inline: Prevent creating a file named ".mdwn" when the postform is submitted with an empty title.

IkiWiki/Plugin/inline.pm

@@ -121,6 +121,9 @@ sub sessioncgi ($$) {
 	if ($q->param('do') eq 'blog') {
 		my $page=titlepage(decode_utf8(scalar $q->param('title')));
 		$page=~s/(\/)/"__".ord($1)."__"/eg; # don't create subdirs
+		if (! length $page) {
+			error(gettext("please enter a page title"));
+		}
 		# if the page already exists, munge it to be unique
 		my $from=$q->param('from');
 		my $add="";

debian/changelog

@@ -1,3 +1,10 @@
+ikiwiki (3.20160906) UNRELEASED; urgency=medium
+
+  * inline: Prevent creating a file named ".mdwn" when the
+    postform is submitted with an empty title.
+
+ -- Joey Hess <id@joeyh.name>  Wed, 21 Sep 2016 13:48:32 -0400
+
 ikiwiki (3.20160905) unstable; urgency=medium
 
   [ Joey Hess ]

doc/bugs/inline_postform_empty_title.mdwn

@@ -1,4 +1,6 @@
 When using inline with postform=yes, the user can click on the edit button
 without providing a title, and are allowed to save the page. This results
 in a file with a name like ".mdwn", which ikiwiki won't render.
--[[Joey]]
+--[[Joey]]
+
+> [[done]]; made it error out in this case.