#14510: GHC.ExecutionStack.showStackTrace broken ---------------------------------+-------------------------------------- Reporter: duog | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 (amd64) Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | ---------------------------------+-------------------------------------- Comment (by niteria): I've just tried with GHC HEAD and I get: {{{ $ ./testdwarf Stack trace: set_initial_registers (rts/Libdw.c:288.0) in /data/users/bnitka/ghc-14510/testdwarf dwfl_thread_getframes in get_one_thread_cb in /usr/lib64/libdw-0.168.so dwfl_getthreads in /usr/lib64/libdw-0.168.so dwfl_getthread_frames in /usr/lib64/libdw-0.168.so libdwGetBacktrace (rts/Libdw.c:259.0) in /data/users/bnitka/ghc-14510/testdwarf base_GHCziExecutionStackziInternal_collectStackTrace1_info (libraries/base/GHC/ExecutionStack/Internal.hsc:74.10) in /data/users/bnitka/ghc-14510/testdwarf base_GHCziExecutionStackziInternal_collectStackTrace1_info (libraries/base/GHC/ExecutionStack/Internal.hsc:74.10) in /data/users/bnitka/ghc-14510/testdwarf base_GHCziExecutionStack_showStackTrace1_info (libraries/base/GHC/ExecutionStack.hs:50.1) in /data/users/bnitka/ghc-14510/testdwarf base_GHCziBase_zdfMonadIO1_info (libraries/base/GHC/Base.hs:1389.1) in /data/users/bnitka/ghc-14510/testdwarf base_GHCziBase_zdfApplicativeIO2_info (libraries/base/GHC/Base.hs:1392.1) in /data/users/bnitka/ghc-14510/testdwarf stg_catch_frame_info (rts/Exception.cmm:372.1) in /data/users/bnitka/ghc-14510/testdwarf stg_stop_thread_info (rts/StgStartup.cmm:42.1) in /data/users/bnitka/ghc-14510/testdwarf StgRunIsImplementedInAssembler (rts/StgCRun.c:370.0) in /data/users/bnitka/ghc-14510/testdwarf scheduleWaitThread (rts/Schedule.c:453.0) in /data/users/bnitka/ghc-14510/testdwarf hs_main (rts/RtsMain.c:73.0) in /data/users/bnitka/ghc-14510/testdwarf in /data/users/bnitka/ghc-14510/testdwarf __libc_start_main in _start in /data/users/bnitka/ghc-14510/testdwarf }}} I had to modify it slightly for it to print anything: {{{ import GHC.ExecutionStack import Data.Maybe main :: IO () main = do putStrLn . fromMaybe "" =<< showStackTrace return () }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14510#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler