Re: new crash on leaving a message

[Jack <ostroffjh users sourceforge net>]

On 2016.08.23 08:42, Peter Bloomfield wrote:
> Hi Jack!
>
> On 08/22/2016 06:52:59 PM Mon, Jack wrote:
> > On 2016.08.22 13:06, Jack wrote:
> > > I have a message I just received, which I have no trouble viewing,  
> > > but as soon as I leave the message (deleting, selecting another  
> > > message, selecting another mailbox) balsa crashes.  Strace ends  
> > > with:
> ...
> > > write(2, "\n(balsa:19050): gtkhtml-CRITICAL"..., 98
> > > (balsa:19050): gtkhtml-CRITICAL **: html_engine_unrealize:  
> > > assertion 'HTML_IS_ENGINE (e)' failed
> ...
> > > Balsa is compiled from git, gtk3 branch, with gtkmthm 4.10.0.  I  
> > > suppose I'll reinstall webkit-gtk, but that's a long compile, and  
> > > I'm leaving on vacation tomorrow, so I doubt I can troubleshoot  
> > > much before I get home.  I was able to manually edit the mbox file,  
> > > and move the bad message to its own file, so I can keep working.
> > >
> > > The odd thing about the message is that it's rather short, with
> > > Content-Type: text/html; charset=utf-8
> > > Content-Transfer-Encoding: base64
> > > and the unencoded content being essentially "<p>message about a  
> > > successful bill payment</p>" where the message is only one line,  
> > > 118 characters, with no non-printable or other strange characters.
> > >
> > > I can try downgrading gtkhtml from 4.10.0 to 4.8.5 to see if it  
> > > matters, but I just don't understand why the crash is on leaving  
> > > the message, not on displaying it.  By the way, "display source"  
> > > works fine, and closing the source window is also OK.  Not sure  
> > > what else I can try, in terms of debugging.
> > >
> > > As always, thanks for any suggestions.
> > >
> > > Jack
> > Well, it turns out this is not new.  Google led me back to this  
> > mailing list in August, 2011.  Ildar reported the issue, and Peter's  
> > response was "Yes, I see the same thing.  It seems to happen when  
> > when clearing the display after showing an HTML message part to show  
> > something else, and it seems to happen only for certain HTML parts,  
> > not all, but predictably for the vulnerable parts." and suggested it  
> > was a gtkhtml4 bug.  Well, I have a short example - where should I  
> > file it?  Even if the entire HTML snippet is <p>.....</p> which may  
> > not be legal html, it shouldn't just crash.  Unfortunately, I'm  
> > leaving for vacation tomorrow, so I don't have enough time to switch  
> > back to webkit until I return.
>
> I just configured Balsa with html-widget = gtkhtml4 for the first  
> time in a while. It just doesn't work well! Scrolling a message that  
> needs scrolling made the text disappear in a flash, and I had the  
> same crash on selecting a non-html message. We must be using the  
> widget incorrectly, but I'm not sure how.
As you said in 2011, the crash seems to be on deselecting or leaving  
the HTML message (probably only if some type of invalid HTML) rather  
than depending on what you are supposed to display next.  I also did  
see that flashing issue a few times yesterday.  Bits of the message  
appear briefly, and then disappear again.  Very disconcerting.

(I managed to recompile for now using gtk-webkit2 since I have it  
installed.  I'll be monitoring email while I'm on vacation, but will  
likely not have any way to test, unless I can configure in a VM on my  
laptop.)
> Has anyone had success with a gtkhtml4 build?