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-rw-r--r--lisp/emacs-lisp/bytecomp.el5
1 files changed, 5 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index a64c88c4f0d..1bf6d04b63b 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -295,6 +295,11 @@ The information is logged to `byte-compile-log-buffer'."
"If true, the byte-compiler reports warnings with `error'."
:group 'bytecomp
:type 'boolean)
+;; This needs to be autoloaded because it needs to be available to
+;; Emacs before the byte compiler is loaded, otherwise Emacs will not
+;; know that this variable is marked as safe until it is too late.
+;; (See https://lists.gnu.org/archive/html/emacs-devel/2018-01/msg00261.html )
+;;;###autoload(put 'byte-compile-error-on-warn 'safe-local-variable 'booleanp)
(defconst byte-compile-warning-types
'(redefine callargs free-vars unresolved