check for nil superclass before dereferencing

16 years ago · d89b28c40c
parent fa488d6cea
commit d89b28c40c
1 changed files with 1 additions and 1 deletions
--- a/init.c
+++ b/init.c
@ -733,11 +733,11 @@ __objc_compute_ivar_offsets (Class class)
  if (class->instance_size <= 0)
    {
      Class super = class_superclass_of_class(class);
+      if (Nil == super) { return; }
      if (super->instance_size <= 0)
        {
          __objc_compute_ivar_offsets(super);
        }
-      if (Nil == super) { return; }
      long ivar_start = super->instance_size;
      class->instance_size = ivar_start - class->instance_size;
      /* For each instance variable, we add the offset if required (it will be zero