Seems that this is an inherent limitation of the gzip file format http://lists.gnu.org/archive/html/bug-gzip/2010-03/msg00009.html
I guess this should be closed as "not a bug"? I don't know how to do that however... -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to file-roller in Ubuntu. https://bugs.launchpad.net/bugs/1511232 Title: file-roller reports wrong content size for .gz file Status in file-roller package in Ubuntu: New Bug description: .gz file size is 5.1 GB (5,063,869,339 bytes) file-roller reports content size 3.9GB and compression ratio 0.77 after extracting, the actual file size is 54.9 GB (54,940,270,592 bytes) version and system info: file-roller 3.10.2.1-0ubuntu4.1 ubuntu 14.04.3 LTS Memory 3.9 GiB Processor AMD Athlon(tm) II X4 620 OS type 64-bit Steps to reproduce: go to: http://dumps.wikimedia.org/wikidatawiki/20151002/ download file: wikidatawiki-20151002-pages-logging.xml.gz (file with description "Log events to all pages and users.") open file with archive manager, it shows: wikidatawiki-20151002-pages-logging.xml 3.9 GB extract the file and check actual size: 54.9 GB To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/file-roller/+bug/1511232/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp