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A ghci bug

Prelude> let a = [1,2,3]
(0.00 secs, 0 bytes)
Prelude> :print a
a = (_t1::Num t => [t])
Prelude> :t _t1
ghc.exe: panic! (the 'impossible' happened)
  (GHC version 7.8.3 for x86_64-unknown-mingw32):
	tcTyVarDetails t{tv auB} [tv]
Edited by Thomas Miedema
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