Q61973: Internal Compiler Error: gencode.c, Line 437

Article: Q61973
Product(s): See article
Version(s): 6.00   | 6.00
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | buglist6.00 | mspl13_c
Last Modified: 29-MAY-1990

The sample code shown below generates the following internal compiler
error when compiled with the /qc compiler option, in all memory
models:

   foo.c(10) : fatal error C1001: Internal Compiler Error
               (compiler file 'gencode.c', line 437)
               Contact Microsoft Product Support Services

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

#include <stdio.h>
#include <stddef.h>

void main (void)
{
   char   *p1, *p2;
   double temp;

   p1 = p2 = NULL;

   temp = 1 + (double)(p2-p1);  // This line causes the error
}

The following is a suggested workaround:

Simplify the expression by assigning (p2-p1) to a temporary variable.
For example:

   ptrdiff_t c;

   c = p2-p1;
   temp = 1 + (double)c;

Note: The error message shown above also occurs when casting "a" to a
float.

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