Stealth mode settings may break filtering completely

[ameshkov]

Here is the stack trace:

Error while processing connection: System.NullReferenceException: Ссылка на объект не указывает на экземпляр объекта.
Source: Adguard.Filter
Stack trace:    в Adguard.Filter.Rules.RequestFilter.BuildContentScriptUrl(FilteringContext context)
   в Adguard.Filter.Rules.RequestFilter.BuildInjectionUrls(FilteringContext context)
   в Adguard.Filter.Parser.ContentEditor.BuildContentInjection()
   в Adguard.Filter.Parser.ContentEditor.CheckEndTagInjection(HtmlElement element)
   в Adguard.Filter.Html.ContentEditingHtmlParser.OnEndElement(HtmlElement element, ParsingContext context)
   в Adguard.Filter.Html.HtmlParser.OnStartTagFound(HtmlElement element, Tag endTag, ParsingContext context)
   в Adguard.Filter.Html.HtmlParser.ProcessEndTag(Tag tag, ParsingContext context)
   в Adguard.Filter.Html.HtmlParser.ParseTags(ParsingContext context)
   в Adguard.Filter.Html.HtmlParser.Parse(ParsingContext context)
   в Adguard.Filter.HttpResponseFilter.FilterPageContent(FilteringContext filteringContext, Encoding pageEncoding, PeekingStream inputStream, Stream outputStream)
   в Adguard.Filter.HttpResponseFilter.FilterPage(FilteringContext filteringContext, Encoding pageEncoding, PeekingStream inputStream, Stream responseStream)
   в Adguard.Filter.HttpResponseFilter.FilterFixedLengthResponse(FilteringContext filteringContext, Encoding pageEncoding, PeekingStream inputStream, Stream responseStream)
   в Adguard.Filter.HttpResponseFilter.FilterHtmlResponse(FilteringContext filteringContext, Stream responseStream)
   в Adguard.Filter.HttpResponseFilter.FilterResponse(FilteringContext filteringContext, HttpResponse response, Stream responseStream)
   в Adguard.Network.Filter.HttpFilter.ProcessRequest(HttpRequest request, FilteringContext filteringContext, RecordingStream remoteRecordingStream)
   в Adguard.Network.Filter.HttpFilter.ProcessConnection(RecordingStream localRecordingStream, RecordingStream remoteRecordingStream)
   в Adguard.Network.Filter.HttpFilter.Filter()

[ameshkov]

Logs and settings DB (password in PM):
https://www.dropbox.com/s/s755fttk9oibfy3/issue_1693.zip?dl=0

Please note that for reproducing the issue you should turn Stealth mode back ON.

[confessor-adguard]

Review: ADWIN-CR-185

[ameshkov]

The issue caused by the custom user agent set by the user -- we failed to parse it.