code GRMustacheErrorDomain and code GRMustacheErrorCodeParseError is returned when the template string is nil.