ghc panic
Apologies if this is an inappropriate bug report - I'm new to Haskell and haven't figured out how to navigate around the possible errors....
I have now noticed (at least some of) the errors in the following but I get a ghc panic when I load this into ghci:
---rectPolh.hs data Point2D = Cartesian2D Double Double
| Polar2D Double Double
deriving (Eq,show)
instance Eq Point2D where
Cartesian2D x y == Polar2D r theta =
x == rx && y == ry
where rx=r * cos theta
ry=r * sin theta
i.e.
GHCi, version 7.4.2: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Prelude> :load rectPol.hs [1 of 1] Compiling Main ( rectPol.hs, interpreted ) ghc: panic! (the 'impossible' happened)
(GHC version 7.4.2 for x86_64-apple-darwin):
nameModule show{tv aaH}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Trac metadata
Trac field | Value |
---|---|
Version | 7.4.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | GHCi |
Test case | |
Differential revisions | |
BlockedBy | |
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Blocking | |
CC | |
Operating system | |
Architecture |