> On Feb 19, 2016, at 1:17 PM, Jim Adams <jim.ad...@sas.com> wrote: > > SLogInfo(@"Starting csi %ld count %d", csi, sortedEvents.count); > > In the console I see: > INFO: Starting csi -1 count -1 > The very next line crashes when the sortedEvents are accessed. What could > cause the array to have a -1 count?
You’re using the wrong format strings for both of those parameters. csi is 64-bit so you need %lld. The formatter sees %ld and thinks it’s 32-bit not 64-bit, so it skips the wrong amount of space on the stack when going to the next parameter, which is why you then get a bogus value for the count. Also, NSArray.count is of type NSUInteger, which is unsigned, and has different sizes on different platforms. The right format specifier is either %lu (in a 32-bit app) or %llu (in 64-bit). FYI, You must be ignoring compiler warnings, or you've turned off the “type check printf” warning setting. Don’t do that ;) I always strongly recommend turning on “Treat warnings as errors”, which will force you to fix warnings. This is very useful because a number of compiler warnings are actually nasty and hard-to-find errors like the above. —Jens _______________________________________________ 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
