Seg Fault when upgrading Steppes Theme

[Peter Bennett]

When upgrading to Steppes theme 2.40, mythfrontend fails with a seg fault. After restart it is ok.

[Peter Bennett]

back trace of core dump

[jpoet]

The gdb.txt file is not clear about where the segfault occurred. I am guessing it happened in libfreetype.

I replaced most of the fonts with a different face, in this version of the theme, and I bet it didn't handle having the the fonts it was using disappear out from under it.

[Peter Bennett]

Relevant part of back trace

[Peter Bennett]

The seg fault occurs in QT code from a call to QFontMetrics::elidedText. This is called in line 555 of mythuitext.cpp

    if (m_Cutdown != Qt::ElideNone)
    {
        QFontMetrics fm(GetFontProperties()->face());
        QString cut_line = fm.elidedText
                           (paragraph.mid(last_line),
                            Qt::ElideRight,
                            width - fm.averageCharWidth());

I checked all the parameters to elidedText and all seem valid.

There may be a corrupted font being returned by face(). This may be something other than simply the font changing, because it does not happen on changing to a new theme. I would think that changing theme would often result in using new fonts, and this does not normally cause seg faults.

[Stuart Auchterlonie]

We have moved all bug tracking to github [1]

If you continue to have this issue, please open a new issue at github, referencing this ticket.

[1] - ​https://github.com/MythTV/mythtv/issues