I am trying to debug a package in which there is a divide by 0 error and attempting to use Simon Marlow’s stack traces: https://simonmar.github.io/posts/2016-02-12-Stack-traces-in-GHCi.html. However ghci is complaining about missing symbols. What do I need to add to the command line to coax ghci into giving me a stack trace?
> ~/Dropbox/Private/Stochastic/demo $ ghci -fexternal-interpreter -prof > fe-handling-example.o -i../../monad-bayes/src > -package-db=.cabal-sandbox/x86_64-osx-ghc-8.0.1-packages.conf.d > GHCi, version 8.0.1: http://www.haskell.org/ghc/ :? for help > Prelude> :l app/Main.hs > [ 1 of 16] Compiling Control.Monad.Bayes.LogDomain ( > ../../monad-bayes/src/Control/Monad/Bayes/LogDomain.hs, interpreted ) > [ 2 of 16] Compiling Control.Monad.Bayes.Primitive ( > ../../monad-bayes/src/Control/Monad/Bayes/Primitive.hs, interpreted ) > [ 3 of 16] Compiling Control.Monad.Bayes.Class ( > ../../monad-bayes/src/Control/Monad/Bayes/Class.hs, interpreted ) > [ 4 of 16] Compiling Control.Monad.Bayes.Sampler ( > ../../monad-bayes/src/Control/Monad/Bayes/Sampler.hs, interpreted ) > [ 5 of 16] Compiling Control.Monad.Bayes.Sequential ( > ../../monad-bayes/src/Control/Monad/Bayes/Sequential.hs, interpreted ) > [ 6 of 16] Compiling Control.Monad.Bayes.Prior ( > ../../monad-bayes/src/Control/Monad/Bayes/Prior.hs, interpreted ) > [ 7 of 16] Compiling Control.Monad.Bayes.Rejection ( > ../../monad-bayes/src/Control/Monad/Bayes/Rejection.hs, interpreted ) > [ 8 of 16] Compiling Control.Monad.Bayes.Weighted ( > ../../monad-bayes/src/Control/Monad/Bayes/Weighted.hs, interpreted ) > [ 9 of 16] Compiling Control.Monad.Bayes.Population ( > ../../monad-bayes/src/Control/Monad/Bayes/Population.hs, interpreted ) > [10 of 16] Compiling Control.Monad.Bayes.Deterministic ( > ../../monad-bayes/src/Control/Monad/Bayes/Deterministic.hs, interpreted ) > [11 of 16] Compiling Control.Monad.Bayes.Conditional ( > ../../monad-bayes/src/Control/Monad/Bayes/Conditional.hs, interpreted ) > [12 of 16] Compiling Control.Monad.Bayes.Dist ( > ../../monad-bayes/src/Control/Monad/Bayes/Dist.hs, interpreted ) > [13 of 16] Compiling Control.Monad.Bayes.Coprimitive ( > ../../monad-bayes/src/Control/Monad/Bayes/Coprimitive.hs, interpreted ) > [14 of 16] Compiling Control.Monad.Bayes.Trace ( > ../../monad-bayes/src/Control/Monad/Bayes/Trace.hs, interpreted ) > [15 of 16] Compiling Control.Monad.Bayes.Inference ( > ../../monad-bayes/src/Control/Monad/Bayes/Inference.hs, interpreted ) > [16 of 16] Compiling Main ( app/Main.hs, interpreted ) > > app/Main.hs:92:7: warning: [-Wunused-matches] > Defined but not used: ‘a’ > > app/Main.hs:92:9: warning: [-Wunused-matches] > Defined but not used: ‘prevP’ > > app/Main.hs:92:15: warning: [-Wunused-matches] > Defined but not used: ‘prevZ’ > > app/Main.hs:106:5: warning: [-Wunused-do-bind] > A do-notation statement discarded a result of type ‘GHC.Prim.Any’ > Suppress this warning by saying > ‘_ <- ($) > error (++) "You are here " (++) show state (++) " " show p_obs’ > Ok, modules loaded: Main, Control.Monad.Bayes.LogDomain, > Control.Monad.Bayes.Primitive, Control.Monad.Bayes.Class, > Control.Monad.Bayes.Population, Control.Monad.Bayes.Conditional, > Control.Monad.Bayes.Inference, Control.Monad.Bayes.Sampler, > Control.Monad.Bayes.Rejection, Control.Monad.Bayes.Weighted, > Control.Monad.Bayes.Sequential, Control.Monad.Bayes.Trace, > Control.Monad.Bayes.Dist, Control.Monad.Bayes.Prior, > Control.Monad.Bayes.Deterministic, Control.Monad.Bayes.Coprimitive. > *Main> main > ghc-iserv-prof: > lookupSymbol failed in relocateSection (relocate external) > /Users/dom/Dropbox/Private/Stochastic/demo/.cabal-sandbox/lib/x86_64-osx-ghc-8.0.1/hmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ/libHShmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ_p.a: > unknown symbol `___ieee_divdc3' > ghc-iserv-prof: Could not on-demand load symbol '_vectorScan' > > ghc-iserv-prof: > lookupSymbol failed in relocateSection (relocate external) > /Users/dom/Dropbox/Private/Stochastic/demo/.cabal-sandbox/lib/x86_64-osx-ghc-8.0.1/hmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ/libHShmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ_p.a: > unknown symbol `_vectorScan' > ghc-iserv-prof: Could not on-demand load symbol > '_hmatrixzm0zi18zi0zi0zm7aYEqJARQEvKYNyM4UGAPZZ_InternalziVectorizzed_constantAux_closure' > > ghc-iserv-prof: > lookupSymbol failed in relocateSection (relocate external) > /Users/dom/Dropbox/Private/Stochastic/demo/.cabal-sandbox/lib/x86_64-osx-ghc-8.0.1/hmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ/libHShmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ_p.a: > unknown symbol > `_hmatrixzm0zi18zi0zi0zm7aYEqJARQEvKYNyM4UGAPZZ_InternalziVectorizzed_constantAux_closure' > ghc-iserv-prof: Could not on-demand load symbol > '_hmatrixzm0zi18zi0zi0zm7aYEqJARQEvKYNyM4UGAPZZ_InternalziMatrix_Matrix_con_info' > > ghc-iserv-prof: > lookupSymbol failed in relocateSection (relocate external) > /Users/dom/Dropbox/Private/Stochastic/demo/.cabal-sandbox/lib/x86_64-osx-ghc-8.0.1/hmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ/libHShmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ_p.a: > unknown symbol > `_hmatrixzm0zi18zi0zi0zm7aYEqJARQEvKYNyM4UGAPZZ_InternalziMatrix_Matrix_con_info' > ghc-iserv-prof: Could not on-demand load symbol > '_hmatrixzm0zi18zi0zi0zm7aYEqJARQEvKYNyM4UGAPZZ_InternalziElement_zgzl_info' > > ghc-iserv-prof: > lookupSymbol failed in relocateSection (relocate external) > /Users/dom/Dropbox/Private/Stochastic/demo/.cabal-sandbox/lib/x86_64-osx-ghc-8.0.1/hmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ/libHShmatrix-0.18.0.0-7aYEqJARQEvKYNyM4UGAPZ_p.a: > unknown symbol > `_hmatrixzm0zi18zi0zi0zm7aYEqJARQEvKYNyM4UGAPZZ_InternalziElement_zgzl_info' > ghc-iserv-prof: Could not on-demand load symbol > '_hmatrixzm0zi18zi0zi0zm7aYEqJARQEvKYNyM4UGAPZZ_InternalziUtil_zdfIndexableVectorDouble_closure' > > > ByteCodeLink.lookupCE > During interactive linking, GHCi couldn't find the following symbol: > > hmatrixzm0zi18zi0zi0zm7aYEqJARQEvKYNyM4UGAPZZ_InternalziUtil_zdfIndexableVectorDouble_closure > This may be due to you not asking GHCi to load extra object files, > archives or DLLs needed by your current session. Restart GHCi, specifying > the missing library using the -L/path/to/object/dir and -lmissinglibname > flags, or simply by naming the relevant files on the GHCi command line. > Alternatively, this link failure might indicate a bug in GHCi. > If you suspect the latter, please send a bug report to: > glasgow-haskell-b...@haskell.org Dominic Steinitz domi...@steinitz.org http://idontgetoutmuch.wordpress.com _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/glasgow-haskell-users
