#7447: Stale .hi files affect compilation.
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Reporter: int-e | Owner:
Type: bug | Status: new
Priority: high | Milestone: 7.6.2
Component: Compiler | Version: 7.6.1
Keywords: | Os: Linux
Architecture: x86_64 (amd64) | Failure: Incorrect warning at compile-time
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Changes (by simonmar):
* priority: normal => high
* difficulty: => Unknown
* milestone: => 7.6.2
* failure: None/Unknown => Incorrect warning at compile-time
Comment:
Reproduced, and it still happens with HEAD. Here's the relevant bit:
{{{
> echo 'module Peaker(L(..)) where{ data V = V {-# UNPACK #-} !L; data L =
L V }' > Peaker.hs
> ghc -fforce-recomp -O1 Peaker.hs
[1 of 1] Compiling Peaker ( Peaker.hs, Peaker.o )
Peaker.hs:1:38: Warning:
Ignoring unusable UNPACK pragma on the first argument of `V'
In the definition of data constructor `V'
In the data declaration for `V'
> ghc -fforce-recomp -O1 Peaker.hs
[1 of 1] Compiling Peaker ( Peaker.hs, Peaker.o )
>
}}}
The warning should have been produced the second time.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7447#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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