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Wizards: Fix crash

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... if the project has no classes.
Apparently, one must not call QFutureInterface::reportsResults() with an
empty list, so prevent that.
Also, for simplicity, make sure we have only one possible point of
deletion for the watcher.

Change-Id: I68c3813459533ced86610e88bea81b6a9d170ca5
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
This commit is contained in:
Christian Kandeler
2020-08-05 16:33:12 +02:00
parent 6c4c7ec751
commit 1f72edcda9
1 changed files with 5 additions and 3 deletions
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8
src/plugins/projectexplorer/jsonwizard/jsonfieldpage.cpp
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@@ -632,7 +632,7 @@ void LineEditField::setupCompletion(FancyLineEdit *lineEdit)
if (!classesFilter)
return;
classesFilter->prepareSearch({});
const auto watcher = new QFutureWatcher<LocatorFilterEntry>(lineEdit);
const auto watcher = new QFutureWatcher<LocatorFilterEntry>;
const auto handleResults = [this, lineEdit, watcher](int firstIndex, int endIndex) {
QSet<QString> namespaces;
QStringList classes;
@@ -681,13 +681,15 @@ void LineEditField::setupCompletion(FancyLineEdit *lineEdit)
}
completionList.sort();
lineEdit->setSpecialCompleter(new QCompleter(completionList, lineEdit));
watcher->deleteLater();
};
QObject::connect(watcher, &QFutureWatcher<LocatorFilterEntry>::resultsReadyAt, lineEdit,
handleResults);
QObject::connect(watcher, &QFutureWatcher<LocatorFilterEntry>::finished,
watcher, &QFutureWatcher<LocatorFilterEntry>::deleteLater);
watcher->setFuture(runAsync([classesFilter](QFutureInterface<LocatorFilterEntry> &f) {
const QList<LocatorFilterEntry> matches = classesFilter->matchesFor(f, {});
f.reportResults(QVector<LocatorFilterEntry>(matches.cbegin(), matches.cend()));
if (!matches.isEmpty())
f.reportResults(QVector<LocatorFilterEntry>(matches.cbegin(), matches.cend()));
f.reportFinished();
}));
}