Puzzle 2

A really difficult one this time!
The code defines a Logger class and a macro that gets the static instance of the logger and passes the text to its Log method with the log level TRACE_LEVEL.

Unfortunately the code does not compile due to a syntax error.
You can copy the code and try it with your favorite C or C++ compiler.
I get an error that l is not defined, and interestingly there is an 'else
without an if' !

#include <stdio.h>


// define a class for logging
// provides static instance via Instance method
class Logger
{
private:
 static Logger* sInstance;


public:
 Logger() {};
 ~Logger() {};


 static Logger* Instance()
 {
  if (!sInstance)
   sInstance = new Logger();
  return sInstance;
 }




 void Log(int level, const char* text)
 {
  printf(text);
 }
};


#define TRACE_LEVEL 5


#define TRACE(text)  Logger* l = Logger::Instance();  l->Log(TRACE_LEVEL, text);




Logger* Logger::sInstance = 0; //static initialisation




int main(int argc, char* argv[])
{
 if (argc == 1)
  TRACE("to few parameters");
 

 else
  TRACE("at least one parameter");
 



 //do something sensible
 return 0;
}

A little hint: there's nothing wrong with the Logger class or the macros, the bug is within the main function!

Happy puzzling!