The LegacyProfiler::{start,stop}Profiling methods try to handle a null exec, but then ignore the possibility of null later. We just exit early on a null exec now, on the basis that we would have crashed anyway had we not.
Created attachment 190127 [details] Patch
Comment on attachment 190127 [details] Patch Clearing flags on attachment: 190127 Committed r144026: <http://trac.webkit.org/changeset/144026>
All reviewed patches have been landed. Closing bug.