[Octave-bug-tracker] [bug #53617] GUI exits with SIGABRT from failed qt_assert when running in Flatpak container environment

[Mike Miller]

Follow-up Comment #2, bug #53617 (project octave):

Hmm, the place in the Qt SQLite driver where this assertion failure occurs was
new in Qt 5.10, so any older Qt isn't affected.

My distribution is still on Qt 5.9.2, so now I don't know if this crash only
occurs in the flatpak environment, or it only occurs with Qt 5.10.1.

The Qt change and follow-up changes related to this:

https://code.qt.io/cgit/qt/qtbase.git/commit/?id=9076046a109cb8c60254314f7d29f7e044c5946f
https://code.qt.io/cgit/qt/qtbase.git/commit/?id=52b85212a2ec8ec5bf187f6cd00b669a45bcf0bd
https://code.qt.io/cgit/qt/qtbase.git/commit/?id=3e58f2b090661aab7302132cb2da661c8e227bc2

>From what I've been able to glean from gdb, the QHelpSearchEngine's search
index writer object is attempting to write a sqlite database with the
following


    query.prepare(QLatin1String("INSERT INTO info (namespace, attributes, url,
title, data) VALUES (?, ?, ?, ?, ?)"));
    query.addBindValue(m_namespaces);
    query.addBindValue(m_attributes);
    query.addBindValue(m_urls);
    query.addBindValue(m_titles);
    query.addBindValue(m_contents);
    query.execBatch();


where all of the bound values are empty (size==0) QVariantLists.

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