fix #1567; nil reference in spam_rules_enforcer.rb

lib/post_creator.rb

@@ -76,7 +76,7 @@ class PostCreator
                            { user: @user,
                              limit_once_per: 24.hours,
                              message_params: {domains: @post.linked_hosts.keys.join(', ')} } )
-    else
+    elsif @post && !@post.errors.present?
       SpamRulesEnforcer.enforce!(@post)
     end
 

spec/components/post_creator_spec.rb

@@ -44,6 +44,17 @@ describe PostCreator do
 
     end
 
+    context "invalid raw" do
+
+      let(:creator_invalid_raw) { PostCreator.new(user, basic_topic_params.merge(raw: '')) }
+
+      it "has errors" do
+        creator_invalid_raw.create
+        expect(creator_invalid_raw.errors).to be_present
+      end
+
+    end
+
     context "success" do
 
       it "doesn't return true for spam" do