#7354: Panic with recursion-schemes package and unit
------------------------+---------------------------------------------------
Reporter: amplitwist | Owner:
Type: bug | Status: new
Priority: normal | Component: GHCi
Version: 7.6.1 | Keywords:
Os: Linux | Architecture: x86_64 (amd64)
Failure: GHCi crash | Testcase:
Blockedby: | Blocking:
Related: |
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Steps to reproduce:
1. Install GHC 7.6.1 and recursion-schemes
([http://hackage.haskell.org/package/recursion-schemes])
2. Create a new .hs file with the following
--------------
import Data.Functor.Foldable
foo = embed ()
--------------
3. Load the file into GHCI
4. Evaluate foo
*Main> foo
<interactive>:162:1:
Can't find interface-file declaration for variable foo
Probable cause: bug in .hi-boot file, or inconsistent .hi file
Use -ddump-if-trace to get an idea of which file caused the error
In the expression: foo
In an equation for `it': it = foo
*Main> :t foo
<interactive>:1:1:
Can't find interface-file declaration for variable foo
Probable cause: bug in .hi-boot file, or inconsistent .hi file
Use -ddump-if-trace to get an idea of which file caused the error
In the expression: foo
5. Evaluate ``embed ()'' directly at the REPL
*Main> embed ()
ghc: panic! (the 'impossible' happened)
(GHC version 7.6.1 for x86_64-unknown-linux):
nameModule
<<details unavailable>>
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
--------------
System Information:
[andy@vanir ~]$ uname -a
Linux vanir 3.5.6-1-ARCH #1 SMP PREEMPT Sun Oct 7 19:30:49 CEST 2012
x86_64 GNU/Linux
[andy@vanir ~]$ ls asdf.hi # the would-be .hi file
ls: cannot access asdf.hi: No such file or directory
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7354>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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