Q62310: Internal Compiler Error ‘@(#)newcode.c:1.87’, Line 604

Article: Q62310
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: 22-JUN-1990

The code below, when compiled by Microsoft C 6.00 with default
optimizations for the compact or large memory models, produces the
following error message:

   fatal error C1001: Internal Compiler Error
               (compiler file '@(#)newcode.c:1.87', line 604)
               Contact Microsoft Product Support Services

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

typedef unsigned long   ULONG;

typedef struct
{
    ULONG   a;
}   A;

typedef struct
{
    A       b;
}   B;

B   far *c;

void test( void )
{
    //  Making two separate assignments is OK
    //
    ULONG   ok_1 = (c->b.a);
    ULONG   ok_2 = (ULONG)c + ok_1;

    // But performing the same computation in one
    // assignment causes an internal compiler error.
    //
    ULONG   bomb = (ULONG)c + (c->b.a);
}

The error may be worked around by splitting the assignment into two
separate operations, as seen in the sample code.

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

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