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-rw-r--r--l/src/option.lisp6
1 files changed, 6 insertions, 0 deletions
diff --git a/l/src/option.lisp b/l/src/option.lisp
index 2c3f0d0..3dde8af 100644
--- a/l/src/option.lisp
+++ b/l/src/option.lisp
@@ -37,5 +37,11 @@
(opts:exit 64))
+ ;; Error if no extension IDs were given.
+ (when (null free-args)
+ (format *error-output* "error: missing extension IDs~%")
+
+ (opts:exit 64))
+
(make-config :socket-url (getf options :socket-url)
:extension-ids free-args)))