#5285: Core lint error in T3001-2 [7.0 regression]
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Reporter: simonmar | Owner: simonpj
Type: bug | Status: new
Priority: highest | Milestone: 7.2.1
Component: Compiler | Version: 7.0.3
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: Compile-time crash
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Comment(by simonpj@…):
commit 0971055c2745b0cb2e167167ceb7a614ea5f8aca
{{{
Author: Simon Peyton Jones <simo...@microsoft.com>
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
compiler/simplCore/SimplUtils.lhs | 28 ++++++++++++++++++++++++----
1 files changed, 24 insertions(+), 4 deletions(-)
}}}
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5285#comment:4>
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