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| author | simonpj@microsoft.com <unknown> | 2008-09-17 16:29:10 +0000 |
|---|---|---|
| committer | simonpj@microsoft.com <unknown> | 2008-09-17 16:29:10 +0000 |
| commit | 3b896bc3a6fbc19ee311849aed046edcd75dca62 (patch) | |
| tree | d9ff00fdd59f3435c82bb6c9cfb0c1695b8295f1 /compiler/codeGen | |
| parent | 0ac253aac15a6d5bcfa54be310531203a5456a0a (diff) | |
| download | haskell-3b896bc3a6fbc19ee311849aed046edcd75dca62.tar.gz | |
Fix nasty infelicity: do not short-cut empty substitution in the simplifier
I was perplexed about why an arity-related WARN was tripping. It took
me _day_ (sigh) to find that it was because SimplEnv.substExpr was taking
a short cut when the substitution was empty, thereby not subsituting for
Ids in scope, which must be done (CoreSubst Note [Extending the Subst]).
The fix is a matter of deleting the "optimisation". Same with
CoreSubst.substSpec, although I don't know if that actually caused a
probem.
Diffstat (limited to 'compiler/codeGen')
0 files changed, 0 insertions, 0 deletions