<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Swifters:<div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>I’m attempting to update some library code to beta 4 and I’ve run into something that’s either a bug or a deliberate change. In a class that’s a Foundation.Operation subclass, there are two finish() functions:</div><div class=""><br class=""></div><div class=""><div class="">final func finish(_ receivedErrors: [Error] = []) {</div><div class=""> _finish(receivedErrors, fromCancel: false)</div><div class="">}</div><div class=""><br class=""></div><div class="">/// Convenience method to simplify finishing when there is only one error.</div><div class="">final func finish(_ receivedError: Error?) {</div><div class=""> finish(receivedError.map { [$0]} ?? [])</div><div class="">}</div></div><div class=""><br class=""></div><div class="">Prior to beta 4 these functions lived side by side quite happily. In beta 4, however, their existence produces this error:</div><div class=""><br class=""></div><div class=""><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; line-height: normal; font-family: Menlo;" class="">method 'finish' with Objective-C selector 'finish:' conflicts with previous declaration with the same Objective-C selector</div></div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><br class=""></div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-family: Helvetica; font-size: 12px; text-indent: 0px;" class="">Now, if I mark one of the functions @nonobjc, it compiles. So is this a bug or change in behavior?</span></div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-family: Helvetica; font-size: 12px; text-indent: 0px;" class=""><br class=""></span></div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-family: Helvetica; font-size: 12px; text-indent: 0px;" class=""><br class=""></span></div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-family: Helvetica; font-size: 12px; text-indent: 0px;" class=""><br class=""></span></div><div style="margin: 0px 0px 0px 12px; text-indent: -12px; font-size: 11px; line-height: normal; font-family: Menlo;" class=""><span style="font-family: Helvetica; font-size: 12px; text-indent: 0px;" class="">Jon Shier</span></div></body></html>