diff --git a/SMILEBASIC/VM.d b/SMILEBASIC/VM.d
index 8835b8c..3b614a8 100644
--- a/SMILEBASIC/VM.d
+++ b/SMILEBASIC/VM.d
@@ -885,6 +885,6 @@ class CallBuiltinFunction : Code
             result = vm.stack[vm.stacki - argcount..vm.stacki - argcount + outcount];//雑;
         }
         func.func(vm.petitcomputer, arg, result);
-        vm.stacki -= func.argments.length;
+        vm.stacki -= func.argments.length - outcount;
     }
 }
diff --git a/SMILEBASIC/parser.d b/SMILEBASIC/parser.d
index 47e3673..a27245e 100644
--- a/SMILEBASIC/parser.d
+++ b/SMILEBASIC/parser.d
@@ -1055,7 +1055,7 @@ class Parser
             //3号から厳密になって必ずいる
             if(token.type == TokenType.Colon || token.type == TokenType.NewLine)
             {
-                print.addLine();
+                if(addline) print.addLine();
                 break;
             }
             addline = true;
@@ -1091,12 +1091,14 @@ class Parser
                 if(token.type == TokenType.Semicolon)
                 {
                     addline = false;
+                    token = lex.front();
                     continue;
                 }
                 if(token.type == TokenType.Comma) 
                 {
                     print.addTab();
                     addline = false;
+                    token = lex.front();
                     continue;
                 }
                 token = lex.front();
diff --git a/SMILEBASIC/petitcomputer.d b/SMILEBASIC/petitcomputer.d
index 4b27afe..45ec910 100644
--- a/SMILEBASIC/petitcomputer.d
+++ b/SMILEBASIC/petitcomputer.d
@@ -7,6 +7,7 @@ import std.stdio;
 import std.conv;
 import std.string;
 import std.c.stdio;
+import core.sync.mutex;
 import otya.smilebasic.parser;
 class GraphicPage
 {
@@ -358,6 +359,10 @@ DEF FACT(N)
  RETURN N*FACT(N-1)
 END"*/
 `CLS : CL=0 : Z=0
+WHILE 1
+Z=Z+1
+?Z;
+WEND
 WHILE 1
   INC Z : IF Z>200 THEN Z=0
   FOR I=0 TO 15
@@ -373,7 +378,7 @@ FOR I=0 TO 15
   PRINT "Ё プチコン3ゴウ Ж"
 NEXT
 CL=(CL+1) MOD 16 : VSYNC 1
-WEND`*/
+WEND`
 /*
 `CLS : CL=0
 @LOOP
@@ -387,6 +392,7 @@ GOTO @LOOP`*/
         auto vm = parser.compile();
         bool running = true;
         vm.init(this);
+        consolem = new Mutex();
         core.thread.Thread thread = new core.thread.Thread(&render);
         thread.start();
         auto startTicks = SDL_GetTicks();
@@ -434,8 +440,11 @@ GOTO @LOOP`*/
     int CSRY;
     int CSRZ;
     int consoleForeColor, consoleBackColor;
+    Mutex consolem;
     void renderConsole()
     {
+        consolem.lock();
+        scope(exit) consolem.unlock();
         for(int y = 0; y < consoleHeight; y++)
             for(int x = 0; x < consoleWidth; x++)
             {
@@ -474,6 +483,9 @@ GOTO @LOOP`*/
     }
     void printConsoleString(wstring text)
     {
+        consolem.lock();
+        scope(exit) consolem.unlock();
+        //write(text);
         foreach(wchar c; text)
         {
             if(CSRY >= consoleHeight)
@@ -501,7 +513,7 @@ GOTO @LOOP`*/
                 }
                 console[consoleHeight - 1] = tmp;
                 tmp[] = ConsoleCharacter(0, consoleForeColor, consoleBackColor);
-                assert(console[0] != console[2]);
+                //assert(console[0] != console[2]);
                 CSRY = consoleHeight - 1;
             }
         }