Currently in the Windows build, on startup, WebView::setSelectTrailingWhitespaceEnabled and WebView::setSmartInsertDeleteEnabled recursively call each other until a stack overflow occurs. I believe this is a regression caused by changeset 145849 (http://trac.webkit.org/changeset/145849)
Created attachment 193451 [details] Patch
Just made the conditional logic in these methods consistent with the corresponding methods in WebKit/mac/WebView/WebView.mm.
*** Bug 112572 has been marked as a duplicate of this bug. ***
This is now fixed: http://trac.webkit.org/changeset/146097