[CM] TRACE facility seems broken in 22.5

[bil at ccrma.Stanford.EDU]

It looks like some-sound is () which will cause save-sound-as
to raise an error.  If the error isn't caught, it will
cause the loop to stop and will return to the top level.
I'm guessing the output is from trace as the function is
entered, then you hit the error, and the current evaluation
is stopped.  () is an error because it does not identify
the sound you want to save.