[Orgmode] Compilation error about org-protecting-blocks

[Baoqiu Cui]

Hi,

I just did the following:

   git pull
   make clean
   make all

but hit this error:

   ...
   In toplevel form:
   lisp/org-exp.el:31:1:Error: Symbol's value as variable is void: 
org-protecting-blocks
   make: *** [lisp/org-exp.elc] Error 1

Is this a known problem?

Thanks,
Baoqiu