On Sunday, 29 September 2013 at 17:59:23 UTC, Joseph Rushton Wakeling wrote: > On 29/09/13 16:46, MrSmith wrote: >> use -debug -gc > > Nope, I still get just the "floating point exception" message. I've used for this compilation the following command: dmd -property -debug -gc rational.d test.d -of"test.exe" Are you catching and printing exception?