emit error for http1 parser errors as well

lib/httpx/connection/http1.rb

@@ -164,6 +164,9 @@ module HTTPX
         @requests.each do |request|
           emit(:error, request, ex)
         end
+        @pending.each do |request|
+          emit(:error, request, ex)
+        end
       end
     end
 

lib/httpx/connection/http2.rb

@@ -31,6 +31,7 @@ module HTTPX
     end
 
     def interests
+      # waiting for WINDOW_UPDATE frames
       return :r if @buffer.full?
 
       return :w if @connection.state == :closed