ggtags conflict with swiper

[Robert]

after successfully creating the 3 gtag-files in my project folder i am getting the following error message in the minibuffer while searching something with swiper:

error in process sentinel: Font-lock trying to use keywords before setting them up

Backtrace

Debugger entered--Lisp error: (error "Font-lock trying to use keywords before setting them up")
signal(error ("Font-lock trying to use keywords before setting them up"))
error("Font-lock trying to use keywords before setting them up")
font-lock-compile-keywords(nil)
(setq font-lock-keywords (font-lock-compile-keywords font-lock-keywords))
(if (eq (car font-lock-keywords) t) nil (setq font-lock-keywords (font-lock-compile-keywords font ........
font-lock-fontify-keywords-region(1 505 nil)
font-lock-default-fontify-region(1 505 nil)
ggtags-fontify-code("1)&&(a=a.substring(0,a.length-1));a=parseFloat(a ............
ggtags-get-definition-default((("1)&&(a=a.substring(0,a.length-1));a=parseFloat(a)||0;b=b ......
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(let* ((predicate (car (
ivy-read("Swiper: " (#(" <%@ page
swiper--ivy((#(" <%@ page ........
swiper()
funcall-interactively(swiper)
call-interactively(swiper nil nil)
command-execute(swiper)