#5304: Core lint failure in stage 3 build
---------------------------------+------------------------------------------
Reporter: simonmar | Owner:
Type: bug | Status: merge
Priority: highest | Milestone: 7.2.1
Component: Compiler | Version: 7.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Changes (by simonpj):
* status: new => merge
Comment:
I have reason to believe I have fixed this, with
{{{
commit 0971055c2745b0cb2e167167ceb7a614ea5f8aca
Author: Simon Peyton Jones <[email protected]>
Date: Thu Jul 21 12:54:51 2011 +0100
Eta expand partial applications
When we have
x = \v -> map g
we want to eta-expand to
x = \v y -> map g y
We weren't doing so, and that led to worse code and,
perhaps, #5285. I need to check the latter, but I
was certainly seeing one similar error. Anyway
this looks like a definite improvement
}}}
It's so painful to reproduce the original that I'm just going to close and
hope.
pls merge though
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5304#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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