#6007: ghci: Importing specific non-existent names from a module breaks later
imports
---------------------------------+------------------------------------------
Reporter: josh | Owner: simonmar
Type: bug | Status: new
Priority: normal | Milestone: 7.6.1
Component: GHCi | Version: 7.4.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Changes (by simonmar):
* owner: => simonmar
* difficulty: => Unknown
* component: Compiler => GHCi
* milestone: => 7.6.1
Comment:
Yes, this is a bit unfortunate. You can see what happens with `:show
imports`:
{{{
Prelude> import System.IO(foo)
<interactive>:1:18: Module `System.IO' does not export `foo'
Prelude> :show imports
import Prelude -- implicit
import System.IO ( foo )
Prelude>
}}}
The import is remembered by GHCi and replayed every time the set of
imports changes. We do catch obvious problems such as when the module
does not exist, but not deeper errors like this.
You can recover with `:module -System.IO`:
{{{
Prelude> :module -System.IO
Prelude> :show imports
import Prelude -- implicit
Prelude>
}}}
I shall look into how to fix this, but I think it needs a significant
restructuring.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6007#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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