cl-ecase in package-lint--check-version-regexp-list is used wrongly, which triggers a byte-compilation warning after emacs-mirror/emacs@fffa53f. cl-(e)case recognizes either a list of keys or a single key as the head of each clause, which means 'SYMBOL is considered a list of two keys quote and SYMBOL.
cl-ecaseinpackage-lint--check-version-regexp-listis used wrongly, which triggers a byte-compilation warning after emacs-mirror/emacs@fffa53f.cl-(e)caserecognizes either a list of keys or a single key as the head of each clause, which means'SYMBOLis considered a list of two keysquoteandSYMBOL.