aacid added a comment.
This is the important part https://paste.kde.org/pldoxclam It tells you that you're trying to use Sidebar while it was already deleted. Problem is you did not compile with debug enabled and the log is not as useful as it could. Please add -DCMAKE_BUILD_TYPE=Debug to your cmake line and build again and you'll get line numbers which are much nicer. Paste the valgrind log again once you do that. REPOSITORY R223 Okular REVISION DETAIL https://phabricator.kde.org/D11051 To: dileepsankhla, #okular, aacid Cc: aacid, sander, #okular, michaelweghorn, ngraham