throw slightly more descriptive warning when loading a cue with a missing bin

BizHawk.Client.Common/RomLoader.cs

@@ -269,6 +269,9 @@ namespace BizHawk.Client.Common
 								return false;
 							}
 
+							if (discMountJob.OUT_ErrorLevel)
+								throw new InvalidOperationException(discMountJob.OUT_Log);
+
 							if(disc == null)
 								throw new InvalidOperationException("Can't load one of the files specified in the M3U");
 
@@ -324,6 +327,10 @@ namespace BizHawk.Client.Common
 							System.Windows.Forms.MessageBox.Show("This disc would take too long to load. Run it through discohawk first, or find a new rip because this one is probably junk");
 							return false;
 						}
+
+						if (discMountJob.OUT_ErrorLevel)
+							throw new InvalidOperationException(discMountJob.OUT_Log);
+
 						var disc = discMountJob.OUT_Disc;
 						//-----------
 						
@@ -457,6 +464,9 @@ namespace BizHawk.Client.Common
 											return false;
 										}
 
+										if (discMountJob.OUT_ErrorLevel)
+											throw new InvalidOperationException(discMountJob.OUT_Log);
+
 										if (disc == null)
 											throw new InvalidOperationException("Can't load one of the files specified in the M3U");
 

BizHawk.Emulation.DiscSystem/DiscFormats/CUE/CUE_Compile.cs

@@ -223,7 +223,9 @@ namespace BizHawk.Emulation.DiscSystem.CUE
 			string choice = null;
 			if (options.Count == 0)
 			{
-				Error("Couldn't resolve referenced cue file: " + f.Path);
+				Error(string.Format("Couldn't resolve referenced cue file: {0} ; you can commonly repair the cue file yourself, or a file might be missing", f.Path));
+				//add a null entry to keep the count from being wrong later (quiets a warning)
+				OUT_CompiledCueFiles.Add(null);
 				return;
 			}
 			else
@@ -303,6 +305,7 @@ namespace BizHawk.Emulation.DiscSystem.CUE
 				Error("Cue file doesn't specify any input files!");
 
 			//we can't reliably analyze the length of files here, because we might have to be decoding to get lengths (VBR mp3s)
+			//REMINDER: we could actually scan the mp3 frames in software
 			//So, it's not really worth the trouble. We'll cope with lengths later
 			//we could check the format of the wav file here, though
 
@@ -311,6 +314,8 @@ namespace BizHawk.Emulation.DiscSystem.CUE
 			OUT_LoadTime = 0;
 			foreach (var cfi in OUT_CompiledCueFiles)
 			{
+				if (cfi == null)
+					continue;
 				if (cfi.Type == CompiledCueFileType.DecodeAudio)
 				{
 					needsCodec = true;
@@ -477,6 +482,8 @@ namespace BizHawk.Emulation.DiscSystem.CUE
 
 			CreateTrack1Pregap();
 			FinalAnalysis();
+
+			FinishLog();
 			
 		} //Run()
 

BizHawk.Emulation.DiscSystem/DiscMountJob.cs

@@ -154,6 +154,8 @@ namespace BizHawk.Emulation.DiscSystem
 				//TODO - need better handling of log output
 				if (!string.IsNullOrEmpty(compileJob.OUT_Log)) Console.WriteLine(compileJob.OUT_Log);
 				ConcatenateJobLog(compileJob);
+				if (compileJob.OUT_ErrorLevel)
+					goto DONE;
 
 				//check slow loading threshold
 				if (compileJob.OUT_LoadTime >= IN_SlowLoadAbortThreshold)
@@ -180,6 +182,7 @@ namespace BizHawk.Emulation.DiscSystem
 				OUT_Disc = ccdLoader.LoadCCDToDisc(IN_FromPath, IN_DiscMountPolicy);
 			}
 
+
 		DONE:
 
 			//setup the lowest level synth provider

BizHawk.Emulation.DiscSystem/DiscTOC.cs

@@ -55,8 +55,8 @@ namespace BizHawk.Emulation.DiscSystem
 
 		/// <summary>
 		/// This is a convenient format for storing the TOC (taken from mednafen)
-		/// Index 0 is empty, so that track 1 is in index 1.
+		/// Element 0 is the Lead-in track
-		/// Index 100 is the Lead-out track
+		/// Element 100 is the Lead-out track
 		/// </summary>
 		public TOCItem[] TOCItems = new TOCItem[101];