#10758: the 'impossible' happened -------------------------------------------+------------------------------- Reporter: martinmr | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 7.10.2 Keywords: | Operating System: Linux Architecture: Unknown/Multiple | Type of failure: GHCi crash Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------------+------------------------------- I was working on solving problems 64 and 65 of the Euler project. When I was working on problem 64 I was able to load the file into ghci. I finished the problem and moved on to problem 65. When I tried to load 65.hs in ghci I got ghc: panic! (the 'impossible' happened) (GHC version 7.10.2 for x86_64-unknown-linux): floatExpr tick break<6>() Same thing happened when I tried to load 64.hs (which used to work fine) and a number of other files from problems I had previously solved. Not all files trigger this issue and I have not changed ghc or cabal at all apart from installing the arithmoi and parallel packages. I am attaching my code for problems 64 and 65 in case my code is somehow triggering the bug (you can look at the problem statement at https://projecteuler.net/problem=64 and https://projecteuler.net/problem=65) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10758 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler