ghci line numbers are off by one

rwbarton@morphism:/tmp$ ghci-7.10.1 
GHCi, version 7.10.1: http://www.haskell.org/ghc/  :? for help
Prelude> 3 : 'a'

<interactive>:2:5:
    Couldn't match expected type ‘[a]’ with actual type ‘Char’
    Relevant bindings include it :: [a] (bound at <interactive>:2:1)
    In the second argument of ‘(:)’, namely ‘'a'’
    In the expression: 3 : 'a'
    In an equation for ‘it’: it = 3 : 'a'
Prelude> 3 : 'a'

<interactive>:3:5:
    Couldn't match expected type ‘[a]’ with actual type ‘Char’
    Relevant bindings include it :: [a] (bound at <interactive>:3:1)
    In the second argument of ‘(:)’, namely ‘'a'’
    In the expression: 3 : 'a'
    In an equation for ‘it’: it = 3 : 'a'
Prelude>

Why are the errors reported as being on lines 2 and 3? And no, I don't buy that line 1 was the GHCi welcome message :)

Apparently it's been like this since at least GHC 7.4 and I've never noticed.

ghc -e cmd1 -e cmd2 reports every command as beginning on a new line 1, which is also weird.

Trac metadata

Trac field	Value
Version	7.10.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	Unresolved
Component	GHCi
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	hvr
Operating system
Architecture