It is just as the message says: you can't use pprTrace too early in the execution of a GHC program. It looks like you're trying to print something pretty simple, so why not try a plain old Debug.Trace trace?
Edward Excerpts from Omar Mefire's message of 2015-08-15 13:40:35 -0700: > Hi all,I'm trying to step through some ghc code.I am trying to use pprTrace ( > for the first time ) and I keep getting an error when I use it :I've added it > to the file ghc/Main.hs and the resulting code is this : > let argv1' = map (mkGeneralLocated "on the commandline") argv1 > (argv2, staticFlagWarnings) <- pprTrace "argv1 prime" (ppr argv1') $ > parseStaticFlags argv1' > I want to examine the value of argv1'. After my modification, I go into the > ghc/ folder and run : 'make'But doing this leads to an error when I try to > run the program : > ghc-stage2: panic! (the 'impossible' happened) (GHC version > 7.11.20150810 for x86_64-unknown-linux): Static flags have not been > initialised! Please call GHC.parseStaticFlags early enough. > What am I doing wrong ? Omar Mefire, _______________________________________________ ghc-devs mailing list [email protected] http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
