Noticing runtime error in socktools.cpp

[Scott Kostyshak]

On Tue, Oct 22, 2024 at 02:00:28PM GMT, Kornel Benko wrote:
> Am Tue, 22 Oct 2024 13:20:01 +0200
> schrieb Jean-Marc Lasgouttes <lasgouttes at lyx.org>:
> 
> > Le 22/10/2024 à 12:27, Scott Kostyshak a écrit :
> > > On Wed, Sep 18, 2024 at 10:06:58AM GMT, Kornel Benko wrote:  
> > >> Lyx compiled with -fsanitize=undefined gives this at start:
> > >>
> > >> /usr2/src/lyx/lyx-git/src/support/socktools.cpp:121:56: runtime error: member access
> > >> within null pointer of type 'struct sockaddr_un' #0 0x5570c33ba6c8 in
> > >> lyx::support::socktools::listen(lyx::support::FileName const&, int)
> > >> /usr2/src/lyx/lyx-git/src/support/socktools.cpp:121:56 #1 0x5570c1975907 in
> > >> lyx::ServerSocket::ServerSocket(lyx::support::FileName const&)
> > >> /usr2/src/lyx/lyx-git/src/ServerSocket.cpp:55:8 #2 0x5570c17fe5ee in
> > >> lyx::LyX::exec(int&, char**) /usr2/src/lyx/lyx-git/src/LyX.cpp:370:32 #3
> > >> 0x5570c1c6a4ba in main /usr2/src/lyx/lyx-git/src/main.cpp:55:26 #4 0x7f91a048bd8f in
> > >> __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16 #5
> > >> 0x7f91a048be3f in __libc_start_main csu/../csu/libc-start.c:392:3 #6 0x5570c112b154
> > >> in _start
> > >> (/usr9/BUILD/Mint21/BuildLyxGitQt6.2.4local-clang15.0.7/bin/lyx2.5+0x28fe154)
> > >> (BuildId: 518d7aff388c7943507dd4632cba39cb3ae876cb)
> > >>
> > >> SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
> > >> /usr2/src/lyx/lyx-git/src/support/socktools.cpp:121:56 in  
> > > 
> > > I have been wanting to try to reproduce this, but I always have to change a few
> > > things around so that compiling with -fsanitize=undefined works for me.  
> > 
> > I took a look at that, but this code is out of my breadth.
> > 
> > JMarc
> > 
> 
> It is not compilation which gives the error output. Start the debug-version of lyx from
> the build directory:
>  $ ./bin/lyx2.5 
> /usr2/src/lyx/lyx-git/src/support/socktools.cpp:121:56: runtime error: member access
> within null pointer of type 'struct sockaddr_un' SUMMARY: UndefinedBehaviorSanitizer:
> undefined-behavior /usr2/src/lyx/lyx-git/src/support/socktools.cpp:121:56 in 

I mean that when I turn on the debug build, it has a conflict with some
other flag that I usually set (I forget if external hunspell). I will
look into it.

Scott
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