[Haskell-cafe] Symbol collisions with -fhpc

[Michael Orlitzky]

On 11/08/11 22:33, Jason Dagit wrote:
> On Tue, Nov 8, 2011 at 9:40 AM, Michael Orlitzky <michael at orlitzky.com> wrote:
>> Does anyone know what causes these? This used to work, like, a month
>> ago. It builds fine without the -fhpc.
> 
> What has changed in that time?  New Ghc?  New updates from your OS?
> New code in your project?  Because it builds fine without -fhpc it
> sounds like a ghc bug.
> 
> What version of ghc and on what OS?  Is this 64 bit or 32bit?
> 
> Basically, I think we need more information to be helpful.
> 

Gentoo, amd64. Happens on at least two different machines. There have
been plenty of code changes since it worked last, but no OS/GHC updates.
If I check out a revision from last month, it compiles.

*shrug*

$ ghc -v
Glasgow Haskell Compiler, Version 7.2.1, stage 2 booted by GHC version 7.2.1
Using binary package database:
/usr/lib64/ghc-7.2.1/package.conf.d/package.cache
Using binary package database:
/home/mjo/.ghc/x86_64-linux-7.2.1/package.conf.d/package.cache
hiding package time-1.1.2.0 to avoid conflict with later version
time-1.2.0.5
hiding package Cabal-1.11.1.20110721 to avoid conflict with later
version Cabal-1.12.0
wired-in package ghc-prim mapped to
ghc-prim-0.2.0.0-ecbedc87f49c27f03f71d60d1f66a3f5
wired-in package integer-gmp mapped to
integer-gmp-0.3.0.0-750d9a09d190332c9f798272235395cb
wired-in package base mapped to
base-4.4.0.0-2247d6528c0406cfbae549d8aa2b3bc5
wired-in package rts mapped to builtin_rts
wired-in package template-haskell mapped to
template-haskell-2.6.0.0-2150e2669e8f89e9f639db3b2ec85a00
wired-in package dph-seq not found.
wired-in package dph-par not found.
Hsc static flags: -static
*** Deleting temp files:
Deleting:
*** Deleting temp dirs:
Deleting:
ghc: no input files
Usage: For basic information, try the `--help' option.