KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q66430: C1001: Internal Compiler Error: @(#)exphelp.c:1.115, Line 391

Article: Q66430
Product(s): See article
Version(s): 6.00   | 6.00
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | buglist6.00 fixlist6.00a | mspl13_c
Last Modified: 9-NOV-1990

The sample code below will produce the following internal compiler
error when compiled with both /Oi and /Oe optimizations:

   sample.c(10) : fatal error C1001: Internal Compiler Error
                      (compiler file '@(#)exphelp.c:1.115', line 391)
                      Contact Microsoft Product Support Services

The following are several workarounds to this particular internal
compiler error.

1. Avoid using the optimizations /Oi and /Oe together.

2. Insert the #pragma optimize statement into the code to turn off the
   offending optimizations for the particular function.

3. Use temporary variables to simplify the expression on line 10.

Sample Code
-----------

1:      #include <math.h>
2:      void main(void)
3:      {
4:           double x, y, z;
5:           struct {
6:                   double d;
7:           } data;
8:
9:           z=2.0 * x;
10:          data.d=(2.0*x) / sqrt( pow(2.0-y,2) + pow(z,2) );
11:     }

Microsoft has confirmed this to be a problem in C version 6.00. This
problem has been corrected in version 6.00a.

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.