You’re stopped at a breakpoint. That’s a debugging tool, not an error. See the blue arrow/tab in the left margin, where the line numbers are? Drag that away and drop it anywhere (you’ll see a “poof”) to remove it, then run your project again.
You can also deactivate all breakpoints by typing ⌘–Y, the key equivalent for the menu item Debug>Deactivate Breakpoints, or you can view all your breakpoints in the Breakpoint Navigator (hit ⌘–6).
When execution stops like this, you can continue from the breakpoint, either by typing continue
at the debugger prompt in the Console:
(lldb) continue
Or hitting the “Play” button in the debugger controls. You can also type Control–⌘–Y, which is the equivalent for the menu item Debug>Continue.