-ddump-minimal-imports confused if first line is an import

On reddit, Chris Done posted this example:

chris@midnight:~$ cat > x.hs
import Control.Applicative
main = show <$> pure 1 >>= print
chris@midnight:~$ ghc x.hs -ddump-minimal-imports
[1 of 1] Compiling Main             ( x.hs, x.o )
Linking x ...
cachris@midnight:~$ cat Main.imports
import Control.Applicative
    ( print, (>>=), show, Applicative(pure), (<$>) )

I noted that this is wrong, for example print isn't exported from Control.Applicative:

>>> import Control.Applicative (print)

<interactive>:1:29:
    Module `Control.Applicative' does not export `print'

hvr explains: for some reason GHC gets confused if the very first string in the .hs file is import; try adding anything, such as a newline or module Main where and it works as expected...

I couldn't find a relevant bug for this.

Trac metadata

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