Q68145: C1001: Internal Compiler Error: grammar.c, Line 164

Article: Q68145
Product(s): See article
Version(s): 6.00a  | 6.00a
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | buglist6.00a fastcall | mspl13_c
Last Modified: 24-JAN-1991

The sample code below produces the following internal compiler error
when compiled with default optimizations:

   cl /c /Gs t.c

   t.c(10) : fatal error C1001: Internal Compiler Error
                   (compiler file '@(#)grammar.c:1.138', line 164)
                   Contact Microsoft Product Support Services

The following is a list of possible workarounds:

1. Turn off all optimizations (compile with /Od).

2. Remove the _fastcall keyword from the function declaration.

3. Reduce the complex expression by using temporary variables.

4. Compile with the /qc (Quick Compile) option.

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

1: #include<math.h>
2:
3: double _fastcall round(void)
4: {
5:     char *decimal;
6:     double sign;
7:     int right;
8:
9:     right=(int)(((int)(atof(decimal)+1.0))*1.0);
10:    return (sign*(1.0+((double)right)));
11:}

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

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