In the playground REPL, am I missing an easy way to display errors as they happen? It seems any error messages aren't visible by default. Xcode shows a red "!"

In the playground REPL, am I missing an easy way to display errors as they happen? It seems any error messages aren't visible by default. Xcode shows a red "!" disc next to the line, and that's it. The usual shortcuts for "Jump to next/previous issue" are disabled. Opening the issues tab with command-4 works, but it's empty. Apparently I have to mouse over and click on the tiny red disc to see any error message at all, and then it displays as text that can't be selected or copied. EDIT: ctrl-command-M turns "Show all issues" on or off. It seems to be a little buggy, which may be why it's off by default. Hopefully we'll get the ability to copy the error text in the next refresh.