BUG: C1001: Internal Compiler Error: msc3.cpp, Line 429

The information in this article applies to:

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

      - Microsoft Visual C++ for Windows, version 1.5
  

SYMPTOMS

Compiling the sample code shown below with the /G3 option causes the compiler to generate the following error message:

   fatal error C1001: internal compiler error
      (compiler file 'msc3.cpp', line 429)

RESOLUTION

To avoid the C1001 error, do one of the following:

1. Do not compile with the /G3 option.

   -or-

2. Restructure the code to avoid the problem. The sample code below illustrates this technique.

   -or-

3. Try disabling all optimizations around the area that causes

       the error
   

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed above. We are researching this bug and will post new information here in the Microsoft Knowledge Base as it becomes available.

This is not a problem in the 32-bit compilers.

MORE INFORMATION

The following sample code can be used to demonstrate the problem.

Sample Code

/* Compile options needed: /G3
*/

#include <stdlib.h>

#define TRUE     1
#define FALSE     0

void main()

    long double var_1_is_less;
    long double tmp;

    // This statement causes the C1001 error
    var_1_is_less = (__min( var_1 , var_2 ) == var_1);

    // Restructuring the code to something like the following
    // avoids the problem
    /*
    if(__min( var_1 , var_2 ) == var_1)
        var_1_is_less = TRUE;
    else
        var_1_is_less = FALSE;
    */