Multiline input (‘:set +m’) terminated by trailing whitespace

$ ghci -ignore-dot-ghci
GHCi, version 8.0.1: http://www.haskell.org/ghc/  :? for help
Prelude> :set +m
Prelude> let
Prelude| a :: Int
Prelude| a = 5
Prelude| 
Prelude> 

works fine with multiline input, but if you add one trailing space it immediately terminates the input

Prelude> let
Prelude| a :: Int␣

<interactive>:11:1: error:
    The type signature for ‘a’ lacks an accompanying binding

I don't know if this is the desired behavior but this means I can't copy/paste code into GHCi that has a trailing whitespace.

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	GHCi
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