The *trace-output* system variable contains a file pointer that points to the file where all trace output goes to. The default file for *trace-output* is the system standard error device, normally the screen.
*trace-output* ; returns #<File-Stream...>
Note: *trace-output*, *debug-io* and *error-output* are normally all set to the same file stream 'stderr'.
See the
*trace-output*
system variable in the