Q62701: C1001: Internal Compiler Error: ‘../grammar.c’, Line 140

Article: Q62701
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: 31-AUG-1990

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

   foo.c(14) : fatal error C1001: Internal Compiler Error
               (compiler file '../grammar.c', line 140)
               Contact Microsoft Product Support Services

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

#include <malloc.h>

int a[2];

void test(void)
{
   int b;
   char *c;

   c=(char *)malloc(100);

   b=*(int*)(c+a[0])+*(int *)(c+a[1]);
}

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 expression through the use of temporary variables.

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

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