Re: [GHC] #930: ghc-6.6: panic! (the 'impossible' happened) mkWWcpr: not a product GHC-Brian-6.5.1:IdInfo.IdInfo{tc rfD}
#930: ghc-6.6: panic! (the 'impossible' happened) mkWWcpr: not a product GHC-
Brian-6.5.1:IdInfo.IdInfo{tc rfD}
-+--
Reporter: briansmith | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler|Version: 6.5
Severity: normal | Resolution:
Keywords: | Os: Unknown
Difficulty: Unknown | Architecture: Unknown
-+--
Comment (by simonpj):
Yes, I confirm that's correct. The problem only shows up with --make.
Simon
--
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/930
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Re: [GHC] #934: Allow load to work correctly when executed multiple times the same session for BatchCompile
#934: Allow load to work correctly when executed multiple times the same session for BatchCompile --+- Reporter: briansmith | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler |Version: 6.4.2 Severity: normal | Resolution: Keywords: | Os: Unknown Difficulty: Unknown | Architecture: Unknown --+- Comment (by simonmar): The idea seems reasonable to me, I don't envisage any problems with this generalisation other than the small cost of calling checkStability, which is probably insignificant. The patch doesn't exactly correspond to your code above; I like the above code better.Maybe replace those underscores with `_any` to make them stand out more. We haven't thought about stability for JustTypecheck mode, I suspect we're doing too much re-typechecking there. If you submit a production patch we'll apply. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/934 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #935: Minor documentation bug, odd defn of fibn.
#935: Minor documentation bug, odd defn of fibn. --+- Reporter: tmcooper |Owner: Type: bug| Status: closed Priority: normal |Milestone: Component: Documentation | Version: 6.6 Severity: minor | Resolution: fixed Keywords: | Difficulty: Easy (1 hr) Architecture: Multiple | Os: Multiple --+- Changes (by simonmar): * resolution: = fixed * status: new = closed Old description: On this page: http://haskell.org/ghc/docs/6.6/html/users_guide/lang- parallel.html the function fibn is defined. I assume fibn is meant to give the fibonacci sequence, but it doesn't. The problem is the term 'n1 + n2 + 1' in the function definition. It should be just 'n1 + n2'. This change needs to be made in two places on this page, and additionally, an occurence of 'n2 + n1 + 1' needs to be changed to 'n2 + n1'. In case it is helpful, here is the corrected html. !DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN http://www.w3.org/TR/html4/loose.dtd; htmlheadmeta http-equiv=Content-Type content=text/html; charset =ISO-8859-1title7.15. Parallel Haskell/titlelink rel=stylesheet href=lang-parallel_files/fptools.css type=text/cssmeta name=generator content=DocBook XSL Stylesheets V1.68.1link rel=start href=http://haskell.org/ghc/docs/6.6/html/users_guide/index.html; title=The Glorious Glasgow Haskell Compilation System User's Guide, Version 6.6link rel=up href=http://haskell.org/ghc/docs/6.6/html/users_guide/ghc-language- features.html title=Chapter 7. GHC Language Featureslink rel=prev href=http://haskell.org/ghc/docs/6.6/html/users_guide/monomorphism.html; title=7.14. Control over monomorphismlink rel=next href=http://haskell.org/ghc/docs/6.6/html/users_guide/ffi.html; title=Chapter 8. Foreign function interface (FFI) /head body alink=#ff bgcolor=white link=#ff text=black vlink=#840084div class=navheadertable summary=Navigation header width=100%tbodytrth colspan=3 align=center7.15. Parallel Haskell/th/trtrtd align=left width=20%a accesskey=p href=http://haskell.org/ghc/docs/6.6/html/users_guide/monomorphism.html;Prev/a /tdth align=center width=60%Chapter 7. GHC Language Features/thtd align=right width=20% a accesskey=n href=http://haskell.org/ghc/docs/6.6/html/users_guide/ffi.html;Next/a/td/tr/tbody/tablehr/divdiv class=sect1 lang=endiv class=titlepagedivdivh2 class=title style=clear: both;a name=lang- parallel/a7.15. Parallel Haskell/h2/div/div/diva class=indexterm name=id3181622/apThere are two implementations of Parallel Haskell: SMP paralellism a class=indexterm name=id3181636/a which is built-in to GHC (see a href=http://haskell.org/ghc/docs/6.6/html/users_guide/sec-using- smp.html title=4.12. Using SMP parallelismSection 4.12, #8220;Using SMP parallelism#8221;/a) and supports running Parallel Haskell programs on a single multiprocessor machine, and Glasgow Parallel Haskella class=indexterm name=id3181653/a (GPH) which supports running Parallel Haskell programs on both clusters of machines or single multiprocessors. GPH is developed and distributed separately from GHC (see a href=http://www.cee.hw.ac.uk/%7Edsg/gph/; target=_topThe GPH Page/a)./ppOrdinary single-threaded Haskell programs will not benefit from enabling SMP parallelism alone. You must expose parallelism to the compiler in one of the following two ways./pdiv class=sect2 lang=endiv class=titlepagedivdivh3 class=titlea name=id3181681/a7.15.1. Running Concurrent Haskell programs in parallel/h3/div/div/divpThe first possibility is to use concurrent threads to structure your program, and make sure that you spread computation amongst the threads. The runtime will schedule the running Haskell threads among the available OS threads, running as many in parallel as you specified with the code class=option-N/code RTS option./p/divdiv class=sect2 lang=endiv class=titlepagedivdivh3 class=titlea name=id3181704/a7.15.2. Annotating pure code for parallelism/h3/div/div/divpThe simplest mechanism for extracting parallelism from pure code is to use the code class=literalpar/code combinator, which is closely related to (and often used with) code class=literalseq/code. Both of these are available from a href=http://haskell.org/ghc/docs/6.6/html/libraries/base/Control- Parallel.html target=_topcode class=literalControl.Parallel/code/a:/ppre class=programlistinginfixr 0 `par` infixr 1 `seq` par :: a -gt; b -gt; b seq :: a -gt; b -gt; b/prepThe expression code class=literal(x `par` y)/code span class=emphasisemsparks/em/span the evaluation of code
Re: [GHC] #631: GHCi doesn't work unregisterised
#631: GHCi doesn't work unregisterised +--- Reporter: [EMAIL PROTECTED] |Owner: igloo Type: bug | Status: new Priority: low |Milestone: Component: GHCi | Version: 6.4.1 Severity: minor| Resolution: Keywords: | Difficulty: Unknown Architecture: Multiple | Os: Multiple +--- Comment (by igloo): The failures turn out to mostly be FFI-related. Might be worth investigating [ticket:793] before looking further at this. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/631 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #935: Minor documentation bug, odd defn of fibn.
#935: Minor documentation bug, odd defn of fibn.
--+-
Reporter: tmcooper |Owner:
Type: bug| Status: reopened
Priority: normal |Milestone:
Component: Documentation | Version: 6.6
Severity: minor | Resolution:
Keywords: | Difficulty: Easy (1 hr)
Architecture: Multiple | Os: Multiple
--+-
Changes (by [EMAIL PROTECTED]):
* resolution: fixed =
* status: closed = reopened
Comment:
Actually, the page was correct previously. The standard benchmarking
function 'nfib', called indeed notorious in the nofib suite, is
{{{
nfib n = if n = 1 then 1 else nfib (n-1) + nfib (n-2) + 1
}}}
It does not compute the Fibonacci numbers! It computes the number of
reductions required in a program that would compute the fibonacci
numbers. Subtle difference. But this is the standard historical
benchmark.
--
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/935
GHC http://www.haskell.org/ghc/
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Re: [GHC] #935: Minor documentation bug, odd defn of fibn.
#935: Minor documentation bug, odd defn of fibn. --+- Reporter: tmcooper |Owner: Type: bug| Status: closed Priority: normal |Milestone: Component: Documentation | Version: 6.6 Severity: minor | Resolution: fixed Keywords: | Difficulty: Easy (1 hr) Architecture: Multiple | Os: Multiple --+- Changes (by simonmar): * resolution: = fixed * status: reopened = closed -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/935 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #68: Warnings for unitialized fields
#68: Warnings for unitialized fields +--- Reporter: nobody |Owner: nobody Type: feature request | Status: assigned Priority: normal |Milestone: _|_ Component: Compiler | Version: None Severity: minor| Resolution: None Keywords: warnings | Difficulty: Easy (1 hr) Architecture: Unknown | Os: Unknown +--- Changes (by igloo): * architecture: = Unknown * difficulty: = Easy (1 hr) * milestone: = _|_ * keywords: = warnings * os: = Unknown -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/68 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #95: GHCi editor binding with :e
#95: GHCi editor binding with :e +--- Reporter: martijnislief|Owner: nobody Type: feature request | Status: assigned Priority: normal |Milestone: 6.6.1 Component: GHCi | Version: None Severity: minor| Resolution: None Keywords: | Difficulty: Easy (1 hr) Architecture: Unknown | Os: Unknown +--- Changes (by igloo): * component: None = GHCi * milestone: = 6.6.1 -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/95 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #149: missed CSE opportunity
#149: missed CSE opportunity
--+-
Reporter: nobody |Owner: nobody
Type: bug| Status: assigned
Priority: low|Milestone: _|_
Component: Compiler | Version: 5.04.2
Severity: normal | Resolution: None
Keywords: optimisations | Difficulty: Unknown
Architecture: Unknown| Os: Unknown
--+-
Changes (by igloo):
* architecture: = Unknown
* difficulty: = Unknown
* milestone: = _|_
* keywords: = optimisations
* os: = Unknown
Old description:
{{{
Don't know if this is a bug, but it was at least
_surprising_ to find that
playerMostOccur [a] = a
playerMostOccur (x:xs)| numOccur x (x:xs)
numOccur
(playerMostOccur xs) xs
= x
| otherwise =
playerMostOccur xs
was exponentially slower when compiled with ghc-5.04.2
-O than:
playerMostOccur [a] = a
playerMostOccur (x:xs)| numOccur x (x:xs)
numOccur pmo xs
= x
| otherwise = pmo
where pmo =
playerMostOccur xs
Although the student responsible for the code couldn't
spot the
obvious optimisation, I was expecting that GHC's
optimiser would. :)
If it's not a bug, could you explain it to me?
-Greg(gregm.at.cs.uwa.edu.au)
}}}
New description:
{{{
Don't know if this is a bug, but it was at least
_surprising_ to find that
playerMostOccur [a] = a
playerMostOccur (x:xs)| numOccur x (x:xs)
numOccur
(playerMostOccur xs) xs
= x
| otherwise =
playerMostOccur xs
was exponentially slower when compiled with ghc-5.04.2
-O than:
playerMostOccur [a] = a
playerMostOccur (x:xs)| numOccur x (x:xs)
numOccur pmo xs
= x
| otherwise = pmo
where pmo =
playerMostOccur xs
Although the student responsible for the code couldn't
spot the
obvious optimisation, I was expecting that GHC's
optimiser would. :)
If it's not a bug, could you explain it to me?
-Greg(gregm.at.cs.uwa.edu.au)
}}}
--
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/149
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Re: [GHC] #149: missed CSE opportunity
#149: missed CSE opportunity --+- Reporter: nobody |Owner: nobody Type: bug| Status: assigned Priority: low|Milestone: 6.8 Component: Compiler | Version: 5.04.2 Severity: normal | Resolution: None Keywords: optimisations | Difficulty: Unknown Architecture: Unknown| Os: Unknown --+- Changes (by igloo): * milestone: _|_ = 6.8 Comment: This seems to work in 6.4.1, but not in the HEAD as of a few days ago, so it's probably worth at least looking to see what's going on. I've added a test (simplrun006) to the testsuite. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/149 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
[GHC] #936: strange ghci behavior and error with recursive modules
#936: strange ghci behavior and error with recursive modules
--+-
Reporter: Misha Aizatulin [EMAIL PROTECTED] | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: GHCi |Version: 6.4.2
Severity: normal | Keywords:
Difficulty: Unknown | Architecture: Unknown
Os: Linux|
--+-
Here is a ghci session with the attached program:
{{{
ghci B
___ ___ _
/ _ \ /\ /\/ __(_)
/ /_\// /_/ / / | | GHC Interactive, version 6.4.2, for Haskell 98.
/ /_\\/ __ / /___| | http://www.haskell.org/ghc/
\/\/ /_/\/|_| Type :? for help.
Loading package base-1.0 ... linking ... done.
Compiling C[boot] ( ./C.hs-boot, ./C.o-boot )
Compiling A( ./A.hs, interpreted )
Compiling B( B.hs, interpreted )
Compiling C( ./C.hs, interpreted )
Ok, modules loaded: C, B, A, C.
*C :r
Ok, modules loaded: A, C, B.
*A :m + B
*A B A
During interactive linking, GHCi couldn't find the following symbol:
B_zdfClass1B_closure
This may be due to you not asking GHCi to load extra object files,
archives or DLLs needed by your current session. Restart GHCi, specifying
the missing library using the -L/path/to/object/dir and -lmissinglibname
flags, or simply by naming the relevant files on the GHCi command line.
Alternatively, this link failure might indicate a bug in GHCi.
If you suspect the latter, please send a bug report to:
glasgow-haskell-bugs@haskell.org
*A B B
B
*A B A
A
}}}
3 strange things happen:
1. I ask to load B, it loads C
2. I ask to reload, it loads A :)
3. missing symbol error which goes away after evaluating some other
expression
--
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/936
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