range_error      1076 src/gauche.h   SCM_EXTERN ScmChar Scm_StringRef(ScmString *str, int k, int range_error);
range_error      1078 src/gauche.h   SCM_EXTERN int     Scm_StringByteRef(ScmString *str, int k, int range_error);
range_error       464 src/string.c   ScmChar Scm_StringRef(ScmString *str, int pos, int range_error)
range_error       495 src/string.c   int Scm_StringByteRef(ScmString *str, int offset, int range_error)