[GHC] #2555: Template Haskell does not respect -package and -hide constraints
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[GHC] #2555: Template Haskell does not respect -package and -hide constraints
by GHC-2
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#2555: Template Haskell does not respect -package and -hide constraints
------------------------+--------------------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 6.8.2 | Severity: normal Keywords: | Testcase: Architecture: Unknown | Os: Linux ------------------------+--------------------------------------------------- (I am using 6.8.2-2ubuntu1, packaged for Ubuntu Hardy Heron, on amd64.) Recently sjanssen added some patches to the Lambdabot darcs repository which replace a preprocessor, BotPP, with some Template Haskell. This seems to work well, however I ran into a problem with it - everytime TH was called, it would error out with a message about Bytestring 0.9.1.0. This is far from the first time I've run into this problem, but it was not fixed by forcibly removing 0.9.1.0 & recompiling affected packages against bytestring 09.0.1! After even more debugging, I finally figured it out: The module TH was erroring out on has an 'import Text.Regex'. Text.Regex is installed by the regex-compat package. I had two regex-compats installed. regex-compat-0.91 was linked against bytestring0.9.0.1. regex- compat-0.92 was linked against (the removed) bytestring-0.9.1.0. Now, normally Cabal detects that using 0.92 would lead to errors, and it selects 0.91, and it adds to the GHC options '-hide-all-package -package regex-compat-0.91', and everything compiles fine and the user is happy. But! in this case, Template Haskell ignores the flags, and it uses the most recent regex-compat. And it is this that breaks the build. I ultimately resolved this issue by removing regex-compat-0.92 and reinstalling and linking it against 0.9.0.1, although I fear this may yet lead to bugs in the future. Short summary: Cabal is smarter than TH and picks better package versions to compile against, and yet TH ignores Cabal's picks. This leads to unnecessary & difficult to figure out compile failures. -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2555> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@... http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs |
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Re: [GHC] #2555: Template Haskell does not respect -package and -hide constraints
by GHC-2
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#2555: Template Haskell does not respect -package and -hide constraints
-------------------------+-------------------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 6.8.2 Severity: normal | Resolution: Keywords: | Testcase: Architecture: Unknown | Os: Linux -------------------------+-------------------------------------------------- Changes (by guest): * cc: gwern0@... (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2555#comment:1> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@... http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs |
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Re: [GHC] #2555: Template Haskell does not respect -package and -hide constraints
by GHC-2
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#2555: Template Haskell does not respect -package and -hide constraints
----------------------+----------------------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Milestone: 6.10 branch Component: Compiler | Version: 6.8.2 Severity: normal | Resolution: Keywords: | Difficulty: Unknown Testcase: | Architecture: Unknown Os: Linux | ----------------------+----------------------------------------------------- Changes (by igloo): * difficulty: => Unknown * milestone: => 6.10 branch -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2555#comment:2> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@... http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs |
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Re: [GHC] #2555: Template Haskell does not respect -package and -hide constraints
by GHC-2
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#2555: Template Haskell does not respect -package and -hide constraints
----------------------+----------------------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Milestone: 6.10 branch Component: Compiler | Version: 6.8.2 Severity: normal | Resolution: Keywords: | Difficulty: Unknown Testcase: | Architecture: Unknown Os: Linux | ----------------------+----------------------------------------------------- Comment (by simonpj): Simon and I discussed this, and we can't understand enough about the problem to see what is going on. So we need a way to reproduce it. Can you give us some code, and a recipe for making it happen? Simon -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2555#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@... http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs |
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Re: [GHC] #2555: Template Haskell does not respect -package and -hide constraints
by GHC-2
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#2555: Template Haskell does not respect -package and -hide constraints
----------------------+----------------------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Milestone: 6.10 branch Component: Compiler | Version: 6.8.2 Severity: normal | Resolution: Keywords: | Difficulty: Unknown Testcase: | Architecture: Unknown Os: Linux | ----------------------+----------------------------------------------------- Comment (by guest): I think I described it thoroughly; reproducing it requires carefully installing a package or two, and I'm not going to risk screwing up my installation yet again. -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2555#comment:4> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@... http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs |
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Re: [GHC] #2555: Template Haskell does not respect -package and -hide constraints
by GHC-2
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#2555: Template Haskell does not respect -package and -hide constraints
----------------------+----------------------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Milestone: 6.12 branch Component: Compiler | Version: 6.8.2 Severity: normal | Resolution: Keywords: | Difficulty: Unknown Testcase: | Architecture: Unknown Os: Linux | ----------------------+----------------------------------------------------- Changes (by simonpj): * milestone: 6.10 branch => 6.12 branch Comment: OK. If you come across it again, please let us know and we'll take the opportunity to get more specific info. Meanwhile, we're stuck. Simon -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2555#comment:5> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@... http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs |
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Re: [GHC] #2555: Template Haskell does not respect -package and -hide constraints
by GHC-2
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#2555: Template Haskell does not respect -package and -hide constraints
-------------------------------+-------------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Milestone: 6.12 branch Component: Template Haskell | Version: 6.8.2 Resolution: | Keywords: Difficulty: Unknown | Os: Linux Testcase: | Architecture: Unknown/Multiple Failure: None/Unknown | -------------------------------+-------------------------------------------- Changes (by duncan): * failure: => None/Unknown Comment: Replying to [comment:6 simonmar]: > We don't dispute there's a bug here, but it can't be as simple as just "TH ignores the package flags". My current guess is that stale .hi files refer to another version of a package, so despite what the -package flags say we pull in two versions of a package when TH runs. That said, this should only happen if there are multiple versions of a package in the package graph. So perhaps this doesn't explain what gwern reported. -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2555#comment:8> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@... http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs |
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