Crash removing Format

[Kornel Benko]

Am Mon, 6 Jul 2020 11:58:30 -0400
schrieb Richard Kimberly Heck <rikiheck at lyx.org>:

> On 7/6/20 4:50 AM, Kornel Benko wrote:
> > Am Sun, 5 Jul 2020 20:14:27 -0400
> > schrieb Richard Kimberly Heck <rikiheck at lyx.org>:
> >
> >> On 7/5/20 8:12 PM, Richard Kimberly Heck wrote:
> >>> On 6/24/20 11:06 AM, Richard Kimberly Heck wrote:  
> >>>> On 6/24/20 6:19 AM, Kornel Benko wrote:  
> >>>>> Am Tue, 23 Jun 2020 22:01:03 -0400
> >>>>> schrieb Scott Kostyshak <skostysh at lyx.org>:
> >>>>>  
> >>>>>> On Mon, Jun 22, 2020 at 04:55:50PM +0200, Kornel Benko wrote:  
> >>>>>>> Am Mon, 22 Jun 2020 10:24:17 -0400
> >>>>>>> schrieb Richard Kimberly Heck <rikiheck at lyx.org>:
> >>>>>>>     
> >>>>>>>> On 6/22/20 10:03 AM, Kornel Benko wrote:    
> >>>>>>>>> Following lead to crash:
> >>>>>>>>>
> >>>>>>>>> 	1. Create new file-Format (for instance Epub, define a viewer)
> >>>>>>>>> 	2. define conversion for docbook-xls -> Epub
> >>>>>>>>> 	3. restart lyx
> >>>>>>>>> 	4. remove the new conversion
> >>>>>>>>> 	5. remove the format Epub --> crash
> >>>>>>>>>
> >>>>>>>>> There is no crash if
> >>>>>>>>> 	5. restart lyx
> >>>>>>>>> 	6. remove the format Epub      
> >>>>>>>> I can't reproduce.    
> >>>>>>> You probably need to recompile with "-D_GLIBCXX_DEBUG_PEDANTIC -D_GLIBCXX_DEBUG"
> >>>>>>>     
> >>>>>>>> Can you post your preferences file as it exists after
> >>>>>>>> (3)?    
> >>>>>>>     
> >>>>>>>> Do you save or apply after (4) or go right to step (5)?    
> >>>>>>> Apply only. But with save it is the same.    
> >>>>>> I can reproduce. In addition I get the following:
> >>>>>>
> >>>>>>   Error: attempt to subscript container with out-of-bounds index 21973, but 
> >>>>>>   container only holds 99 elements.
> >>>>>>
> >>>>>> Scott  
> >>>>> Here the message is:
> >>>>> /usr/include/c++/8/debug/vector:417:
> >>>>> Error: attempt to subscript container with out-of-bounds index 1899910496, 
> >>>>> but container only holds 98 elements.
> >>>>>
> >>>>> Objects involved in the operation:
> >>>>>     sequence "this" @ 0x0x555f98a58bc8 {
> >>>>>       type = std::__debug::vector<lyx::Graph::Vertex,
> >>>>> std::allocator<lyx::Graph::Vertex>  
> >>>>>> ; }  
> >>>>> Abort (core dumped)
> >>>>>
> >>>>> If using attached, I got no crash, but the list of indexes used while removing the
> >>>>> format is scarifying.
> >>>>>
> >>>>>  $ wc errors
> >>>>>  1014  5060 35805 errors
> >>>>>
> >>>>>  $ sort my_list | uniq
> >>>>> Graph.cpp (145): VERT-INDEX == 0
> >>>>> Graph.cpp (145): VERT-INDEX == 11
> >>>>> Graph.cpp (145): VERT-INDEX == 21972
> >>>>> Graph.cpp (145): VERT-INDEX == 24
> >>>>> Graph.cpp (145): VERT-INDEX == 32
> >>>>> Graph.cpp (145): VERT-INDEX == 32757
> >>>>> Graph.cpp (145): VERT-INDEX == 33
> >>>>> Graph.cpp (145): VERT-INDEX == 71
> >>>>> Graph.cpp (145): VERT-INDEX == 79
> >>>>> Graph.cpp (145): VERT-INDEX == 8
> >>>>> Graph.cpp (145): VERT-INDEX == 80
> >>>>> Graph.cpp (145): VERT-INDEX == 83
> >>>>>
> >>>>>  $ egrep 21972 my_list | wc
> >>>>>     377    1885   13949
> >>>>>
> >>>>>  $ egrep 32757 my_list | wc
> >>>>>     134     670    4958  
> >>>> I will have a look.  
> >>> I was able to reproduce with the cmake setting mentioned above, but now
> >>> I can't again. I have not been able to reproduce without those settings,
> >>> nor do I see the weird values. But something is obviously suspicious.
> >>>
> >>> When I did see the crash, it was coming from Converters::isReachable().
> >>> You could try something like the attached, which could yield more
> >>> information.  
> >> Sorry, changed wrong routine. Try this patch.
> >>
> >> Riki
> >>
> >>
> > To achieve the settings with gnu c++ compiler do:
> > with cmake: -DLYX_STDLIB_DEBUG=ON
> > with automake: --enable_stdlib_debug=yes
> 
> I still can't get it to crash.
> 
> Attached are the cmake settings I'm using. (This is generated by QtCreator.)
> 
> Riki
> 
> 

Looks good.

Step1 create forma epub and converter docbook5 -> epub

 $ egrep -i epub preferences
\format "" "epub" "Epub" "" "" "" "" ""
\converter "docbook5" "" "dbtoepub  -o $$o $$i" ""

Restart lyx
remove converter docbook5 -> epub
Apply!
remove format epub
Apply! --> crash

 $ egrep -i epub preferences
\format "" "epub" "Epub" "" "" "" "" ""

The converter is gone, but the format still exists


	Kornel
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