Fix #3255: Ignore exceptions while decoding sequence point blobs.

ICSharpCode.ILSpyX/PdbProvider/PortableDebugInfoProvider.cs

@@ -98,31 +98,38 @@ namespace ICSharpCode.ILSpyX.PdbProvider
 			var debugInfo = metadata.GetMethodDebugInformation(method);
 			var sequencePoints = new List<Decompiler.DebugInfo.SequencePoint>();
 
-			foreach (var point in debugInfo.GetSequencePoints())
+			try
 			{
-				string documentFileName;
-
-				if (!point.Document.IsNil)
-				{
-					var document = metadata.GetDocument(point.Document);
-					documentFileName = metadata.GetString(document.Name);
-				}
-				else
+				foreach (var point in debugInfo.GetSequencePoints())
 				{
-					documentFileName = "";
+					string documentFileName;
+
+					if (!point.Document.IsNil)
+					{
+						var document = metadata.GetDocument(point.Document);
+						documentFileName = metadata.GetString(document.Name);
+					}
+					else
+					{
+						documentFileName = "";
+					}
+
+					sequencePoints.Add(new Decompiler.DebugInfo.SequencePoint() {
+						Offset = point.Offset,
+						StartLine = point.StartLine,
+						StartColumn = point.StartColumn,
+						EndLine = point.EndLine,
+						EndColumn = point.EndColumn,
+						DocumentUrl = documentFileName
+					});
 				}
 
-				sequencePoints.Add(new Decompiler.DebugInfo.SequencePoint() {
-					Offset = point.Offset,
-					StartLine = point.StartLine,
-					StartColumn = point.StartColumn,
-					EndLine = point.EndLine,
-					EndColumn = point.EndColumn,
-					DocumentUrl = documentFileName
-				});
+				return sequencePoints;
+			}
+			catch (BadImageFormatException)
+			{
+				return EmptyList<Decompiler.DebugInfo.SequencePoint>.Instance;
 			}
-
-			return sequencePoints;
 		}
 
 		public IList<Variable> GetVariables(MethodDefinitionHandle method)