Ticket #723: patch.diff

vm.h

@@ -556 +556 @@
         } rcall;
         struct {
             IMP imp;
+            int argc;
             bs_element_method_t *bs_method;     
             rb_vm_objc_stub_t *stub;
         } ocall;

dispatcher.cpp

@@ -501 +501 @@
     cache->sel = sel;
     cache->klass = klass;
     cache->as.ocall.imp = imp;
+    cache->as.ocall.argc = argc;
     cache->as.ocall.bs_method = GET_CORE()->find_bs_method(klass, sel);
 
     char types[200];
@@ -829 +830 @@
         return v;
     }
     else if (cache->flag & MCACHE_OCALL) {
+        if (cache->as.ocall.argc != argc) {
+            goto recache;
+        }
         if (!cache_method) {
             cache->flag = 0;
         }