SCM_CLASS_SYSTEM_ERROR  399 src/error.c            SCM_SYSTEM_ERROR(syserror_allocate(SCM_CLASS_SYSTEM_ERROR, SCM_NIL));
SCM_CLASS_SYSTEM_ERROR  911 src/error.c        Scm_InitStaticClassWithMeta(SCM_CLASS_SYSTEM_ERROR,
SCM_CLASS_SYSTEM_ERROR  127 src/gauche/exception.h #define SCM_SYSTEM_ERROR_P(obj)    SCM_ISA(obj, SCM_CLASS_SYSTEM_ERROR)