BUG: Try Blocks Within a Switch Statement Behave Incorrectly

• The C/C++ Compiler (CL.EXE), used with:
  • Microsoft Visual C++, 32-bit Editions, versions 2.0, 4.0, 4.1, 4.2, 5.0, 6.0

SYMPTOMS

A try block within a switch statement may cause the exception to be handled incorrectly, as illustrated by the sample code in the MORE INFORMATION section below.

CAUSE

The compiler doesn't recognize catch blocks within the switch statement. Therefore, the compiler attempts to link the try block to the next catch block outside the switch. In the sample code in the More Information section below, the second catch block is executed after the exception is thrown.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

Sample Code

/* Compile options needed: /GX
*/ 

#include <stdio.h>

void main(void)
{
   int i = 0;

   try
   {
      switch ( i )
      try
      {
         case 0:
            throw i;
      }
      catch( int )
      {
      /* Should be caught here but isn't */ 
         printf( "Passed.\n" );
      }
   }
   catch (...)
   {
   /* Is caught here incorrectly */ 
      printf( "Failed.\n" );
   }
}
 

Additional query words: kbVC400bug 9.00 10.00 10.10 10.20 exception handling

Keywords : kbcode kbCompiler kbCPPonly kbVC kbVC200bug kbVC400bug kbVC410 kbVC420bug kbVC500bug kbVC600bug
Version : winnt:2.0,4.0,4.1,4.2,5.0,6.0
Platform : winnt
Issue type : kbbug