For unit testing, probably writing a little program to access the cmaps would be the easiest way. Or using some other font debugging tool. Then it could be reproduced on every platform. But I wouldn't expect this problem to reoccur, unless the tools being used are truly broken.
For unit testing, probably writing a little program to access the cmaps would be the easiest way. Or using some other font debugging tool. Then it could be reproduced on every platform. But I wouldn't expect this problem to reoccur, unless the tools being used are truly broken.