It's possible for our Contributor.Mapping class to end up with an invalid contributor, this can cause issues when attempting to iterate over all contributors. We should just skip invalid contributors when iterating, and we should also make some effort to not include such contributors in the first place.
<rdar://problem/103913539>
Pull request: https://github.com/WebKit/WebKit/pull/8235
Committed 258691@main (c7f03062cc76): <https://commits.webkit.org/258691@main> Reviewed commits have been landed. Closing PR #8235 and removing active labels.