## Function: SB-DEBUG:BACKTRACE [](../) [](../#function) [](https://github.com/sbcl/sbcl/blob/master/src/code/debug.lisp/) > The function SB-DEBUG:BACKTRACE has been deprecated as of SBCL version 1.2.15. > > Use SB-DEBUG:PRINT-BACKTRACE instead. ### Lambda list ```cl (&optional count stream) ```