#2355: Building NDP fails with GHC panic on x86_64
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Reporter: Nolari | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.9
Severity: major | Resolution:
Keywords: ndp ghc panic | Difficulty: Unknown
Testcase: | Architecture: x86_64 (amd64)
Os: Linux |
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Comment (by Nolari):
It's not clear to me how to build NDP with `-dcore-lint` turned on (or
`-fno-ds-multi-tyvar` for that matter). I tried fiddling with the
`Makefile`s and `ndp.mk` but they didn't seem to have any effect on `make
make.library.ndp`, and neither did adding `{-# OPTIONS_GHC -dcore-lint
#-}` to the offending file. I also haven't really figured out what the
exact GHC invocation is to build the file by hand.
On a whim, I tried to just do a clean build (`make remake.library.ndp`)
and then the compilation actually got past the file where it got stuck
before! It then gave the same "error in desugarer lookup"-panic on a
different file, I added `{-# OPTIONS_GHC -dcore-lint #-}` to that file and
did a new remake, and it got further again.
In this way I've been able to finally build NDP. :) But the process seems
to be non-deterministic! Doing a remake sometimes succeeds and sometimes
doesn't, and if it doesn't then the offending file isn't even always the
same. Sometimes it's one of the files where I added `{-# OPTIONS_GHC
-dcore-lint #-}`, but even then I'm still not getting any extra output
such as rl provided.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2355#comment:5>
GHC <http://www.haskell.org/ghc/>
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