I've come across a weird bug while writing a web source script for Google Play Music, which can be downloaded here for testing purposes.
The thing is that I use camel case for keywords as shown in Mp3tag help documentation. Well, this causes an abrupt exit without error (
output["Error"]= "<OK>") in the very same line where a loop is used. Specifically, these loops cause an error:
but not if they are rewritten as follows:
PS: The same behavior is observed both in Mp3tag v2.90a as in v2.90e.