On Thu, Aug 30, 2007 at 08:33:37AM +0100, Simon Marlow wrote:
Tomasz Zielonka wrote:
Hello!
Consider:
$ cat R.hs main = return [()]
$ runghc R.hs [()]
This was a bit surprising for me, because I thought that runghc
mimics the way a compiled program behaves.
This doesn't happen with 6.6.1
Hello!
Consider:
$ cat R.hs
main = return [()]
$ runghc R.hs
[()]
This was a bit surprising for me, because I thought that runghc
mimics the way a compiled program behaves.
Best regards
Tomek
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On Tue, Jul 03, 2007 at 09:28:35AM +0100, Simon Peyton-Jones wrote:
We have just instituted a cheap-and-cheerful mechanism for voting.
Each bug has a 'cc' field. To vote, just add your email address to
the cc field!
How should we separate email addresses?
Right now people use different
Hello!
I've got such a compilation error on code that was accepted by an
earlier GHC:
Expr/Names.hs:19:66:
GADT pattern match in non-rigid context for `TypeInt'
Tell GHC HQ if you'd like this to unify the context
In the pattern: TypeInt
In the pattern:
On Fri, Apr 27, 2007 at 03:22:26PM +0100, Frederik Eaton wrote:
I like the new printing behaviour for (a1), but not for (b1). How do I
bind a variable to the result of an IO action without printing that
variable?
It seems that the value is not printed when there are more than one
pattern
On Thu, Sep 28, 2006 at 12:42:50PM +0100, Ian Lynagh wrote:
On Thu, Sep 28, 2006 at 09:07:33AM +0200, Tomasz Zielonka wrote:
Great! Which snapshot can I use to test this change?
Tonight's or later - there isn't one yet.
As I wrote in another message to glasgow-haskell-bugs, there are some
On Fri, Sep 29, 2006 at 12:30:10PM +0100, Simon Marlow wrote:
Tomasz Zielonka wrote:
Some recent GHC snapshot files seem to be broken.
Yes, this is due to a long-standing problem with our firewalls that
sometimes cause corruption of an SSH connection. I'll try to make it retry
or delete
On Fri, Sep 29, 2006 at 11:00:25AM +0200, Tomasz Zielonka wrote:
I will compile GHC from sources now.
The stats seem to be OK now.
Thanks!
Best regards
Tomasz
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On Thu, Sep 28, 2006 at 01:57:18AM +0100, Ian Lynagh wrote:
I've found a machine which had the same problem. I think I've fixed it with
Thu Sep 28 00:46:30 BST 2006 Ian Lynagh [EMAIL PROTECTED]
* Handle clock_gettime failing
Great! Which snapshot can I use to test this change?
Best
Hello!
Some recent GHC snapshot files seem to be broken.
For example with
http://www.haskell.org/ghc/dist/current/dist/ghc-6.5.20060927-i386-unknown-linux.tar.bz2
I get:
$ tar jxf ghc-6.5.20060927-i386-unknown-linux.tar.bz2
bzip2: Compressed file ends unexpectedly;
perhaps it is
On Wed, Sep 27, 2006 at 09:25:39AM +0100, Simon Marlow wrote:
Perhaps clock_gettime() is returning strange results on your system. Could
you try compiling with -threaded -debug, and run the program under gdb.
When I compile with -threaded -debug, the stats are OK :-/
Best regards
Tomasz
On Wed, Sep 27, 2006 at 12:06:34PM +0100, Simon Marlow wrote:
When I compile with -threaded -debug, the stats are OK :-/
Ok, maybe try strace?
Nothing suspicious, at least for me. Strace logs attached.
I'll try to compile GHC from sources and put some debugging
prints in the RTS. There
Hello!
I am getting nonsensical execution statistics (+RTS -Sstderr) when
running programs in SMP mode (+RTS -N2).
Example:
Task 0 (worker) : MUT time: 401572821.14s ( 21.89s elapsed)
GC time: 0.00s ( 0.00s elapsed)
Task 1 (worker) : MUT time: 296.00s (
On Thu, Aug 24, 2006 at 01:12:32AM +0100, Frederik Eaton wrote:
Do you think that the standard GHC behavior should be for
multithreaded programs to produce garbage on stderr?
IIUC, even if you switch to LineBuffering on stderr, you'll still get
garbage, only less often and in more subtle ways,
On Tue, Dec 27, 2005 at 08:12:20PM +0100, Christian Maeder wrote:
Already the following bit exhibits unexpected memory consumption:
main = mapM_ print $ take (n * 5) $ drop (n * 3) [1..]
n = 10
Dropping the elements is more expensive than printing them. Somehow the
dropped elements
On Sat, Dec 17, 2005 at 05:26:33PM +0100, Tomasz Zielonka wrote:
Are you sure it is really more efficient?
I remember that I was amazed that GHC compiled my
(sequence_ $ repeat $ ...) code to a really tight loop
with no allocations.
Hmmm... perhaps no allocations is not surprising
On Sat, Dec 17, 2005 at 03:58:19PM -, GHC wrote:
#638: Patch to make Control.Monad.replicateM_ faster
--+-
Reporter: ekarttun@cs.helsinki.fi | Owner:
Type: task |
On Fri, Dec 02, 2005 at 11:20:54AM -, Simon Marlow wrote:
If anyone is interested, this turned out to be a bug in the Network.BSD
module, namely that getHostByName isn't thread safe because it is based
on the C library function gethostbyname(), which returns data in a
single static area.
On Fri, Dec 02, 2005 at 12:39:25PM -, Simon Marlow wrote:
Do I understand correctly that another workaround is
- don't compile your programs with -threaded
?
No, the bug isn't related to -threaded. It still occurs without
-threaded.
Let's check that now I understand - so the
On 9/22/05, Simon Marlow [EMAIL PROTECTED] wrote:
On 22 September 2005 10:05, Christian Maeder wrote: The error message on this is really poor: parse error on input `length' An addition like expecting '(' might be more helpful.
Not easy to do - some significant work on Happy would be required
On Fri, Aug 12, 2005 at 07:43:56AM -0700, John Meacham wrote:
Hmm, care to give some details as to why you equate can with
always will on all platforms?
Yes. this is guarenteed behavior on pretty much every system. A whole
lot of things would break if it were otherwise. if select says a
On Mon, May 23, 2005 at 09:38:58AM +0100, Simon Peyton-Jones wrote:
This fromJust bug is SourceForge 1177320.
The trouble is that we've been unable to reproduce it here. It seems to
show up when compiling some large thing, like Darcs or WASH.
If anyone would be willing to snapshot a tree
Hello!
When I compile the following module with ghc -W -c A.hs I see several
unnecessary warning messages:
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.4
$ ghc -no-recomp -W -c A.hs
no location info: Warning: Defined but not used: `k'
no location info: Warning:
On Wed, Mar 09, 2005 at 10:01:40AM -0800, Frederik Eaton wrote:
On Wed, Mar 09, 2005 at 05:19:18PM -, Simon Marlow wrote:
On 09 March 2005 08:29, Frederik Eaton wrote:
Oh, is that the only reason? That's a terrible reason to not have a
feature. :) You could just write a 'ghcbug' script
On Wed, Mar 09, 2005 at 11:55:11AM -0800, Frederik Eaton wrote:
I am still not convinced that it is a good idea to add such
functionality to GHC. Do you want to persuade developers of
every program you use to add similar feature?
Is the perceived difficulty of that task an argument
On Wed, Mar 09, 2005 at 01:12:49PM -0800, Frederik Eaton wrote:
Are you volunteering to be that person? ;-)
Are you saying that a patch would be accepted?
I am not the one to decide.
Best regards
Tomasz
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Hello,
This happens in GHC 6.2.2:
Prelude let lf $$$ lx = zipWith ($) lf lx
Prelude :i $$$
-- $$$ is a variable, defined at interactive:1
($$$) :: forall b b. [b - b] - [b] - [b]
Prelude :t ($$$)
($$$) :: forall b b1. [b1 - b] - [b1] - [b]
Note the difference in types presented by :info and
On Mon, Jun 28, 2004 at 12:07:32PM +0100, Simon Marlow wrote:
Thanks for a superb bug report.
This bug appears to be another incarnation of a bug that has been fixed
since 6.2.1. I used the 6.2.1 compiler but linked the program against
the latest runtime on the 6.2 branch, which is identical
On Mon, Jun 28, 2004 at 01:38:42PM +0200, Tomasz Zielonka wrote:
On Mon, Jun 28, 2004 at 12:07:32PM +0100, Simon Marlow wrote:
So you can either wait for 6.2.2 (shouldn't be too long), use a nightly
snapshot of the 6.2 branch, or build from source. Or if you have an
existing 6.2.1 build
Hello!
The attached program uses no unsafe operations and yet it segfaults from
time to time. Try it on some file of moderate size, like:
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.2.1
$ ghc -O --make Bug -o Bug
Chasing modules from: Bug
Compiling Main
On Fri, Feb 06, 2004 at 11:13:57AM +, Malcolm Wallace wrote:
* -fglasgow-exts makes perfectly reasonable Haskell'98 code
invalid, throws up a totally misleading error unrelated to the
cause of the problem, and gives no clue as to what particular
extension is
On Thu, Dec 18, 2003 at 09:53:50PM +0100, Tomasz Zielonka wrote:
On Thu, Dec 18, 2003 at 07:44:58PM +0100, George Russell wrote:
It seems to work when I change hGetBuf to hGetBufNonBlocking. The name
is a bit misleading - the action _does_ wait for some data, but it doesn't
wait for all
On Fri, Dec 19, 2003 at 10:26:02AM -, Simon Marlow wrote:
On Thu, Dec 18, 2003 at 09:53:50PM +0100, Tomasz Zielonka wrote:
On Thu, Dec 18, 2003 at 07:44:58PM +0100, George Russell wrote:
It seems to work when I change hGetBuf to
hGetBufNonBlocking. The name
is a bit
On Fri, Dec 19, 2003 at 11:39:28AM +0100, Tomasz Zielonka wrote:
Well, I think that it would be better if hGetBuf didn't block if all
requested data was already in buffer, but I don't insist on it. However
this change of semantics can brake existing programs.
I am mixing things again
On Thu, Dec 18, 2003 at 07:44:58PM +0100, George Russell wrote:
(b) The server module only gets part of the data. In fact for me it comes
to a stop
with
[239][240][241][242][243Iterating
despite there being more data to come. (And despite the fact that the
client has
done hFlush).
On Fri, Jun 06, 2003 at 08:00:00PM +1000, Bernard James POPE wrote:
Hi all,
I seem to remember reading about this before, but I can't
find it, so I'm sorry if I'm repeating a known bug report.
It seems that -fglasgow-exts has trouble with (##) as an
operator:
module Main where
f
Hi!
On Thu, Jan 23, 2003 at 10:28:13AM -, Simon Peyton-Jones wrote:
To get around it, define your own data type:
data MyPr = MyPr (forall a.a-a) (forall a.a-a)
swap1 :: MyPr - MyPr
I played a bit with using highed order polymorphism for this problem,
and have encountered
Hello!
GHC nicely asked me to report the bug, so here it goes :)
Compiling this code in GHC 5.04.1 and 5.04.2
{-# OPTIONS -fglasgow-exts #-}
module Bug where
type T a = Int - (# Int, Int #)
f :: T a - T a
f t = \x - case t x of r - r
brings the following error message:
Hi!
In GHC 5.04.2 this fails: wordsPS (packString a)
Cause: typical off-by-one error in libraries/base/Data/PackedString.hs
line 289
first_pos_that_satisfies pred ps len n =
case [ m | m - [n..len], pred (ps ! m) ] of
^
here
Probably
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