Exception type for packman library, using magic constants #include'd from a C header file shared with the foreign primitive operation code.

PackExceptions can occur at Haskell level or in the foreign primop.

All Haskell-level exceptions are cases of invalid data when reading and deserialising Serialised data:

• P_BinaryMismatch: serialised data were produced by a different executable (must be the same binary).
• P_TypeMismatch: serialised data have the wrong type
• P_ParseError: serialised data could not be parsed (from binary or text format)

The exceptions caused by the foreign primops (return codes) indicate errors at the C level. Most of them can occur when serialising data; the exception is P_GARBLED which indicates that serialised data is garbled.