https://bugs.webkit.org/show_bug.cgi?id=228878 <rdar://problem/60147231> Reviewed by Brent Fulgham. exportData() could return nullptr. We should check the value of rsaComponents before trying to use it. * crypto/keys/CryptoKeyRSA.cpp: (WebCore::CryptoKeyRSA::exportJwk const): Canonical link: https://commits.webkit.org/240333@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@280747 268f45cc-cd09-0410-ab3c-d52691b4dbfc