Crash opening svg contains invalid stylesheet rule with pseudo class

Summary:

Inkscape crashes if open a svg file containing syntactically ill-formed CSS rule with pseudo class:

<style>:a</style>

Steps to reproduce:

• open Inkscape
• open the attached svg

What happened?

Inkscape crashes

$ inkscape test.svg
Shortcut::read: invalid verb: DialogSpellcheck

Emergency save activated!
Emergency save completed. Inkscape will close now.
If you can reproduce this crash, please file a bug at https://inkscape.org/report
with a detailed description of the steps leading to the crash, so we can fix it.
Segmentation fault

traceback.txt

What should have happened?

No crash

Sample attachments:

test.svg

Version info

Inkscape 1.1.2 (1:1.1+202202050950+0a00cf5339)

    GLib version:     2.64.6
    GTK version:      3.24.20
    glibmm version:   2.64.2
    gtkmm version:    3.24.2
    libxml2 version:  2.9.10
    libxslt version:  1.1.34
    Cairo version:    1.16.0
    Pango version:    1.44.7
    HarfBuzz version: 2.6.4
    Poppler version:  0.86.1

    OS version:       Ubuntu 20.04.4 LTS