As reported by -Wunused-lambda-capture diagnostic of Clang
Created attachment 307686 [details] Patch
Comment on attachment 307686 [details] Patch r=me
Comment on attachment 307686 [details] Patch Clearing flags on attachment: 307686 Committed r215601: <http://trac.webkit.org/changeset/215601>
All reviewed patches have been landed. Closing bug.
Nice! Have you considered always enabling the warning?
This warning a very new feature, it is enabled by -Wall, and if you have Clang newer than r291905 you will get it without enabling it specifically.