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Q62072: C1001: Internal Compiler Error: ‘@(#)regMD.c:1.100’, Line 4634

Article: Q62072
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: 15-AUG-1990

The sample program show below, when compiled for compact or large
memory model, produces the following error under default
optimizations:

   fatal error C1001: Internal Compiler Error
       (compiler file '@(#)regMD.c:1.100', line 4634)
       Contact Microsoft Product Support Services

Sample Program
--------------

#include<stdio.h>

typedef struct window
{
    int *fld;
    int f_cursor, l_cursor;
} WINDOW;

void test(int,int);

void foo(WINDOW *w)
{
 test(w->fld[w->f_cursor],w->fld[w->f_cursor+1]-w->fld[w->f_cursor]);
}

Microsoft has confirmed this to be a problem with Microsoft C version
6.00. We are researching this problem and will post new information
here as it becomes available.

The following are several possible workarounds:

1. Enable global register allocation during compilation (/Oe).

2. Disable optimizations globally (/Od).

3. Disable optimizations locally with #pragma("",off).

4. Simplify the function call through the use of temporary variables.

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