On Fri, Apr 26, 2013 at 12:44:49PM +0200, Igor Stasenko wrote:

On 26 April 2013 10:27, Pavel Krivanek pavel.krivanek@gmail.com wrote:

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The reason is in the optimalizations in the latest glibc. It really does not write the new content to the changes file immediately. We need to call flush at the end of nextChunkPut:

This is nasty one. What i worry that it affects much more than code working with .changes file.

Indeed, I expect that a bug like this would effect *anything* that involves writing to a positionable file.

It's not clear to me from the discussion if this is a bug in the runtime C library, or in the gcc optimizer (sic). Is it the case that a pre-compiled VM that works properly on one Linux platform will have this bug if run on another Linux platform that has a different runtime clib? Or is it the case that a VM compiled from source on one platform behaves differently than the same VM compiled from source on a different Linux platform?

Dave

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Cheers, -- Pavel

On Fri, Apr 26, 2013 at 9:57 AM, GOUBIER Thierry thierry.goubier@cea.fr wrote:

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Reproduced on Ubuntu 13.04.

Class organization remoteString filePositionHi is past the end of the changes file (i.e. exactly equal to the file size if the comment is the last operation).

Thierry ________________________________ De : pharo-project-bounces@lists.gforge.inria.fr [pharo-project-bounces@lists.gforge.inria.fr] de la part de Pavel Krivanek [pavel.krivanek@gmail.com] Date d'envoi : jeudi 25 avril 2013 21:32 ?? : Pharo-project@lists.gforge.inria.fr Objet : Re: [Pharo-project] cannot modify class comments on Linux

Jaroslav wrote this: This does work on F17, but it doesn't work on F18, F19. Maybe glibc issue? I guess the reproducer needs glibc-2.16 and up, IMHO 12.04 has 2.15 same as F17, so I guess this would be also reproducible on Ubuntu 13.04.

-- Pavel

On Thu, Apr 25, 2013 at 11:16 AM, Gisela Decuzzi giseladecuzzi@gmail.com wrote:

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I'm on 64-bit Ubuntu 12.04

2013/4/25 Pavel Krivanek pavel.krivanek@gmail.com

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Hi,

what architecture and distro do you use because I tried it on a 32-bit Debian and it worked. I'm on 64-bit Fedora 18. That may be the reason why the tests are not failing on CI. This error appears on all old system classes and on newely created classes too. Some next info: https://bugzilla.redhat.com/show_bug.cgi?id=956376

-- Pavel

On Thu, Apr 25, 2013 at 10:58 AM, Gisela Decuzzi giseladecuzzi@gmail.com wrote:

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Hi Pavel, I tried in Pharo 2.0 and 3.0 and it work well for me. (just try in a random class comment) Are you trying to modify a particular class comment?

2013/4/25 Pavel Krivanek pavel.krivanek@gmail.com > > Hi, > > if you will try to modify a class comment on Linux, the error > "RemoteString past end of file" will appear. On windows VM it seems to work > well. Can someone confirm this behavior on Linux. Squeak has the same > problem. > > Cheers, > -- Pavel

-- Best regards, Igor Stasenko.