#3789: Segfault and -dstg-lint errors using FFI and -XEmptyDataDecls
-----------------------------+----------------------------------------------
Reporter: judahj | Owner:
Type: bug | Status: new
Priority: high | Milestone: 6.12.2
Component: Compiler (NCG) | Version: 6.12.1
Resolution: | Keywords:
Difficulty: | Os: MacOS X
Testcase: | Architecture: x86
Failure: Runtime crash |
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Comment (by simonpj):
I'm afraid the STG Lint failures reflect a bug in STG Lint, not in the
program. I've fixed STG Lint:
{{{
Mon Jan 4 13:46:59 PST 2010 [email protected]
* Fix bugs in STG Lint
The Stg Lint failure reported in Trac #3789 were bogus.
This patch fixes STG Lint, which must have been unused
for ages.
M ./compiler/stgSyn/StgLint.lhs -18 +13
}}}
However, the underlying seg-fault is unaffected. Since it happens with
`-fasm` but not with `-fvia-C` it must be in the code generator.
I believe that the machine code (and STG code) generated from `type Foo_ =
()` and `data Foo_` should be identical. A good first step would be to
see how they differ.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3789#comment:2>
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