Error: during expansion of (dbind21 ...) - unbound variable: macro-helpers#seq-destruc

	Call history:

	<syntax>	  (##core#require-extension (bindings) #t)
	<syntax>	  (##core#begin (##core#begin (##core#begin (##sys#require (quote bindings))) (import bindings)) (##co......
	<syntax>	  (##core#begin (##core#begin (##sys#require (quote bindings))) (import bindings))
	<syntax>	  (##core#begin (##sys#require (quote bindings)))
	<syntax>	  (##sys#require (quote bindings))
	<syntax>	  (quote bindings)
	<syntax>	  (##core#quote bindings)
	<syntax>	  (import bindings)
	<syntax>	  (import scheme (only macro-helpers define-syntax-rule replace* seq-length seq-ref seq-tail bind-exce......
	<syntax>	  (import scheme (only chicken receive case-lambda define-values let-values make-parameter error signa......
	<syntax>	  (##core#undefined)
	<syntax>	  (##core#undefined)
	<syntax>	  (##core#undefined)
	<syntax>	  (##core#undefined)
	<syntax>	  (pp (bind (a b c) (list 1 2 3) (list c b a)))
	<syntax>	  (bind (a b c) (list 1 2 3) (list c b a))	<--