Crash removing Format

[Richard Kimberly Heck]

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


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