Crash while attempting to load rich text resource from an invalid scheme

import QtQuick

TextEdit {
    textDocument.source: "unsupportedResourceScheme.md"
}

# Images that you can't load

![alt text](gopher://qt.io/icon48.png "some sort of fictitious icon")

![alt text](gopher://qt.io/icon24.png "another to attempt loading in parallel")

void QQuickTextEdit::resourceRequestFinished()
{
    Q_D(QQuickTextEdit);
    bool allDone = true;
    for (auto it = d->pixmapsInProgress.cbegin(); it != d->pixmapsInProgress.cend();) {
        auto *job = *it;
        if (job->isError()) { // <-----
            // get QTextDocument::loadResource() to call QQuickTextEdit::loadResource() again, to return the placeholder
            qCDebug(lcTextEdit) << "failed to load" << job->url();
            d->document->resource(QTextDocument::ImageResource, job->url());
        } else if (job->isReady()) {
            // get QTextDocument::loadResource() to call QQuickTextEdit::loadResource() again, and cache the result
            auto res = d->document->resource(QTextDocument::ImageResource, job->url());
            // If QTextDocument::resource() returned a valid variant, it's been cached too. Either way, the job is done.
            qCDebug(lcTextEdit) << (res.isValid() ? "done downloading" : "failed to load") << job->url() << job->rect();
            delete *it;  // <------
            it = d->pixmapsInProgress.erase(it);
        } else {