Nonsense evaluation: sequence [] = []

$ ghci-7.6.2
GHCi, version 7.6.2: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
>>> sequence []
[]
>>> :t it
it :: [()]
>>> sequence [] :: [()]

<interactive>:4:1:
    Couldn't match type `[a0]' with `()'
    Expected type: [()]
      Actual type: [[a0]]
    In the return type of a call of `sequence'
    In the expression: sequence [] :: [()]
    In an equation for `it': it = sequence [] :: [()]

Wat. Where on earth did ghci get the idea that sequence [] = []?

Trac metadata

Trac field	Value
Version	7.6.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture