eval-buffer with debug-on-error t

[Lennart Borgman]

I have debug-on-error set to t. When I do an eval-buffer and there is an 
undefined function:

  (this-is-no-fun)

I get the error "Wrong type argument: stringp, nul

If I instead let the region be the whole buffer and to eval-region I get 
a traceback with "Symbol's function definition is void: this-is-no-fun".

Is not the later much more useful? Can't eval-buffer return something 
similar?

When debug-on-error is nil eval-buffer returns the same as eval-region.