"ghc-6.6: panic! (the 'impossible' happened) interactiveUI:flush" when hiding haskell98 and importing IO
I was trying to compile John Macheam's "GetOptions" with ghc-6.6. It failed saying
ben@sarun: .../repos/GetOptions > runhaskell Setup.hs build
Preprocessing library GetOptions-1.0...
Building GetOptions-1.0...
GetOptions.hs:31:7:
Could not find module `IO':
it is a member of package haskell98, which is hidden
I exposed haskell98:
ben@sarun: .../repos/GetOptions > sudo ghc-pkg expose haskell98
Saving old package config file... done.
Writing new package config file... done.
But still no luck... Anyway then I said to myself "forget it, just use the hierarchical library stuff", hid haskell98 package again, and changed the import stuff a bit (see below). Result:
ben@sarun: .../repos/GetOptions > runhaskell Setup.hs build
<interactive>:1:84:
Failed to load interface for `IO':
it is a member of package haskell98, which is hidden
ghc-6.6: panic! (the 'impossible' happened)
(GHC version 6.6 for x86_64-unknown-linux):
interactiveUI:flush
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
This is the "fix" I applied:
ben@sarun: .../repos/GetOptions > darcs whatsnew
{
hunk ./GetOptions.hs 27
-import List
+import Data.List
hunk ./GetOptions.hs 30
-import System
-import IO
+import System.IO
+--import IO
}
Here is the repo I pulled from, so maybe you can reproduce the bug:
ben@sarun: .../repos/GetOptions > cat _darcs/prefs/defaultrepo
http://repetae.net/john/repos/GetOptions
I could be that my ghc installation is completely screwed up but I wouldn't know how or why.
Ben
Trac metadata
Trac field | Value |
---|---|
Version | 6.6 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | Unknown |
Architecture | Unknown |