Crash with empty message box upon SVG font selection in font editor windows

[Benoit Lefèvre]

The version to use to reproduce this crash : Inkscape 0.92.1 r15371 (windows version)

How to reproduce :

1) open the file I've added in attachment to this bug report
2) open SVG font edition window, if it's not already open
3) select the "font 1" entry in this window

=> This scenario lead to the opening of an empty message box, and closing it have Inkscape crashing.

I didn't looked for more informations like stack traces or dumps but I can do it on demand if someone is willing to remind me best practices when doing so. I'm a dev too, but I'm also a bit rusted when it's all about tracking crash reasons on windows platforms ;)

Please, also notice that initially I named the font I'm working on "JuJu" or something alike. I don't remember when during my work session this name I gave turned into "font 1", but as Inkscape crashed upon the selection of this "inadvertently renamed" font, I guess it must be part of the problem and thus is worth mentioning it.

You can get in touch with me via my email if you have further questions.

[Benoit Lefèvre (mumeii)]

I've edited the svg file to recover most of my data : the bug disappear when i get ride of the only hkern entry i've managed to add before having my initial work session crashing :

<svg ...>
  ...
  <defs id="defs4">
    ...
    <font horiz-adv-x="1024" id="font7788" inkscape:label="fonte 1">
      ...
      <hkern u1="j" u2="u" k="0" id="hkern7838" />

Thus maybe the file I've attached is ill conceived as it's been created during a session crash.

Nevertheless The initial crash I've experienced and that lead me to find the auto saved file in my user directory was the same than the one i've experienced subsequently when I tried to click on "font 1" after opening the auto save file.