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Inconsistent handling of leading whitespace in GHCi

In GHCi, the following three lines all work as expected:

λ» let x = 1
λ» x
1
λ»  let x = 2 -- Note leading whitespace
λ» x
2
λ» data Foo = Foo
λ» :i Foo
data Foo = Foo 	-- Defined at <interactive>:6:1

However, this fails:

λ»  data Bar = Bar -- Note leading whitespace

<interactive>:8:2: parse error on input ‘data’
Trac metadata
Trac field Value
Version 7.8.3
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler (Parser)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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