[project @ 2000-09-07 11:42:49 by simonpj]
1) Fix a bad bug in Subst.lhs that made uniqAway go into an infinite loop when the 'hash code' in the in-scope set was zero. 2) Rename BasicTypes.isFragileOccInfo to isFragileOcc Add isDeadOcc to BasisTypes (2) is just a tidy-up. I have to commit it now because of (1), which is a bad bug. I hope that I've committed all the files involved in (2).