Posted as #10303. Comments welcome. On Apr 13, 2015, at 7:57 AM, Simon Peyton Jones <simo...@microsoft.com> wrote:
> | I see you've added a reference buried in Debugging/Compiler. Why don't > | we just make traceStack the default? Perhaps with a flag to disable > | (or enable) the stack trace. > > Sounds desirable to me. It'll only work with profiling, though, of course. > > Would someone like to do this? At least make a ticket? > > Simon > > | -----Original Message----- > | From: ghc-devs [mailto:ghc-devs-boun...@haskell.org] On Behalf Of Simon > | Marlow > | Sent: 11 April 2015 21:27 > | To: Richard Eisenberg; ghc-devs@haskell.org Devs > | Subject: Re: stack traces when debugging GHC > | > | On 09/02/2015 02:51, Richard Eisenberg wrote: > | > Hi devs, > | > > | > I've just made a miraculous discovery and I want to share! > | > > | > It has happened many times that I create some bizarre error in GHC > | and have no clue where it comes from. In the past, I've ended up using > | pprTrace to label all calls of the failing function, sometimes > | recursively, until I get an idea of what's going on. This is terribly > | painful. And then, I noticed that the function Debug.Trace.traceStack > | (just in the `base` package, not part of GHC) will print out a stack > | trace, when profiling is enabled. So, I tried building a profiled build > | of GHC, with -DDEBUG and -fprof-auto (just by editing the "prof" > | section of build.mk). > | > > | > And then, voila, ASSERTs now print stack traces! And, with a small > | change in Outputable, I can get pprTrace to print stack traces, too! > | Hooray! > | > | I should have advertised this more widely, thanks for pointing it out. > | > | > I'd love to put this on the wiki. Any clue where this might be found? > | > | I see you've added a reference buried in Debugging/Compiler. Why don't > | we just make traceStack the default? Perhaps with a flag to disable > | (or > | enable) the stack trace. > | > | Cheers, > | Simon > | _______________________________________________ > | ghc-devs mailing list > | ghc-devs@haskell.org > | http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs > _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs