Log.error(exception: exception) {} is a no-op

[oprypin]

In my codebase a long time ago I had a line Log.error(exception: exception) {} in order to print an exception.
But now this line simply does nothing.

To work around this, I had to change this to Log.error(exception: exception) { "" }

• This seems related: Change Log emitters to not emit event when block output is nil #12000
  Thanks to @Blacksmoke16 for pointing me in this direction.

This behavior should be specced / documented / fixed. To me this behavior doesn't make sense. Why would I pass the exception arg, other than if I expect it to be printed