Fixed: Repack check failing for episode file without a known release group

src/NzbDrone.Core/DecisionEngine/Specifications/RepackSpecification.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Linq;
 using NLog;
+using NzbDrone.Common.Extensions;
 using NzbDrone.Core.IndexerSearch.Definitions;
 using NzbDrone.Core.Parser.Model;
 
@@ -30,7 +31,7 @@ namespace NzbDrone.Core.DecisionEngine.Specifications
                 var releaseGroup = subject.ParsedEpisodeInfo.ReleaseGroup;
                 var fileReleaseGroup = file.ReleaseGroup;
 
-                if (!fileReleaseGroup.Equals(releaseGroup, StringComparison.InvariantCultureIgnoreCase))
+                if (fileReleaseGroup.IsNotNullOrWhiteSpace() && !fileReleaseGroup.Equals(releaseGroup, StringComparison.InvariantCultureIgnoreCase))
                 {
                     _logger.Debug("Release is a repack for a different release group. Release Group: {0}. File release group: {0}", releaseGroup, fileReleaseGroup);
                     return Decision.Reject("Release is a repack for a different release group. Release Group: {0}. File release group: {0}", releaseGroup, fileReleaseGroup);

src/NzbDrone.Core/Parser/QualityParser.cs

@@ -32,10 +32,10 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex RawHDRegex = new Regex(@"\b(?<rawhd>RawHD|1080i[-_. ]HDTV|Raw[-_. ]HD|MPEG[-_. ]?2)\b",
                                                                 RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        private static readonly Regex ProperRegex = new Regex(@"\b(?<proper>proper|rerip)\b",
+        private static readonly Regex ProperRegex = new Regex(@"\b(?<proper>proper)\b",
                                                                 RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
-        private static readonly Regex RepackRegex = new Regex(@"\b(?<repack>repack)\b",
+        private static readonly Regex RepackRegex = new Regex(@"\b(?<repack>repack|rerip)\b",
             RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private static readonly Regex VersionRegex = new Regex(@"\dv(?<version>\d)\b|\[v(?<version>\d)\]",