Q65393: Missing Semicolon Can Cause Internal Compiler Errors

Article: Q65393
Product(s): See article
Version(s): 6.00   | 6.00
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | s_quickc buglist6.00 | mspl13_c
Last Modified: 31-AUG-1990

If a semicolon (;) is missing at the end of a structure definition and
the following statement is a variable declaration of unsigned int or
unsigned char, no compiler error is generated. However, several
different internal compiler errors can be generated depending on what
operating system and compiler you are using.

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

int f(void);

struct foo {
    int x;
    int y;
    }                 // Note: no semicolon

unsigned int goo;

void main(void)
{
   goo = f();
}

The following are the results when the sample code above is compiled
under various operating systems and versions of the C 6.00 compiler:

Compiling Under C 6.00
----------------------

MS-DOS and OS/2 produce the following:

      fatal error C1001: Internal Compiler Error
      (compiler file '@(#)regMD.c:1.100', line 2886)
      Contact Microsoft Product Support Services

Compiling Under C 6.00 with the /qc Option
------------------------------------------

1. MS-DOS produces the following:

      fatal error C1001: Internal Compiler Error
      (compiler file 'gencode.c', line 437)
      Contact Microsoft Product Support Services

2. OS/2 produces the following:

      fatal error C1063:

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.

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