#10218 is fully fixed, so are we good on this one now? Simon | -----Original Message----- | From: ghc-devs [mailto:ghc-devs-bounces@haskell.org] On Behalf Of | Richard Eisenberg | Sent: 01 April 2015 17:52 | To: Yongqian Li | Cc: ghc-devs@haskell.org | Subject: Re: Bug: GHC creates incorrect code which throws <<loop>> | | Thanks for posting the bug and bringing it to our attention. The reason | the report may not have gotten attention is that I believe this falls | in Simon PJ's domain, and he's on holiday right now. I took a quick | look, but I haven't a clue about this area of GHC, so there's not much | I can contribute. Unless someone else out there knows much about black- | holing, you may have to wait a bit. Sorry! | | Richard | | On Mar 31, 2015, at 9:48 PM, Yongqian Li | wrote: | | > Hi all, | > | > I wanted to bring to your attention this bug, | > https://ghc.haskell.org/trac/ghc/ticket/10218 , which I filed about | > two days ago but hasn't gotten any replies to yet. | > | > | > In my opinion, this is a rather serious bug since GHC is producing | > incorrect code. While there is a workaround, it makes my program take | > about 2 hours to compile. | > | > | > Since reporting the bug, I've also seen "strange closure type" | > exceptions, which I believe are also caused by this bug, although I | do | > not have a test case. Based on my limited understanding of GHC | > internals, I suspect the problem lies in how type class dictionaries | > are looked up at run time, as the problem disappears if GHC can fully | > resolve the types. | > | > | > Can others see if they can reproduce this bug? If there is any way I | > can help, please let me know. | > | > | > Sincerely, | > Yongqian Li | > _______________________________________________ | > 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

Yes, looks good. I haven't had a chance to test it yet though. On Thu, Apr 23, 2015 at 1:10 AM, Simon Peyton Jones wrote:

#10218 is fully fixed, so are we good on this one now?

Simon

| -----Original Message----- | From: ghc-devs [mailto:ghc-devs-bounces@haskell.org] On Behalf Of | Richard Eisenberg | Sent: 01 April 2015 17:52 | To: Yongqian Li | Cc: ghc-devs@haskell.org | Subject: Re: Bug: GHC creates incorrect code which throws <<loop>> | | Thanks for posting the bug and bringing it to our attention. The reason | the report may not have gotten attention is that I believe this falls | in Simon PJ's domain, and he's on holiday right now. I took a quick | look, but I haven't a clue about this area of GHC, so there's not much | I can contribute. Unless someone else out there knows much about black- | holing, you may have to wait a bit. Sorry! | | Richard | | On Mar 31, 2015, at 9:48 PM, Yongqian Li | wrote: | | > Hi all, | > | > I wanted to bring to your attention this bug, | > https://ghc.haskell.org/trac/ghc/ticket/10218 , which I filed about | > two days ago but hasn't gotten any replies to yet. | > | > | > In my opinion, this is a rather serious bug since GHC is producing | > incorrect code. While there is a workaround, it makes my program take | > about 2 hours to compile. | > | > | > Since reporting the bug, I've also seen "strange closure type" | > exceptions, which I believe are also caused by this bug, although I | do | > not have a test case. Based on my limited understanding of GHC | > internals, I suspect the problem lies in how type class dictionaries | > are looked up at run time, as the problem disappears if GHC can fully | > resolve the types. | > | > | > Can others see if they can reproduce this bug? If there is any way I | > can help, please let me know. | > | > | > Sincerely, | > Yongqian Li | > _______________________________________________ | > 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