GHCi silently fails to import non-existing modules

[hvr]

E.g.:

$ ghci
GHCi, version 7.4.0.20120126: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Prelude> import Non.Existing.Module
Prelude> :show imports
import Prelude -- implicit
import Non.Existing.Module
Prelude> :m
Prelude> :show imports
import Prelude -- implicit
Prelude> 

whereas in GHC 7.2.2, it behaved like:

GHCi, version 7.2.2: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
Prelude> import Non.Existing.Module

<no location info>:
    Could not find module `Non.Existing.Module'
    Use -v to see a list of the files searched for.

[simonmar]

My fault; I'm testing a fix now.

[simonmar]

Fixed:

commit e46d26686034448a311f48f7e685f159af865d7c

Author: Simon Marlow <marlowsd@gmail.com>
Date:   Wed Feb 1 12:57:54 2012 +0000

    Check that imported modules actually exist (#5836)

[simonmar]

BTW, a test will be along soon.

[pcapriotti]

Merged as 7e8d0137ab58fefc1f4a9ca12344fb0414ef3f45.