This was caused by <https://trac.webkit.org/r239963>.
rdar://problem/47541039
Created attachment 360349 [details] Patch
Comment on attachment 360349 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=360349&action=review > Source/WebKit/WebProcess/com.apple.WebProcess.sb.in:575 > +#if __MAC_OS_X_VERSION_MIN_REQUIRED <= 101300 Comparisons against VERSION_MIN_REQUIRED and VERSION_MAX_ALLOWED should always use either >= or <, never <= or >.
Created attachment 360354 [details] Patch
(In reply to mitz from comment #3) > Comment on attachment 360349 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=360349&action=review > > > Source/WebKit/WebProcess/com.apple.WebProcess.sb.in:575 > > +#if __MAC_OS_X_VERSION_MIN_REQUIRED <= 101300 > > Comparisons against VERSION_MIN_REQUIRED and VERSION_MAX_ALLOWED should > always use either >= or <, never <= or >. Thanks for reviewing! I have updated the patch.
I have confirmed locally that this patch fixes the crash.
Comment on attachment 360354 [details] Patch r=me
Comment on attachment 360354 [details] Patch Thanks for reviewing!
Comment on attachment 360354 [details] Patch Clearing flags on attachment: 360354 Committed r240810: <https://trac.webkit.org/changeset/240810>
All reviewed patches have been landed. Closing bug.