FIX: C1001: 'e:\b_bld\c2\P2\main.c', line 374 with /Zi Switch

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

Compiling an application that uses a local temporary static union, as does the sample code shown in the More Information section below, may cause the following internal compiler error when built with debug information only:

   TEST.CPP(9) : fatal error C1001: INTERNAL COMPILER ERROR
   (compiler file 'e:\b_bld\c2\P2\main.c', line 374)
   Please choose the Technical Support command on the Visual C++
   Help menu, or open the Technical Support help file for more
   information

RESOLUTION

Use either of these two workarounds:

• Remove the /Zi compiler option.

        -or-
  

• Create an object to represent the local static union:

        static union { int z;} tmp;
  

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 Visual C++, 32-bit Edition, version 4.0.

MORE INFORMATION

Sample Code

/* Compile options needed: /Zi
*/

void local()

   union { int x; };
   union { int y; };
   static union { int z; };