Re: new crash on leaving a message

[Jack <ostroffjh users sourceforge net>]

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:
>
> clock_gettime(CLOCK_MONOTONIC, {2378793, 752194449}) = 0
> recvmsg(7, 0x7ffe09ee81e0, 0)           = -1 EAGAIN (Resource  
> temporarily unavailable)
> poll([{fd=3, events=POLLIN}, {fd=7, events=POLLIN}, {fd=9,  
> events=POLLIN}, {fd=11, events=POLLIN}, {fd=13, events=POLLIN},  
> {fd=15, events=POLLIN}], 6, 0) = 0 (Timeout)
> write(6, "\1\0\0\0\0\0\0\0", 8)         = 8
> futex(0x8c9c10, FUTEX_WAKE_PRIVATE, 1)  = 1
> futex(0x8c6970, FUTEX_WAKE_PRIVATE, 1)  = 1
> futex(0x8bd058, FUTEX_WAKE_PRIVATE, 1)  = 1
> gettimeofday({1471884318, 459520}, NULL) = 0
> gettimeofday({1471884318, 460986}, NULL) = 0
> gettimeofday({1471884318, 461770}, NULL) = 0
> gettimeofday({1471884318, 462068}, NULL) = 0
> write(19, "\1\0\0\0\0\0\0\0", 8)        = 8
> futex(0x10b5400, FUTEX_WAKE_PRIVATE, 1) = 1
> futex(0x7fbb249fd638, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN  
> (Resource temporarily unavailable)
> futex(0x7fbb249fd638, FUTEX_WAKE_PRIVATE, 1) = 0
> write(2, "\n(balsa:19050): gtkhtml-CRITICAL"..., 98
> (balsa:19050): gtkhtml-CRITICAL **: html_engine_unrealize: assertion  
> 'HTML_IS_ENGINE (e)' failed
> ) = 98
> write(2, "\n(balsa:19050): Gtk-CRITICAL **:"..., 114
> (balsa:19050): Gtk-CRITICAL **: gtk_im_context_set_client_window:  
> assertion 'GTK_IS_IM_CONTEXT (context)' failed
> ) = 114
> --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x180} ---
> +++ killed by SIGSEGV +++
>
> The clock_gettime, recvmsg, poll, write, futex messages I see lots of  
> earlier in the trace.
>
> 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.

Jack