If this gets accepted it will be my first time reporting a compiler bug XD (edit: and **if** it can be submitted without a bugzilla account or whatever)

dmc_uintmax_max.c

/* Digital Mars bug */
/* From stdint.h:
#define UINTMAX_MAX	18446744073709551615

... except that "number is not representable":
the compiler rejects integer literals bigger than ULONG_MAX,
which is 32 bits on windows XD
*/
#include <stdint.h>
#include <limits.h>
int main()
{
    uintmax_t m64 = UINT64_C(UINTMAX_MAX);
    uintmax_t m = UINTMAX_MAX;
    (void)m64;
    return m ? 0 : 1;
}