[squeak-dev] Re: [Vm-dev] Bug 956376 ??? Can not edit class comments

Frank Shearar frank.shearar at gmail.com
Fri Apr 26 14:20:23 UTC 2013


I have not seen this error in any of Ubuntu 10.10, Windows, OS X
(whatever version I have - 10.4? 10.6?) or CentOS, with any of the
Cog, CogMT, Interpreter VMs. But I _don't_ have an Ubuntu 13.04
machine.

frank

On 26 April 2013 14:55, David T. Lewis <lewis at mail.msen.com> wrote:
> Frank,
>
> Can you please clarify if this is a bug that has been observed with any of
> the *existing* pre-compiled VMs obtained from either http://squeakvm.org/unix/
> or from http://www.mirandabanda.org/files/Cog/VM/?
>
> Adding a workaround to one spot in the image may be the wrong thing to do.
> It would mask a serious problem that could lead to data corruption for
> anyone who relies on storing data in files.
>
> I am traveling and will not be able to follow up on this mail for a while,
> but please - if this is a gcc optimizer problem, as has been suggested
> elsewhere in the discussion, then let's not "fix" it in the image.
>
> Dave
>
>
> On Fri, Apr 26, 2013 at 01:52:55PM +0100, Frank Shearar wrote:
>> Agreed. It's more complicated than it sounds, of course: the proper
>> fix is to push out new updated binaries to ftp.squeak.org.
>>
>> frank
>>
>> On 26 April 2013 13:17, Pavel Krivanek <squeak1 at continentalbrno.cz> wrote:
>> > Please submit then info to redhat bugzilla about where Jaroslav can find the
>> > fixed 4.3 image to repack it.
>> >
>> > -- Pavel
>> >
>> >
>> > On Fri, Apr 26, 2013 at 12:17 PM, Frank Shearar <frank.shearar at gmail.com>
>> > wrote:
>> >>
>> >> On 25 April 2013 15:35, Frank Shearar <frank.shearar at gmail.com> wrote:
>> >> > On 25 April 2013 13:54, David T. Lewis <lewis at mail.msen.com> wrote:
>> >> >>
>> >> >> On Thu, Apr 25, 2013 at 02:18:22PM +0200, Bert Freudenberg wrote:
>> >> >>>
>> >> >>> This didn't sound like a VM problem at first, but according to the
>> >> >>> discussion it is:
>> >> >>>
>> >> >>> https://bugzilla.redhat.com/show_bug.cgi?id=956376
>> >> >>>
>> >> >>> Any idea?
>> >> >>>
>> >> >>
>> >> >> On my 64-bit Linux with an interpreter VM compiled in 64-bit, and using
>> >> >> Squeak - no problem. With a 32-bit interpreter - no problem. With Cog -
>> >> >> again, no problem.
>> >> >>
>> >> >> I edited the class comment for class Array in each case.
>> >> >>
>> >> >> Dave
>> >> >
>> >> > "Error: RemoteString past end of file" can indicate a broken/damages
>> >> > changes file.
>> >> >
>> >> > It does when I get the error, at least. Usually that happens when I
>> >> > have to hard-kill an image that's stored state in the changes file.
>> >> > Restarting the image means there's a mismatch somehow in the state
>> >> > between the image and the changes file. Once you get one of these
>> >> > you're nearly completely hosed: you can't file things out, for
>> >> > instance.
>> >>
>> >> For those not following the Pharo list, it looks like the root cause
>> >> is that the glibc in Ubuntu 13.04 doesn't immediately write new
>> >> content out to the file. Thus you can "write" to the file, and then
>> >> read from the file, only your RemoteString starts off the end of the
>> >> file. The fix is to make WriteStream >> #nextPutChunk: call "self
>> >> flush". I've pushed a 4.5 fix to trunk, but have not yet done the same
>> >> for the 4.4 and 4.3 update streams.
>> >>
>> >> frank
>> >>
>> >
>> >
>> >
>> >
>


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