Merge branch 'bug/135' into next

* bug/135:
  Summary: fix, initialise cat morphism array properly, harden the tests Keywords: fix bug 135
  fix, change order of bitset in lrecord struct, hash_cache last
  cosmetics, turn morphism extern_inlines into static inlines
  test, run test suite with MALLOC_PERTURB_ set to be extra-harsh to the code
  test, introduce regression test for one MALLOC_PERTURB_ triggered crash