inkscape crashed with segfault in ExpressionEvaluator on OpenBSD

[Rafael Sadowski]

Hello inscape developer team,

in OpenBSD we always run in "EvaluatorException("Invalid UTF8 string", NULL);" in src/util/expression-evaluator.cpp.
Inkscape::Ui::Widget::SpinButton call Inkscape::Util::ExpressionEvaluator(get_text().c_str() ... with an invalid UTF-8 string.

In OpenBSD we fix the problem with explicit convert the string to UTF-8. See below to attachment.
A complete error description you find here: https://marc.info/?l=openbsd-ports&m=145461812922697&w=2

I hope this patch will find the way in inkscape.

Best regards,

Rafael Sadowski

[jazzynico (jazzynico)]

Crash not reproduced on Windows XP, Inkscape 0.91 and trunk rev. 14666.

That said, the attached patch compiles correctly and local tests don't show obvious regressions.

@Raphael - Does the crash also occur when using other tools?

[Rafael Sadowski (rafael-g)]

No, it only crash in inkscape on OpenBSD (i386/amd64) (reported by me and other inkscape OpenBSD users).

[jazzynico (jazzynico)]

Fix tested on Xubuntu 16.04, and applied to the trunk rev. 14951.
Thanks for your patch, Rafael!

[Rafael Sadowski (rafael-g)]

Thanks for committing in trunk, jazzynico!