Remove more uses of `rescue nil`.

lib/search.rb

@@ -73,7 +73,10 @@ class Search
 
       return if day == 0 || month == 0 || day > 31 || month > 12
 
-      return Time.zone.parse("#{year}-#{month}-#{day}") rescue nil
+      return begin
+        Time.zone.parse("#{year}-#{month}-#{day}")
+      rescue ArgumentError
+      end
     end
 
     if str.downcase == "yesterday"

plugins/poll/plugin.rb

@@ -66,7 +66,12 @@ after_initialize do
 
           # ensure no race condition when poll is automatically closed
           if poll["close"].present?
-            close_date = Time.zone.parse(poll["close"]) rescue nil
+            close_date =
+              begin
+                close_date = Time.zone.parse(poll["close"])
+              rescue ArgumentError
+              end
+
             raise StandardError.new I18n.t("poll.poll_must_be_open_to_vote") if close_date && close_date <= Time.zone.now
           end
 
@@ -159,7 +164,12 @@ after_initialize do
           Jobs.cancel_scheduled_job(:close_poll, post_id: post.id, poll_name: name)
 
           if poll["status"] == "open" && poll["close"].present?
-            close_date = Time.zone.parse(poll["close"]) rescue nil
+            close_date =
+              begin
+                Time.zone.parse(poll["close"])
+              rescue ArgumentError
+              end
+
             Jobs.enqueue_at(close_date, :close_poll, post_id: post.id, poll_name: name) if close_date && close_date > Time.zone.now
           end
         end