diff --git a/contrib/10.callcc/callcc.c b/contrib/10.callcc/callcc.c
index 36ac9ed5..b3f7d6e4 100644
--- a/contrib/10.callcc/callcc.c
+++ b/contrib/10.callcc/callcc.c
@@ -258,10 +258,13 @@ pic_callcc_full(pic_state *pic, struct pic_proc *proc)
 }
 
 static pic_value
-pic_callcc_full_trampoline(pic_state *pic, struct pic_proc *proc)
+pic_callcc_callcc(pic_state *pic)
 {
+  struct pic_proc *proc;
   struct pic_fullcont *cont;
 
+  pic_get_args(pic, "l", &proc);
+
   save_cont(pic, &cont);
   if (setjmp(cont->jmp)) {
     return pic_values_by_list(pic, cont->results);
@@ -277,20 +280,10 @@ pic_callcc_full_trampoline(pic_state *pic, struct pic_proc *proc)
     /* save the continuation object in proc */
     pic_proc_env_set(pic, c, "cont", pic_obj_value(dat));
 
-    return pic_apply_trampoline(pic, proc, pic_list1(pic, pic_obj_value(c)));
+    return pic_apply_trampoline_list(pic, proc, pic_list1(pic, pic_obj_value(c)));
   }
 }
 
-static pic_value
-pic_callcc_callcc(pic_state *pic)
-{
-  struct pic_proc *cb;
-
-  pic_get_args(pic, "l", &cb);
-
-  return pic_callcc_full_trampoline(pic, cb);
-}
-
 #define pic_redefun(pic, lib, name, func)       \
   pic_set(pic, lib, name, pic_obj_value(pic_make_proc(pic, func)))
 
diff --git a/extlib/benz/cont.c b/extlib/benz/cont.c
index b5b25b4f..46b5908c 100644
--- a/extlib/benz/cont.c
+++ b/extlib/benz/cont.c
@@ -289,16 +289,19 @@ static pic_value
 pic_cont_call_with_values(pic_state *pic)
 {
   struct pic_proc *producer, *consumer;
-  size_t argc;
-  pic_value args[256];
 
   pic_get_args(pic, "ll", &producer, &consumer);
 
   pic_apply(pic, producer, pic_nil_value());
 
-  argc = pic_receive(pic, 256, args);
+  do {
+    size_t argc = pic_receive(pic, 0, NULL);
+    pic_value args[argc];
 
-  return pic_apply_trampoline(pic, consumer, pic_list_by_array(pic, argc, args));
+    pic_receive(pic, argc, args);
+
+    return pic_apply_trampoline(pic, consumer, argc, args);
+  } while (0);
 }
 
 void
diff --git a/extlib/benz/include/picrin.h b/extlib/benz/include/picrin.h
index ab1a7f98..700d1a28 100644
--- a/extlib/benz/include/picrin.h
+++ b/extlib/benz/include/picrin.h
@@ -201,7 +201,8 @@ pic_value pic_apply2(pic_state *, struct pic_proc *, pic_value, pic_value);
 pic_value pic_apply3(pic_state *, struct pic_proc *, pic_value, pic_value, pic_value);
 pic_value pic_apply4(pic_state *, struct pic_proc *, pic_value, pic_value, pic_value, pic_value);
 pic_value pic_apply5(pic_state *, struct pic_proc *, pic_value, pic_value, pic_value, pic_value, pic_value);
-pic_value pic_apply_trampoline(pic_state *, struct pic_proc *, pic_value);
+pic_value pic_apply_trampoline(pic_state *, struct pic_proc *, size_t, pic_value *);
+pic_value pic_apply_trampoline_list(pic_state *, struct pic_proc *, pic_value);
 pic_value pic_eval(pic_state *, pic_value, struct pic_env *);
 struct pic_proc *pic_compile(pic_state *, pic_value, struct pic_env *);
 
diff --git a/extlib/benz/proc.c b/extlib/benz/proc.c
index ea8d71d1..4c00885b 100644
--- a/extlib/benz/proc.c
+++ b/extlib/benz/proc.c
@@ -86,7 +86,7 @@ pic_proc_apply(pic_state *pic)
     arg_list = pic_cons(pic, args[argc], arg_list);
   }
 
-  return pic_apply_trampoline(pic, proc, arg_list);
+  return pic_apply_trampoline_list(pic, proc, arg_list);
 }
 
 void
diff --git a/extlib/benz/vm.c b/extlib/benz/vm.c
index 89dbe518..abf6f014 100644
--- a/extlib/benz/vm.c
+++ b/extlib/benz/vm.c
@@ -957,10 +957,11 @@ pic_apply(pic_state *pic, struct pic_proc *proc, pic_value args)
 }
 
 pic_value
-pic_apply_trampoline(pic_state *pic, struct pic_proc *proc, pic_value args)
+pic_apply_trampoline(pic_state *pic, struct pic_proc *proc, size_t argc, pic_value *args)
 {
-  pic_value v, it, *sp;
+  pic_value *sp;
   pic_callinfo *ci;
+  size_t i;
 
   PIC_INIT_CODE_I(pic->iseq[0], OP_NOP, 0);
   PIC_INIT_CODE_I(pic->iseq[1], OP_TAILCALL, -1);
@@ -968,22 +969,36 @@ pic_apply_trampoline(pic_state *pic, struct pic_proc *proc, pic_value args)
   *pic->sp++ = pic_obj_value(proc);
 
   sp = pic->sp;
-  pic_for_each (v, args, it) {
-    *sp++ = v;
+  for (i = 0; i < argc; ++i) {
+    *sp++ = args[i];
   }
 
   ci = PUSHCI();
   ci->ip = pic->iseq;
   ci->fp = pic->sp;
-  ci->retc = (int)pic_length(pic, args);
+  ci->retc = (int)argc;
 
   if (ci->retc == 0) {
     return pic_undef_value();
   } else {
-    return pic_car(pic, args);
+    return args[0];
   }
 }
 
+pic_value
+pic_apply_trampoline_list(pic_state *pic, struct pic_proc *proc, pic_value args)
+{
+  size_t i, argc = pic_length(pic, args);
+  pic_value val, it, argv[argc];
+
+  i = 0;
+  pic_for_each (val, args, it) {
+    argv[i++] = val;
+  }
+
+  return pic_apply_trampoline(pic, proc, argc, argv);
+}
+
 pic_value
 pic_apply0(pic_state *pic, struct pic_proc *proc)
 {