[GHC] #9010: TemplateHaskell leads to an "unknown symbol" error

[GHC]

#9010: TemplateHaskell leads to an "unknown symbol" error
-------------------------------------+-------------------------------------
        Reporter:  Feuerbach         |                Owner:
            Type:  bug               |               Status:  infoneeded
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by basvandijk):

 rwbarton, thanks for investigating!

 It seems I'm using a dynamic GHC:

 {{{
 $ ghc --info
  [("Project name","The Glorious Glasgow Haskell Compilation System")
  ,("GCC extra via C opts"," -fwrapv")
  ,("C compiler command","/nix/store/klnq8izadq9c5jpg5swfak8kp2zwiijz-gcc-
 wrapper-4.9.3/bin/cc")
  ,("C compiler flags"," -fno-stack-protector")
  ,("C compiler link flags","")
  ,("Haskell CPP command","/nix/store/klnq8izadq9c5jpg5swfak8kp2zwiijz-gcc-
 wrapper-4.9.3/bin/cc")
  ,("Haskell CPP flags","-E -undef -traditional ")
  ,("ld command","/nix/store/klnq8izadq9c5jpg5swfak8kp2zwiijz-gcc-
 wrapper-4.9.3/bin/ld")
  ,("ld flags","")
  ,("ld supports compact unwind","YES")
  ,("ld supports build-id","YES")
  ,("ld supports filelist","NO")
  ,("ld is GNU ld","YES")
  ,("ar
 command","/nix/store/v7h3j43vx0dz5ahhkxg5z50by2iqc6k1-binutils-2.23.1/bin/ar")
  ,("ar flags","q")
  ,("ar supports at file","YES")
  ,("touch command","touch")
  ,("dllwrap command","/bin/false")
  ,("windres command","/bin/false")
  ,("libtool command","libtool")
  ,("perl command","/nix/store/lhgkssg79bxdba541h75mgdvjh35b8ic-
 perl-5.20.2/bin/perl")
  ,("cross compiling","NO")
  ,("target os","OSLinux")
  ,("target arch","ArchX86_64")
  ,("target word size","8")
  ,("target has GNU nonexec stack","True")
  ,("target has .ident directive","True")
  ,("target has subsections via symbols","False")
  ,("Unregisterised","NO")
  ,("LLVM llc command","llc")
  ,("LLVM opt command","opt")
  ,("Project version","7.10.2")
  ,("Project Git commit id","0da488c4438d88c9252e0b860426b8e74b5fc9e8")
  ,("Booter version","7.8.4")
  ,("Stage","2")
  ,("Build platform","x86_64-unknown-linux")
  ,("Host platform","x86_64-unknown-linux")
  ,("Target platform","x86_64-unknown-linux")
  ,("Have interpreter","YES")
  ,("Object splitting supported","YES")
  ,("Have native code generator","YES")
  ,("Support SMP","YES")
  ,("Tables next to code","YES")
  ,("RTS ways","l debug thr thr_debug thr_l thr_p dyn debug_dyn thr_dyn
 thr_debug_dyn l_dyn thr_l_dyn")
  ,("Support dynamic-too","YES")
  ,("Support parallel --make","YES")
  ,("Support reexported-modules","YES")
  ,("Support thinning and renaming package flags","YES")
  ,("Uses package keys","YES")
  ,("Dynamic by default","NO")
  ,("GHC Dynamic","YES")
  ,("Leading underscore","NO")
  ,("Debug on","False")
  ,("LibDir","/nix/store/aivgsc0vbnq2vi8fzw9xjkrlgayfqppv-
 ghc-7.10.2/lib/ghc-7.10.2")
  ,("Global Package DB","/nix/store/aivgsc0vbnq2vi8fzw9xjkrlgayfqppv-
 ghc-7.10.2/lib/ghc-7.10.2/package.conf.d")
  ]
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9010#comment:12>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler