## Function: SB-DEBUG:LIST-BACKTRACE
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> Returns a list describing the call stack. Each frame is represented
> by a sublist:
> 
> (<name> ...args...)
> 
> where the name describes the function responsible for the frame. The name
> might not be bound to the actual function object. Unavailable arguments are
> represented by dummy objects that print as #<unavailable argument>. Objects
> with dynamic-extent allocation by the current thread are represented by
> substitutes to avoid references to them from leaking outside their legal
> extent.
> 
> COUNT is the number of frames to backtrace, defaulting to
> *BACKTRACE-FRAME-COUNT*.
> 
> START is the number of the frame the backtrace should start from.
> 
> FROM specifies the frame relative to which the frames are numbered. Possible
> values are an explicit SB-DI:FRAME object, and the
> keywords :CURRENT-FRAME, :INTERRUPTED-FRAME, and :DEBUGGER-FRAME. Default
> is :DEBUGGER-FRAME.
> 
> :CURRENT-FRAME
> specifies the caller of LIST-BACKTRACE.
> 
> :INTERRUPTED-FRAME
> specifies the first interrupted frame on the stack (typically the frame
> where the error occured, as opposed to error handling frames) if any,
> otherwise behaving as :CURRENT-FRAME.
> 
> :DEBUGGER-FRAME
> specifies the currently debugged frame when inside the debugger, and
> behaves as :INTERRUPTED-FRAME outside the debugger.
> 
> METHOD-FRAME-STYLE (defaulting to *METHOD-FRAME-STYLE*), determines how frames
> corresponding to method functions are printed. Possible values
> are :MINIMAL, :NORMAL, and :FULL. See *METHOD-FRAME-STYLE* for more
> information.

### Lambda list
```cl
(&key count sb-debug::start sb-debug::from sb-debug::method-frame-style)
```