It's not uncommon to have a method throw an exception when you make a programming error so that you get immediate feedback. Not knowing offhand which method(s) were called, my guess would be that they're designed to always succeed if you specify the correct parameter values, so the assertion is letting you know that your parameters aren't correct.
It's not like the case where, for example, you're trying to delete a file that may or may not be there. In general usage either of those cases is just as valid so the file system reports the error, if any, and lets your app decide what to do. > On Apr 7, 2018, at 1:18 PM, Alan Snyder <applemail832...@cbfiddle.com> wrote: > > I understand that my program is doing it wrong. But is it normal to have an > assertion failure, rather than an error return? > > >> On Apr 7, 2018, at 12:04 PM, Rob Petrovec <petr...@mac.com> wrote: >> >> It’s saying that you are doing it wrong. Utility windows cannot go full >> screen. You have yours set to go full screen. It shouldn’t be. >> >> —Rob >> >> >>> On Apr 7, 2018, at 10:24 AM, Alan Snyder <applemail832...@cbfiddle.com> >>> wrote: >>> >>> I am getting an assertion failure notice on the console when running a >>> small test program: >>> >>> Assertion failure in -[AWTWindow_Panel _validateCollectionBehavior:], >>> /Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1504.83.101/AppKit.subproj/NSWindow.m:14741 >>> >>> (This message is on 10.12.6, the details are different on 10.13.) >>> >>> When run under Xcode, there is more information: utility panels cannot be >>> fullscreen primary >>> >>> My question—does this represent a bug in AppKit that I should report, or is >>> it trying to help me by explaining that my program provided an unsupported >>> set of style bits when creating a window? >>> >>> Alan _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
