with-compilation-unit records non-local control transfers and  
arranges for summarize-compilation-unit to report them to *error-
output*.

this can cause a thread to emit spurious output if an application  
terminates a compile call for good cause or if it provides its own  
facilities to record and report compilation errors.
would there be some reason to not add *compile-verbose* to the  
preconditions for summarize-compilation-unit's report?
if that is not appropriate, is there some other method to suppress  
this output?

best regards, from berlin;