found redundant code in file natSystemProperties.cc

["Martin Ettl" <ettl.martin@gmx.de>]

Hello friends,

i have checked the sources of gcc-4.4.1 with the static code analysis tool cppcheck. It brought up an issue in file gcc-4.4.1/libjava/gnu/classpath/natSystemProperties.cc at line 278. Lets take a look at the sourcecode:


// ...

  while (buffer != NULL)
    {
      if (getcwd (buffer, buflen) != NULL)
	{
	  SET ("user.dir", buffer);
	  break;
	}
      if (errno != ERANGE)
	break;
      buflen = 2 * buflen;
      char *orig_buf = buffer;
      buffer = (char *) realloc (buffer, buflen);
      if (buffer == NULL)
	free (orig_buf);
    }
278 if (buffer != NULL)
    free (buffer);
....

Here the line 278 is redundant, because it is safe to deallocate a NULL-Pointer! In other words, the if-statement can be removed.

Best regards

Ettl Martin


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