diff --git a/main.cpp b/main.cpp
index f1e63e4f..7cf8522f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -22,7 +22,7 @@ void help()
 #endif
     <<"nasal <option>\n"
     <<"option:\n"
-    <<"    -h, --help      | get this help.\n"
+    <<"    -h, --help      | get this help and exit.\n"
     <<"    -v, --version   | get version of nasal interpreter.\n\n"
     <<"nasal [option...] <file> [argv...]\n"
     <<"option:\n"
@@ -161,8 +161,6 @@ i32 main(i32 argc,const char* argv[])
     }
     if(!filename.length())
         err();
-    if(!cmd)
-        cmd|=VM_EXEC;
-    execute(filename,vm_argv,cmd);
+    execute(filename,vm_argv,cmd?cmd:cmd|VM_EXEC);
     return 0;
 }
\ No newline at end of file
diff --git a/nasal_builtin.h b/nasal_builtin.h
index f547f263..4d6fb3e5 100644
--- a/nasal_builtin.h
+++ b/nasal_builtin.h
@@ -12,20 +12,20 @@ nas_ref nas_err(const string& err_f,const string& info)
     return {vm_none};
 }
 
-inline void print_core(std::vector<nas_ref>& elems)
+void print_core(std::vector<nas_ref>& elems)
 {
     for(auto& i:elems)
         switch(i.type)
         {
-            case vm_none: std::cout<<"null";        break;
-            case vm_nil:  std::cout<<"nil";         break;
-            case vm_num:  std::cout<<i.num();       break;
-            case vm_str:  std::cout<<i.str();       break;
-            case vm_vec:  i.vec().print();          break;
-            case vm_hash: i.hash().print();         break;
-            case vm_func: std::cout<<"func(..){..}";break;
-            case vm_obj:  std::cout<<"<object>";    break;
-            case vm_co:   std::cout<<"<coroutine>"; break;
+            case vm_none:std::cout<<"null";        break;
+            case vm_nil: std::cout<<"nil";         break;
+            case vm_num: std::cout<<i.num();       break;
+            case vm_str: std::cout<<i.str();       break;
+            case vm_vec: i.vec().print();          break;
+            case vm_hash:i.hash().print();         break;
+            case vm_func:std::cout<<"func(..){..}";break;
+            case vm_obj: std::cout<<"<object>";    break;
+            case vm_co:  std::cout<<"<coroutine>"; break;
         }
 }
 nas_ref builtin_print(nas_ref* local,nasal_gc& gc)