drop-in type check for rb_define_private_method

We can check the function pointer passed to rb_define_private_method
like how we do so in rb_define_method.  Doing so revealed some
problematic usages of rb_obj_dummy.  They had to be split according
to their arity.

1 files changed, 3 insertions, 0 deletions

diff --git a/class.c b/class.c
index 809bfd8c9d..0714f54e16 100644
--- a/class.c
+++ b/class.c
@@ -1561,6 +1561,9 @@ rb_define_protected_method(VALUE klass, const char *name, VALUE (*func)(ANYARGS)
     rb_add_method_cfunc(klass, rb_intern(name), func, argc, METHOD_VISI_PROTECTED);
 }
 
+#ifdef rb_define_private_method
+#undef rb_define_private_method
+#endif
 void
 rb_define_private_method(VALUE klass, const char *name, VALUE (*func)(ANYARGS), int argc)
 {