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panic on haskell-src-exts

Compiling Bug.hs:

{-# LANGUAGE QuasiQuotes #-}

import Language.Haskell.Exts.QQ (dec)

main :: IO ()
main = return ()
  where 
    foo = [dec| bar = 3 |]

by ghc --make -v -dcore-lint Bug.hs gives

ghc --make -v -dcore-lint Bug.hs 
Glasgow Haskell Compiler, Version 7.10.1, stage 2 booted by GHC version 7.8.4
Using binary package database: /usr/lib/ghc-7.10.1/package.conf.d/package.cache
wired-in package ghc-prim mapped to ghc-prim-0.4.0.0-7c945cc0c41d3b7b70f3edd125671166
wired-in package integer-gmp mapped to integer-gmp-1.0.0.0-3c947e5fb6dca14804d9b2793c521b67
wired-in package base mapped to base-4.8.0.0-1b689eb8d72c4d4cc88f445839c1f01a
wired-in package rts mapped to builtin_rts
wired-in package template-haskell mapped to template-haskell-2.10.0.0-e895139a0ffff267d412e3d0191ce93b
wired-in package ghc mapped to ghc-7.10.1-325809317787a897b7a97d646ceaa3a3
wired-in package dph-seq not found.
wired-in package dph-par not found.
Hsc static flags: 
wired-in package ghc-prim mapped to ghc-prim-0.4.0.0-7c945cc0c41d3b7b70f3edd125671166
wired-in package integer-gmp mapped to integer-gmp-1.0.0.0-3c947e5fb6dca14804d9b2793c521b67
wired-in package base mapped to base-4.8.0.0-1b689eb8d72c4d4cc88f445839c1f01a
wired-in package rts mapped to builtin_rts
wired-in package template-haskell mapped to template-haskell-2.10.0.0-e895139a0ffff267d412e3d0191ce93b
wired-in package ghc mapped to ghc-7.10.1-325809317787a897b7a97d646ceaa3a3
wired-in package dph-seq not found.
wired-in package dph-par not found.
*** Chasing dependencies:
Chasing modules from: *Bug.hs
Stable obj: []
Stable BCO: []
Ready for upsweep
  [NONREC
      ModSummary {
         ms_hs_date = 2015-04-09 10:01:43.312180074 UTC
         ms_mod = Main,
         ms_textual_imps = [import (implicit) Prelude,
                            import Language.Haskell.Exts.QQ ( dec )]
         ms_srcimps = []
      }]
*** Deleting temp files:
Deleting: 
compile: input file Bug.hs
Created temporary directory: /tmp/ghc7356_0
*** Checking old interface for Main:
[1 of 1] Compiling Main             ( Bug.hs, Bug.o )
*** Parser:
*** Renamer/typechecker:
*** Simplify:
*** CorePrep:
*** ByteCodeGen:
Loading package ghc-prim-0.4.0.0 ... linking ... done.
*** gcc:
/usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -L/usr/lib/ghc-7.10.1/integ_2aU3IZNMF9a7mQ0OzsZ0dS --print-file-name libgmp.so
Loading package integer-gmp-1.0.0.0 ... linking ... done.
Loading package base-4.8.0.0 ... linking ... done.
Loading package array-0.5.1.0 ... linking ... done.
Loading package filepath-1.4.0.0 ... linking ... done.
Loading package deepseq-1.4.1.1 ... linking ... done.
Loading package time-1.5.0.1 ... linking ... done.
Loading package bytestring-0.10.6.0 ... linking ... done.
*** gcc:
/usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -L/usr/lib/ghc-7.10.1/unix_G4Yo1pNtYrk8nCq1cx8P9d --print-file-name librt.so
*** gcc:
/usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -L/usr/lib/ghc-7.10.1/unix_G4Yo1pNtYrk8nCq1cx8P9d --print-file-name libutil.so
*** gcc:
/usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -L/usr/lib/ghc-7.10.1/unix_G4Yo1pNtYrk8nCq1cx8P9d --print-file-name libdl.so
*** gcc:
/usr/bin/gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -L/usr/lib/ghc-7.10.1/unix_G4Yo1pNtYrk8nCq1cx8P9d --print-file-name libpthread.so
Loading package unix-2.7.1.0 ... linking ... done.
Loading package directory-1.2.2.0 ... linking ... done.
Loading package old-locale-1.0.0.7 ... linking ... done.
Loading package old-time-1.1.0.3 ... linking ... done.
Loading package text-1.2.0.4 ... linking ... done.
Loading package polyparse-1.11 ... linking ... done.
Loading package cpphs-1.19 ... linking ... done.
Loading package pretty-1.1.2.0 ... linking ... done.
Loading package haskell-src-exts-1.16.0.1 ... linking ... done.
Loading package syb-0.4.4 ... linking ... done.
Loading package template-haskell-2.10.0.0 ... linking ... done.
Loading package transformers-0.4.2.0 ... linking ... done.
Loading package mtl-2.2.1 ... linking ... done.
Loading package nats-1 ... linking ... done.
Loading package th-lift-0.7.2 ... linking ... done.
Loading package containers-0.5.6.2 ... linking ... done.
Loading package safe-0.3.8 ... linking ... done.
Loading package th-expand-syns-0.3.0.6 ... linking ... done.
Loading package th-reify-many-0.1.3 ... linking ... done.
Loading package th-orphans-0.11.1 ... linking ... done.
Loading package haskell-src-meta-0.6.0.9 ... linking ... done.
Loading package haskell-src-exts-qq-0.6.1 ... linking ... done.

Bug.hs:8:16:*** Deleting temp files:
Deleting: /tmp/ghc7356_0/ghc7356_1.s
Warning: deleting non-existent /tmp/ghc7356_0/ghc7356_1.s
*** Deleting temp dirs:
Deleting: /tmp/ghc7356_0
ghc: panic! (the 'impossible' happened)
  (GHC version 7.10.1 for x86_64-unknown-linux):
	qual_pkg haskell-src-exts-1.16.0.1

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

on my machine:

$ uname -a
Linux io 3.19.3-1-ARCH #1 SMP PREEMPT Thu Mar 26 14:56:16 CET 2015 x86_64 GNU/Linux

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc/src/gcc-4.9-20150304/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-cloog-backend=isl --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --disable-multilib --disable-werror --enable-checking=release
Thread model: posix
gcc version 4.9.2 20150304 (prerelease) (GCC)

$ ghc-pkg list
/usr/lib/ghc-7.10.1/package.conf.d
   Cabal-1.22.2.0
   array-0.5.1.0
   async-2.0.2
   base-4.8.0.0
   bin-package-db-0.0.0.0
   binary-0.7.3.0
   bytestring-0.10.6.0
   containers-0.5.6.2
   cpphs-1.19
   deepseq-1.4.1.1
   directory-1.2.2.0
   filepath-1.4.0.0
   ghc-7.10.1
   ghc-paths-0.1.0.9
   ghc-prim-0.4.0.0
   haddock-api-2.16.0
   haddock-library-1.2.0
   haskeline-0.7.2.1
   haskell-src-exts-1.16.0.1
   haskell-src-exts-qq-0.6.1
   haskell-src-meta-0.6.0.9
   hoopl-3.10.0.2
   hpc-0.6.0.2
   integer-gmp-1.0.0.0
   minisat-0.1.1
   mtl-2.2.1
   nats-1
   old-locale-1.0.0.7
   old-time-1.1.0.3
   polyparse-1.11
   pretty-1.1.2.0
   process-1.2.3.0
   rts-1.0
   safe-0.3.8
   satchmo-core-0.8.0
   stm-2.4.4
   syb-0.4.4
   template-haskell-2.10.0.0
   terminfo-0.4.0.1
   text-1.2.0.4
   th-expand-syns-0.3.0.6
   th-lift-0.7.2
   th-orphans-0.11.1
   th-reify-many-0.1.3
   time-1.5.0.1
   transformers-0.4.2.0
   unix-2.7.1.0
   xhtml-3000.2.1
Edited by Ben Gamari
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