On 2016-12-05 08:20, Stefan Monnier wrote:
>> (defun backtrace ()
>>   "Print a trace of Lisp function calls currently active.
>> Output stream used is value of `standard-output'."
>>   (mapbacktrace #'~/backtrace-1 1))
> 
> Have you tried it both byte-compiled and interpreted?  Maybe this
> function is just simple enough that the result is the same in both
> cases, but in my experience, the stack is sufficiently different in the
> two cases that a constant nskip doesn't cut it (hence the use of `base`
> in backtrace-frame).

Thanks; I attached an updated patch.  Removing `backtrace' from eval.c makes the patch much harder to read, so I'll do that later.

Clément.