FIX: C1001: Internal Compiler Error: msc2.cpp, Line 992

The information in this article applies to:

• The Microsoft C/C++ Compiler (CL.EXE), included with:

      - Microsoft Visual C++ for Windows, version 1.0
  

SYMPTOMS

Compiling source code that makes extensive use of pointers based on __self in conjunction with any of the /Ol, /Oe, or /Og compiler switches may cause the optimizing compiler to generate the following error message:

    fatal error C1001: internal compiler error
    (compiler file 'msc2.cpp', line 992)

RESOLUTION

To avoid the problem, do one of the following:

• Upgrade to Visual C++ for Windows, version 1.5. This problem has been fixed with the version 8.0c compiler, supplied with Visual C++ for Windows, version 1.5.

  -or-

• Do not use the /Ol, /Oe, or /Og optimizations. This can be accomplished at the module level by not specifying any of these switches and at the function level in the source code by using #pragma optimize directives to turn off the optimizations. To turn off the optimizations with a #pragma directive, place the following statement before the function containing the code that is causing the error:

         #pragma optimize ("leg", off)
  

  To turn the optimizations back on, place the following statement after the function:

         #pragma optimize ( "", on )
  

  -or-

• Use the fast compiler because the problem only occurs when the optimizing compiler is used. You can use the fast compiler by activating the /f compiler switch.

  -or-

• Use the compiler from within Windows because the problem only occurs when the compiler is invoked from the MS-DOS prompt outside of Windows.

STATUS

Microsoft has confirmed this to be a bug in the products listed above. This problem was corrected in Visual C++ for Windows, version 1.5.