Hi! I'm in the first month of translating my brain from mira to hs, and seem to have come across an hnc98 bug: my app is the famous infinite-precision scientific math library - see http://freaknet.org/bignum - and while the hs version currently has no known bugs under hugs, when I compile with nhc98 it gives me pi as 3.157..... while sqrt(2) gives a couple of thousand correct decimal places and then segmentation faults. Other calculations run ok. The problem only seems to occur in code that uses the div/mod on Integers, so I'm assuming the problem is in that. I've trimmed down the sqrt2 example to a small source file which is attached and obligingly continues to work under hugs and dump core with nhc98. Unfortunately I don't have another architecture than Linux/x86 to try it on - would someone check whether it does the same on another system? I'm afraid that the wrong-answer of pi is rather hard to extract into a self-contained fragment as it uses the infinite-precision trig functions and they call in the rest of the world. The system is Slackware Linux 9.0 (GCC 3.2.2) on Intel Pentium 3 (Coppermine) with 128MB RAM. Hugs is hugs98 - November 2003 and nhc is nhc98-1.16 both compiled from source tarballs with no problems. I'm online every day or so if there are turther tests I can run to help out. Blessings Martin Guy