11:13 a.m.
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Summary: ghci does not handle backspace correctly
https://bugzilla.redhat.com/show_bug.cgi?id=478466
Summary: ghci does not handle backspace correctly
Product: Fedora
Version: rawhide
Platform: i386
OS/Version: Linux
Status: NEW
Severity: medium
Priority: low
Component: ghc
AssignedTo: bos(a)serpentine.com
ReportedBy: greenrd(a)greenrd.org
QAContact: extras-qa(a)fedoraproject.org
CC: petersen(a)redhat.com, bos(a)serpentine.com,
loupgaroublond(a)gmail.com,
fedora-haskell-list(a)redhat.com
Classification: Fedora
Description of problem:
ghci does not handle the backspace key correctly.
Presumably this is because ghc is not (according to ldd) linked with either
readline or editline.
Version-Release number of selected component (if applicable):
ghc-6.10.1-6.fc11.i386
How reproducible:
Always
Steps to Reproduce:
1. ghci
2. Type something
3. Press backspace
Actual results:
^? appears
Expected results:
character deleted
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1:34 p.m.
New subject: [Fedora-haskell-list] [Bug 478466] ghci does not handle backspace correctly
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https://bugzilla.redhat.com/show_bug.cgi?id=478466
--- Comment #1 from Bryan O'Sullivan <bos(a)serpentine.com> 2008-12-30 14:34:42
EDT ---
I've no idea what's wrong here. I saw the same problem building ghc via koji on
x86_64, but it has since vanished with Jens's most recent build. If I use mock
to do a build on my laptop, the problem doesn't occur either. It's clearly
somehow related to the koji build environment, but it is strenuously resisting
debugging.
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1:34 p.m.
New subject: [Fedora-haskell-list] [Bug 478466] ghci does not handle backspace correctly
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Bryan O'Sullivan <bos(a)serpentine.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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8:29 p.m.
New subject: [Fedora-haskell-list] [Bug 478466] ghci does not handle backspace correctly
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--- Comment #2 from Jens Petersen <petersen(a)redhat.com> 2009-01-05 21:29:11 EDT
---
Hmm, I still see the problem with ghc-6.10.1-6.fc11.i386 here. I don't think I
have seen readline or editline working yet with ghci in 6.10.1.
I got the impression that it is an upstream issue since I heard someone else
mention it with another distro on irc, but it sounds like certain build
environments may trigger it? I agree with Robin that it is strange that ghc is
not linked to the line editing lib.
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8:37 p.m.
New subject: [Fedora-haskell-list] [Bug 478466] ghci does not handle backspace correctly
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--- Comment #3 from Jens Petersen <petersen(a)redhat.com> 2009-01-05 21:37:23 EDT
---
Looking at
http://kojipkgs.fedoraproject.org/packages/ghc/6.10.1/6.fc11/data/logs/i3...
I see some build errors related to the editline package but I don't if that
relates to this. I remember even trying to build with readline locally did not
help with this problem.
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7:22 p.m.
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Conrad Meyer <konrad(a)tylerc.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |konrad(a)tylerc.org
--- Comment #4 from Conrad Meyer <konrad(a)tylerc.org> 2009-01-12 20:22:15 EDT ---
I'm hitting this bug too (ghc-6.10.1-6.fc11.x86_64).
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8:52 p.m.
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ChrisKalt <chris(a)netpos.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |chris(a)netpos.com
--- Comment #5 from ChrisKalt <chris(a)netpos.com> 2009-01-17 21:52:17 EDT ---
I'm also seeing this problem. I just compiled GHCi version 6.10.1 using Fedora
8. fwiw/ The previous GHCi version 6.6.1 does not have the problem.
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9:02 p.m.
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--- Comment #6 from Conrad Meyer <konrad(a)tylerc.org> 2009-01-17 22:02:58 EDT ---
Chris: F-9 had 6.8.3 I believe and also did not have this issue. GHC moved from
GNU readline to the BSD replacement library, editline, between 6.8.x and 6.10.x
(someone correct me if I am wrong here). This seems to be the source of the
problem.
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4:27 p.m.
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--- Comment #7 from ChrisKalt <chris(a)netpos.com> 2009-01-18 17:27:17 EDT ---
Conrad: You are correct about 6.8.3 on F-9. I just tried building GHC 6.10.1 on
my laptop which has F-9, not unsurprisingly GHCi backspace is broken there as
well. I'm still quite new to Haskell so a tad hesitant to roll up my sleeves
enough to dig in there to fix this. Incidentally, my desire to move to 6.10 was
prompted by the fact that I cannot build Takusen in any of the earlier
releases. In an email exchange I had from Alistair Bayley last week he said
he's currently working on the 6.10 build. So for now I'm sort of dead in the
water awaiting community assistance on two issues. Since most my work in
Haskell would target Databases and I really wanted to focus on using Takusen. (
I really am excited about Haskell however my optimism over how soon I could
become productive is somewhat dampened if these sorts of problems in seemingly
key components are so common. )
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4:36 p.m.
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--- Comment #8 from Conrad Meyer <konrad(a)tylerc.org> 2009-01-18 17:36:12 EDT ---
We just need to get ghc to start linking with editline (I don't know whether
that's an upstream bug or something wrong in our build).
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5:21 p.m.
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--- Comment #9 from Robin Green <greenrd(a)greenrd.org> 2009-01-18 18:21:13 EDT ---
The workaround I'm using for the time being is:
1. Install haskell-mode into emacs
2. Run emacs
3. Open a Haskell source file
4. From the Haskell menu choose "Start interpreter"
You now have ghci running inside emacs and can edit lines. The history works
differently - to recall a previous line, you click on it with the mouse.
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5:01 a.m.
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Jens Petersen <petersen(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |MODIFIED
--- Comment #10 from Jens Petersen <petersen(a)redhat.com> 2009-01-19 06:01:29 EDT
---
Turns out buildrequiring ncurses-devel helps to get the ghc editline package
built and ghci line-editting is back.
Should be fixed in ghc-6.10.1-7.fc11 building now in rawhide. I think we can
push it to f10-updates soon.
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5:19 a.m.
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--- Comment #11 from Conrad Meyer <konrad(a)tylerc.org> 2009-01-19 06:19:57 EDT ---
That is great news, thanks.
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2:10 a.m.
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Jens Petersen <petersen(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|MODIFIED |CLOSED
Resolution| |RAWHIDE
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Jens Petersen <petersen(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |481252
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1:48 a.m.
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--- Comment #12 from Jens Petersen <petersen(a)redhat.com> 2009-01-23 02:48:24 EDT
---
Jeff Collie kindly finished libedit so building ghc-6.10.1-8.fc11.
Will wait for libedit f10 update to build new ghc for f10.
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--- Comment #13 from ChrisKalt <chris(a)netpos.com> 2009-01-28 20:50:06 EDT ---
(In reply to comment #10)
Turns out buildrequiring ncurses-devel helps to get the ghc editline
package
built and ghci line-editting is back.
Would you have a suggestion on how to accomplish this using Fedora 8 and
building with the ghc-6.10.1 source download? I'm not familiar with how to do
this. -- thanks for any advice.
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