This bug was detected while running docker.el and other packages that depend on tablist [1]. Tablist is an extension of tabulated-list-mode that provides the ability to filter the tabulated list via an expression language. I am not the author of tablist however the author is aware of this issue.
In 27.0.90, tablist is now giving an error when entering its expression editor. In the debugger I traced the error to wisent-total-conflicts in lisp/cedet/semantic/wisent/comp.el line 2273, in commit 390b4bc1e25fe691548d7ec982eb2f7027fe26a3 [2]. That commit introduced a mechanism to ignore “expected conflicts” via a symbol whose name is constructed on the fly like this:
(require 'semantic/wisent/comp)
(require 'semantic/wisent/wisent)
(defvar tablist-filter-wisent-grammar
'(
;; terminals
;; Use lowercase for better looking error messages.
(operand unary-operator binary-operator or and not)
;; terminal associativity & precedence
((left binary-operator)
(left unary-operator)
(left or)
(left and)
(left not))
;; rules
(filter-or-empty
((nil))
((?\( ?\)) nil)
((filter) $1))
(filter
((operand) $1) ;;Named filter
((operand binary-operator operand) `(,(intern $2) ,$1 ,$3))
((unary-operator operand) `(,(intern $1) ,$2))
((not filter) `(not ,$2))
((filter and filter) `(and ,$1 ,$3))
((filter or filter) `(or ,$1 ,$3))
((?\( filter ?\)) $2))))
(wisent-compile-grammar tablist-filter-wisent-grammar)
;; error => “replace-regexp-in-string: Wrong type argument: arrayp, nil”