UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36

Steps to reproduce the problem:
1. Go to http://www.tu-chemnitz.de/~heha/enas/UDX5114N.zip/sm5.sch?as=SVG

What is the expected behavior?
Should display an interactive SVG image for a PCB CAD schematic. Like this URL:
http://www.tu-chemnitz.de/~heha/enas/STS%20Multiplex/MFC-Verteiler.zip/MFC4.sch?as=SVG

What went wrong?
Blank screen, no DOM tree, no error message, not traceable using built-in debugger/inspector

Did this work before? No 

Does this work in other browsers? Yes

Chrome version: 63.0.3239.108  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

See discussion here:
https://stackoverflow.com/questions/47836234

As Martin Honnen gave me the right hint to reproduce this behaviour using libxslt on a Linux command line, I saw that all schematics I have fall into two categories:
* Less complicated that will be processed by libxslt and default settings, AND will be displayed correctly in Chromium, and
* Such a schematic that will produce error message and no SVG output using xsltproc AND will be displayed as blank screen in Chromium

So the simple solution should be to increase variable buffer size when Chromium internally invokes xsltproc.