#9009: Confusing error message when loading package with TH -------------------------------------+------------------------------------- Reporter: jstolarek | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: Component: Package | Version: 7.8.2 system | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: Other | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by thomie): This is still not reproducable for me with 7.8.3 (I get the same error from comment:3). I am using the haskell-platform 2014.02 in the global database, an initially empty user database (deleted ~/.ghc and ~/.cabal) and no sandbox. But it I did reproduce it with a recent HEAD. I followed the steps from comment:2 and also removed the `MINIMAL` pragma from src/Data/Singletons/Prelude/Ord.hs in `singletons-1.0`. {{{ $ uname -a Linux feng-laptop 3.13.0-39-generic #66-Ubuntu SMP Tue Oct 28 13:30:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux $ /opt/ghc/head/bin/ghc-pkg list /opt/ghc/head/lib/ghc-7.9.20141108/package.conf.d Cabal-1.21.1.0 array-0.5.0.1 base-4.8.0.0 bin-package-db-0.0.0.0 binary-0.7.1.0 bytestring-0.10.4.0 containers-0.5.5.1 deepseq-1.3.0.3 directory-1.2.1.1 filepath-1.3.0.3 ghc-7.9.20141108 ghc-prim-0.3.1.0 haskeline-0.7.1.3 haskell2010-1.1.2.1 haskell98-2.0.0.4 hoopl-3.10.0.2 hpc-0.6.0.2 integer-gmp-0.5.1.0 old-locale-1.0.0.7 old-time-1.1.0.3 pretty-1.1.1.1 process-1.2.0.1 rts-1.0 template-haskell-2.10.0.0 terminfo-0.4.0.0 time-1.5 transformers-0.4.1.0 unix-2.7.0.2 xhtml-3000.2.1 /home/thomas/.ghc/x86_64-linux-7.9.20141108/package.conf.d mtl-2.2.1 singletons-1.0 syb-0.4.2 th-desugar-1.4.2 $ /opt/ghc/head/bin/ghc-7.9.20141108 Foo.hs [1 of 1] Compiling Foo ( Foo.hs, Foo.o ) <command line>: can't load .so/.DLL for: /home/thomas/.cabal/lib/x86_64 -linux- ghc-7.9.20141108/singletons-1.0/libHSsingl_LteS7xqJUFW9l0IV1AW3w0-ghc7.9.20141108.so (/home/thomas/.cabal/lib/x86_64-linux- ghc-7.9.20141108/singletons-1.0/libHSsingl_LteS7xqJUFW9l0IV1AW3w0-ghc7.9.20141108.so: undefined symbol: singlzuLteS7xqJUFW9l0IV1AW3w0_DataziSingletonsziSingleziMonad_wrapUnSingFun5_closure) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9009#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler