display of $int...$ under QT5

[Kornel Benko]

Am Fri, 28 Aug 2020 15:11:34 +0200
schrieb Kornel Benko <kornel at lyx.org>:

> Am Fri, 28 Aug 2020 14:38:54 +0200
> schrieb Pavel Sanda <sanda at lyx.org>:
> 
> > On Thu, Aug 27, 2020 at 09:48:27PM +0200, Kornel Benko wrote:
> > > > > Thanks Pavel. I was not aware that cmake installed the files in wrong directory.
> > > > > 
> > > > > Now, with the 'correct' dir, I see the same as the reporter.
> > > > > That is, our esint10.ttf _is_ the culprit ...    
> > > > 
> > > > This is interesting. What is your distro?  
> > > 
> > > Mint19.3, QT 5.9.5
> > >   
> > > > Even more interesting: do I understand correctly that it worked correctly
> > > > before it was installed into 'correct' directory??  
> > > 
> > > Yes. And I don't understand why. Maybe because of
> > > /usr/local/texlive/2020/texmf-dist/fonts/type1/public/esint-type1/esint10.pfb  
> > 
> > Are you sure you are not reporting results when instant preview is on?
> > If yes, then look only what happens inside math editor, once outside
> > the rendering is done by latex and is irrelevant to qt font problems.
> > 
> > Out of curiosity I removed esint10.ttf from my tree and no glyphs are
> > visible as one would expect.
> > 
> > Pavel
> 
> No change removing esint10.ttf.
> 
> strace lyx attached.
> 
> 	Kornel

For comparison the strace if I use your supplied file

	Kornel
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