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Q68496: C1001: Internal Compiler Error: grammar.c, Line 140

Article: Q68496
Product(s): See article
Version(s): 6.00a  | 6.00a
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | buglist6.00a | mspl13_c
Last Modified: 1-FEB-1991

The C version 6.00a compiler produces the following internal compiler
error when the sample program below is compiled with /AL and any of
these optimizations: default, /Oa, /Oc, /Oi, /On, /Op, /Or, /Os, /Ot,
/Ow, or /Oz:

   file.c(6) : fatal error C1001: Internal Compiler Error
                (compiler file '../grammar.c', line 140)
                Contact Microsoft Product Support Services

The following are valid workarounds:

1. Compile with one of the following optimizations:

      /Od, /Oe, /Og, /Ol and /Ox

2. Use the optimize pragma to turn off optimizations for the function
   in which the error is occurring.

3. Use the /qc (quick compile) compiler option.

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

void select( int *x, int d, int *y, int *z)
{
   int sx;

   if( x != z && sx < 0)
      x[0] = (-x[0]);      /* this line causes error */
}

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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