Turbo C Problem?

[daver at hcx2.SSD.HARRIS.COM]

The following dumb, little program is compiled with Turbo-C 1.0, running under
MS-DOS 3.2.  Shortly after starting up, the C compiler goes berserk.  The
screen flashes in reverse video and the operating system reboots itself.
In a larger example, the auto-reboot does not take place, but the C compiler
hangs up, the recommended "control-break to quit" has no effect, and I have
to reboot the system anyway.  What is going on?  Is this a C compiler
problem?  Would there be any difference in version 1.5?

#define R 41
#define C 480
main()
{
   struct
   {
      unsigned a:1;
   } b[R][C];

   int i, j;
     for (i=0; i<R; ++i)
      for (j=0; j<C; ++j)
      {
         b[i][j].a = 0;
      }
}