Newer versions of clang raise a warning when compiling the TestInvocation class because it is not declared as final and does not have a virtual destructor.
Created attachment 337710 [details] Patch
rdar://problem/39328648
Created attachment 337727 [details] Patch for landing
Comment on attachment 337727 [details] Patch for landing Clearing flags on attachment: 337727 Committed r230545: <https://trac.webkit.org/changeset/230545>
All reviewed patches have been landed. Closing bug.