Thanks for the report!

This looks similar to an issue I saw recently, but in my case there were no toolchain changes involved. Can you try jumping to some other symbol, hit back, then try jumping to print again? That seems to clear it up temporarily for me. I'm still looking into what's going on here.

I've tried writing some code and jumping to definition for various symbols, without any toolchain changes, only using default 9.2 toolchain.

I'd say it works as expected about 80% of the time, but sometimes it just takes me to the first line of the generated interface. Hitting back and jumping to another symbol will sometimes clear it up. But I can't find a reliable way to reproduce it.

However, IF i change to a recent dev snapshot toolchain, it definitely will reproduce the issue (as described in the report, also note that there is no cursor in the generated interface), and the only way to clear it up seems to be to switch back to default 9.2 toolchain and try jumping to other symbols for a while (found no reliable way to do this repeatably though).

I mostly use a recent snapshot, and my feeling is that jump to definition never works (for eg Swift symbols, where the destination is in a generated interface). While reporting the issue I figured I should use the Xcode 9.2 default toolchain (which I almost never do) and then I noticed that it worked about 80% of the time, which is an improvement over what I'm used to. Switching back to a recent snapshot will make it mostly not work again.

I'm afraid I cannot describe the issue more clearly, it seems to be very random.

If you want me to make another log where the issue happens without any toolchain changes, I can do that (probably both using the 9.2 default toolchain and using a recent snapshot).