Make erc work better when encountering unknown prefix chars

* lisp/erc/erc.el (erc-channel-receive-names): Output a warning
instead of erroring out on unknown prefix chars (bug#22380).

diff --git a/lisp/erc/erc.el b/lisp/erc/erc.el
index 56317b83a98a2cba231bcb118f014a6e243e8b4c..b7f40a878a91b3c2de59d867563117fd79b404dc 100644 (file)
--- a/lisp/erc/erc.el
+++ b/lisp/erc/erc.el
@@ -4830,7 +4830,7 @@ channel."
                        ((pred (eq op-ch))    op)
                        ((pred (eq adm-ch))   admin)
                        ((pred (eq own-ch))   owner)
-                       (_ (error "Unknown prefix char `%S'" ch) voice))
+                       (_ (message "Unknown prefix char `%S'" ch) voice))
                      'on)))
           (when updatep
            ;; If we didn't issue the NAMES request (consider two clients