thread blocked indefinitely in an MVar operation
*Main> take 24 [13,26..]
[13,26,39,52,65,78,91,104,117,130,143,156,169,182,195,208,221,234,247,260,273,286,299,312]
*Main> cycle [1,2,3]
[1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,
*Main>
*Main>
*Main>
*Main> take 10 (cycle [1,2,3])
[1,2,3,1,2,3,1,2,3,1]
*Main> take 10 (cycle "Hel")
ghc.exe: panic! (the 'impossible' happened)
(GHC version 7.10.3 for x86_64-unknown-mingw32):
thread blocked indefinitely in an MVar operation
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug