Looks like something related to the flatpak checks in the runner. This affects the bots, as they are in the process of migrating to Flatpak. Output: Undefined subroutine &Test262::Runner::setConfiguration called at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/Tools/Scripts/test262/Runner.pm line 631. Compilation failed in require at ./Tools/Scripts/test262-runner line 66. BEGIN failed--compilation aborted at ./Tools/Scripts/test262-runner line 66. program finished with exit code 25 elapsedTime=0.174489
Committed r260028: <https://trac.webkit.org/changeset/260028>
<rdar://problem/61725583>