Certain termination reports do contain small memory dumps and/or register values, so theoretically could could contain decodable PII. This is something the OS vendor provides, not the developer of the app or the crash reporter.
Pseudonymous information always has a high risk of being abused for fingerprinting and thus denonymising. I feel that there needs to be a trade-off though: on public datasets, people should be very careful with pseudonymous identifiers. On things like crash diagnostics that are never meant to be shared I feel they're perfectly fine. That's why I dislike a general discussion where all PII is bad and evil without context.