emacs26, ucs-normalize.el, Symbol’s function definition is void: regexp-opt-charset

[hx]

Hi list,

can't compile emacs26 today after git pull,

CentOS7 X64:

make[2]: Entering directory `/emacs-26-src/lisp'

  ELC      ../lisp/international/ucs-normalize.elc

In toplevel form:

international/ucs-normalize.el:266:56:Error: Symbol’s function definition is void: regexp-opt-charset

make[2]: *** [../lisp/international/ucs-normalize.elc] Error 1

$ git status

# On branch emacs-26

nothing to commit, working directory clean