val = (StgWord64)m;
if (m < 0 || val < min || val > max) {
- errorBelch("error in RTS option %s: size outside allowed range (%" FMT_Word64 " - %" FMT_Word64 ")",
- flag, min, max);
+ // printf doesn't like 64-bit format specs on Windows
+ // apparently, so fall back to unsigned long.
+ errorBelch("error in RTS option %s: size outside allowed range (%lu - %lu)", flag, (lnat)min, (lnat)max);
stg_exit(EXIT_FAILURE);
}