fix crash, issue where pmip is not run on some frames

Author: Michael DeRoy

PmipCallStackFilter.cs

@@ -3,8 +3,9 @@
 
 namespace PmipMyCallStack
 {
-	public class PmipCallStackFilter : IDkmCallStackFilter
-	{
+    public class PmipCallStackFilter : IDkmCallStackFilter
+    {
+
 		public DkmStackWalkFrame[] FilterNextFrame(DkmStackContext stackContext, DkmStackWalkFrame input)
 		{
 			if (input == null) // after last frame
@@ -13,7 +14,7 @@ public DkmStackWalkFrame[] FilterNextFrame(DkmStackContext stackContext, DkmStac
 			if (input.InstructionAddress == null) // error case
 				return new[] { input };
 
-			if (input.InstructionAddress.ModuleInstance != null) // code in existing module
+			if (input.InstructionAddress.ModuleInstance != null && input.InstructionAddress.ModuleInstance.Module != null) // code in existing module
 				return new[] { input };
 
 			var runner = new PmipRunner(stackContext, input);

PmipRunner.cs

@@ -36,7 +36,7 @@ public DkmStackWalkFrame PmipStackFrame()
 			var eval = EvaluateExpression(call, r =>
 			{
 				isNull = r.Address.InstructionAddress.CPUInstructionPart.InstructionPointer == 0;
-				result = isNull ? "<ERROR>" : r.Value?.Split('"')[1];
+				result = r.Value ?? "<ERROR>";
 			});
 
 			if (!eval || isNull)