Created attachment 1336757 [details] Log messages Description of problem: When trying to upgrade to Fedora 27, during start-up of "dnf system-upgrade reboot" dnf encounters "*** Error in `/usr/libexec/system-python': free(): invalid pointer: 0x00007fca2abade20 ***" and fails, then reboots without attempting upgrade. Version-Release number of selected component (if applicable): Fedora 26 (4.13.4-200.fc26.x86_64) dnf-2.7.3-1.fc26 python3-3.6.2-8.fc26 python3-dnf-plugin-system-upgrade-2.0.3-1.fc26 python3-dnf-plugins-core-2.1.5-1.fc26 How reproducible: Consistently Steps to Reproduce: 1. sudo dnf upgrade --refresh 2. sudo dnf install dnf-plugin-system-upgrade 3. sudo dnf system-upgrade download --refresh --releasever=27 4. sudo dnf system-upgrade reboot Actual results: System is rebooted, boots to system upgrade screen and immediately fails. Expected results: Upgrade completes successfully. Additional info: Log attached.
*** This bug has been marked as a duplicate of bug 1498207 ***