Code detecting existence of template doesn’t work

[flying-sheep]

I created a readable plain text file, selected it as template, but still the else branch is hit here:

ktikz/common/tikzpreviewgenerator.cpp

Lines 459 to 468 in 207af3e

	QFile templateFile(templateFileName);
	#ifdef KTIKZ_USE_KDE
	KFileItem templateFileItem(QUrl::fromLocalFile(templateFileName));
	if (templateFileItem.determineMimeType().parentMimeTypes().contains(QLatin1String("text/plain"))
	#else
	if (QFileInfo(templateFile).isFile()
	#endif
	&& templateFile.open(QIODevice::ReadOnly | QIODevice::Text) // if user-specified template file is readable
	&& !tikzReplaceText.isEmpty())
	{

If I output the mime list, I get just ("application/octet-stream"), while I also get

$ file --mime-type Dev/TeX/ktikz-context.pgs
Dev/TeX/ktikz-context.pgs: text/plain

I assume if the file itself has the text/plain mime already, its parents only contain application/octet-stream.