FIX: Fatal Error C1001: Compiler File MSC1.CPP Line 1056

The information in this article applies to:

   The Microsoft C/C++ Compiler (CL.EXE), included with
     - Microsoft Visual C++, 32-bit Edition, version 2.0

SYMPTOMS

When compiling the Sample Code below, the compiler gives the following fatal error message:

   test.cpp(14) : fatal error C1001: INTERNAL COMPILER ERROR
                   (compiler file 'msc1.cpp', line 1056)
       Please choose the Technical Support command on the Visual C++
       Help menu, or open the Technical Support help file for more
       information

RESOLUTION

See the workaround embedded in the Sample Code section of this article.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This problem was fixed in Microsoft Visual C++, 32-bit Edition, version 4.0.

MORE INFORMATION

The sample code below can be used to reproduce the compiler error.

Sample Code to Reproduce Problem

/* Compile options needed: none
*/

#include <iostream.h>

   return o;

class ray {

   public:
                genvec3d<float> origin;
                ray(){}

                friend int operator<<(ostream& o, ray& r)
/* The following line causes compiler Error */
                { o << origin; return 1; }

/* To work around the problem, change the line above into a comment and
   change the following line to an executed line of code.  */
            /*  { o << r.origin; return 1; }  */
};