Microsoft KB Archive/173092

= FIX: /Og Causes C1001 Traversing Non-Trivial List of Pointers =

Article ID: 173092

Article Last Modified on 7/5/2005

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APPLIES TO


 * Microsoft Visual C++ 5.0 Enterprise Edition
 * Microsoft Visual C++ 5.0 Professional Edition

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This article was previously published under Q173092



SYMPTOMS
Compiling code similar to that in the sample below may cause the following error to be generated:

fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'E:\utc\src\\P2\main.c', line 379)



RESOLUTION
In the sample below, initializing all the local integers to known values, instead of leaving them uninitialized, will allow the code below to compile without generating the C1001 error.



STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Studio 97 Service Pack 3.

For more information, please see the following article in the Microsoft Knowledge Base:

170365 INFO: Visual Studio 97 Service Packs - What, Where, and Why



Sample
// compile options: /Og /c struct B;  struct A { B * pB; };  struct B { A * pA; B * pBnext; B * pBb; } ;  void f { int i;   // initialize for workaround int j;   // initialize for workaround int k = 0; B * pB1; B * pB2 = 0; B * pB3; B * rgpB[2]; int rgi[2]; while(1) {        rgi[i] = k++; pB2 = pB2->pBb; rgpB[k] = pB2; j = k++; pB3 = rgpB[j]; pB1 = pB3->pA->pB; while (pB1) pB1 = pB1->pBnext; }  }

Additional query words: ICE

Keywords: kberrmsg kbbug kbfix kbvs97sp2fix kbcpponly kbcompiler KB173092

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