I can not print PDF reports.
If I choose too much information, It sues error
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Wkhtmltopdf failed (error code: -11). Memory limit too low or maximum file number of subprocess reached. Message : ml?page=550&section=&sitepage=550&title=&subsection=&frompage=1&subsubsection=&topage=551&doctitle=&sitepages=551&webpage=/tmp/report.body.tmp.HR4wfT.html&time=11:02 AM&date=12/14/17 (sometimes it will work just to ignore this error with --load-error-handling ignore)
Error: Failed loading page file:///tmp/report.header.tmp.B770te.html?page=551&section=&sitepage=551&title=&subsection=&frompage=1&subsubsection=&topage=551&doctitle=&sitepages=551&webpage=/tmp/report.body.tmp.HR4wfT.html&time=11:02 AM&date=12/14/17 (sometimes it will work just to ignore this error with --load-error-handling ignore)
Error: Failed loading page file:///tmp/report.footer.tmp.kJLwH6.html?page=551&section=&sitepage=551&title=&subsection=&frompage=1&subsubsection=&topage=551&doctitle=&sitepages=551&webpage=/tmp/report.body.tmp.HR4wfT.html&time=11:02 AM&date=12/14/17 (sometimes it will work just to ignore this error with --load-error-handling ignore)
QPaintDevice: Cannot destroy paint device that is being painted
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But when I choose data, print fewer reports. I can print the report.
How should I fix this?

Impacted versions: Odoo10
wkhtmltopdf --version
wkhtmltopdf 0.12.1 (with patched qt)