How do I submit an XCode bug to Apple?

Question

As a developer, I have come across a few bugs in Xcode and Swift, which don't lead to crashes, and thus don't report the errors to Apple. I'm talking about crashes of my app where the exception raised is not visible in the log (ex. wrong cast) or the error by the compiler is just wrong (calling a class func from a variable initializer).

Where do I submit these to Apple?

Examples:

• https://i.imgur.com/hYBSlsX.png
• https://i.imgur.com/BoNPYxr.png (while log is empty, no error whatsoever)

Answer 1

Apple provides some informations on their website how you can send bug reports to them. The best way is to use the Apple Bug Reporter.

How to use the bug reporter.