I was wondering what was pulling in Java 6, and libreoffice seems to be the culprit. Looking at upstream's website, Java 7 should be compatible. "Support for Java 7 (1.7) added. User can select between Java 6 or 7 engine, if both are installed": https://www.libreoffice.org/download/3-5-new-features-and-fixes/ "IIRC Stephan committed this to libreoffice-3-4 for 3.4.5 - so marking fixed again :-)": https://bugs.freedesktop.org/show_bug.cgi?id=39659#c46
Fixed in main tree. Thanks for the report.