The following layout test is flaky on GTK+ Linux 64 bit Release: platform/gtk/editing/pasteboard/middle-button-paste.html
This test started to timeout regularly since: r261560 TEXT (Expected: PASS FAIL) [r261561-r261571] UNKNOWN r261572 TIMEOUT PASS FAIL (Expected: PASS FAIL) [r261573-r261579] UNKNOWN r261580 TEXT (Expected: PASS FAIL) [r261581-r261591] UNKNOWN r261592 PASS (Expected: PASS FAIL) r261593 UNKNOWN r261594 TIMEOUT PASS FAIL (Expected: PASS FAIL) [r261595-r261597] UNKNOWN r261598 TIMEOUT PASS FAIL (Expected: PASS FAIL) [r261599-r261602] UNKNOWN r261603 TIMEOUT PASS FAIL (Expected: PASS FAIL) Judging the intervals before the first timeout failures, I think the timeout may have to do with the refactorizations in the clipboard for adapting to GTK4 (r261554 or r261555).
I can't reproduce this.
This test(s) has been consistenly passing in the last 4000 revisions. Closing bug.