Stefan Monnier writes:
>>>> In toplevel form:
>>>> eieio.el:168:1:Error: Symbol's function definition is void:
>>>> eieio--class-parent
>>> Can you (setq byte-compile-error t debug-on-error t) so as to get
>>> a backtrace?
>> Did you mean `byte-compile-error-on-warn'? Anyway, I'm afraid I just
>> don't get a backtrace with debug-on-error.
>
> No, I meant byte-compile-debug sorry.

Ah OK, I didn't know that one. Now I get a trace, but it's huge, so I
gzipped it.

-David