uiop/image:print-condition-backtrace

(uiop/image:print-condition-backtrace condition &key stream count)

Prints a report for condition to stream (default *error-output*). Lite: no backend carries a Lisp-level call stack, so there is no backtrace to print and the report is the condition alone; count is accepted and ignored. Real UIOP falls back to the same shape on an implementation with no backtrace API.

boom

The name lives in the uiop/image package, as upstream, and the uiop package re-exports it -- uiop:print-condition-backtrace names the same function. lack-middleware-backtrace is what asks for it.

Backend support

Works on all four backends: it is a uiop library definition written in rontolisp itself and compiled into the program when used.