fix some null errors

Debugger/Debugger.Core/Breakpoint.cs

@@ -45,11 +45,6 @@ namespace Debugger
 			set { line = value; }
 		}
 		
-		public string TypeName {
-			get;
-			set;
-		}
-		
 		public int Column {
 			get { return column; }
 			protected set { column = value; }
@@ -75,6 +70,10 @@ namespace Debugger
 			}
 		}
 		
+		public string TypeName {
+			get; protected set;
+		}
+		
 		protected virtual void OnHit(BreakpointEventArgs e)
 		{
 			if (Hit != null) {
@@ -176,12 +175,11 @@ namespace Debugger
 	
 	public class ILBreakpoint : Breakpoint
 	{
-		public ILBreakpoint(NDebugger debugger, string typeName, string memberReferenceName, int line, int metadataToken, int offset, bool enabled)
+		public ILBreakpoint(NDebugger debugger, string typeName, int line, int metadataToken, int offset, bool enabled)
 		{
 			this.Debugger = debugger;
 			this.Line = line;
 			this.TypeName = typeName;
-			this.MemberReferenceName = memberReferenceName;
 			this.MetadataToken = metadataToken;
 			this.ILOffset = offset;
 			this.Enabled = enabled;
@@ -191,8 +189,6 @@ namespace Debugger
 		
 		public int ILOffset { get; private set; }
 		
-		public string MemberReferenceName { get; private set; }
-		
 		public override bool SetBreakpoint(Module module)
 		{
 			SourcecodeSegment segment = SourcecodeSegment.CreateForIL(module, this.Line, (int)MetadataToken, ILOffset);

Debugger/ILSpy.Debugger/Commands/DebuggerCommands.cs

@@ -83,7 +83,7 @@ namespace ICSharpCode.ILSpy.Debugger.Commands
 		
 		public override void Execute(object parameter)
 		{
-			DebugInformation.LoadedAssemblies = MainWindow.Instance.CurrentAssemblyList.GetAssemblies().Select(a => a.AssemblyDefinition);
+			
 		}
 		
 		protected static IDebugger CurrentDebugger {

Debugger/ILSpy.Debugger/Services/Debugger/WindowsDebugger.cs

@@ -549,7 +549,6 @@ namespace ICSharpCode.ILSpy.Debugger.Services
 			breakpoint = new ILBreakpoint(
 				debugger,
 				bookmark.MemberReference.DeclaringType.FullName,
-				bookmark.MemberReference.FullName,
 				bookmark.LineNumber,
 				bookmark.MemberReference.MetadataToken.ToInt32(),
 				bookmark.ILRange.From,
@@ -817,6 +816,8 @@ namespace ICSharpCode.ILSpy.Debugger.Services
 			int ilOffset = frame.IP;
 			string fullName = debugType.FullNameWithoutGenericArguments;
 			
+			DebugInformation.LoadedAssemblies =  MainWindow.Instance.CurrentAssemblyList.GetAssemblies().Select(a => a.AssemblyDefinition);
+			
 			if (DebugInformation.LoadedAssemblies == null)
 				throw new NullReferenceException("No DebugData assemblies!");
 			else {

ILSpy/TextView/DecompilerTextView.cs

@@ -456,7 +456,7 @@ namespace ICSharpCode.ILSpy.TextView
 					int ilOffset = DebugInformation.DebugStepInformation.Item2;
 					int line;
 					MemberReference member;
-					if (!DebugInformation.CodeMappings.ContainsKey(token))
+					if (DebugInformation.CodeMappings == null || !DebugInformation.CodeMappings.ContainsKey(token))
 						return;
 					
 					DebugInformation.CodeMappings[token].GetInstructionByTokenAndOffset(token, ilOffset, out member, out line);