diff -r a03f245243b0 -r e33bcb9d5e9c hedgewars/uIO.pas
--- a/hedgewars/uIO.pas	Sun Dec 24 16:56:22 2017 +0100
+++ b/hedgewars/uIO.pas	Mon Dec 25 00:58:47 2017 +0100
@@ -123,6 +123,7 @@
     isProcessed: boolean;
 begin
 isProcessed := true;
+system.writeln('IPC:', s);
 
 case s[1] of
      '!': begin AddFileLog('Ping? Pong!'); isPonged:= true; end;