libctf: don't lose track of all valid types upon serialization
One pattern which is rarely done in libctf but which is meant to work is this: ctf_create(); ctf_add_*(); // add stuff ctf_type_*() // look stuff up ctf_write_*(); ctf_add_*(); // should still work ctf_type_*() // so should this ctf_write_*(); // and this i.e., writing out a dict should not break it and you should be able to do everything you could do with it before, including writing it out again. Unfortunately this has been broken for a while because the field which indicates the maximum valid type ID was not preserved across serialization: so type additions after serialization would overwrite types (obviously disastrous) and type lookups would just fail. Fix trivial. libctf/ChangeLog 2021-03-18 Nick Alcock <nick.alcock@oracle.com> * ctf-serialize.c (ctf_serialize): Preserve ctf_typemax across serialization.
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