fixed issue #6 ( wrong exception output if it description has special symbols )

sources/pyapi.h

@@ -151,7 +151,7 @@ class PyObjectRef
 {
 public:
 
-    PyObjectRef() : m_obj(0)
+    PyObjectRef() : m_obj(nullptr)
     {}
 
     PyObjectRef(PyObject* obj)
@@ -170,6 +170,11 @@ public:
         return m_obj;
     }
 
+    PyObject** operator&()
+    {
+        return &m_obj;
+    }
+
     PyObjectRef& operator= (const PyObjectRef& ref)
     {
         if (m_obj)

sources/windbgext.cpp

@@ -580,8 +580,7 @@ pip(
 
 void handleException()
 {
-    //   
-    PyObject  *errtype = NULL, *errvalue = NULL, *traceback = NULL;
+    PyObjectRef  errtype, errvalue, traceback;
 
     PyErr_Fetch(&errtype, &errvalue, &traceback);
 
@@ -596,9 +595,9 @@ void handleException()
         PyObjectRef  format_exception = PyObject_GetAttrString(traceback_module, "format_exception");
 
         PyObjectRef  args = PyTuple_New(3);
-        PyTuple_SetItem(args, 0, errtype ? errtype : Py_None());
-        PyTuple_SetItem(args, 1, errvalue ? errvalue : Py_None());
-        PyTuple_SetItem(args, 2, traceback ? traceback : Py_None());
+        PyTuple_SetItem(args, 0, errtype ? static_cast<PyObject*>(errtype) : Py_None());
+        PyTuple_SetItem(args, 1, errvalue ? static_cast<PyObject*>(errvalue) : Py_None());
+        PyTuple_SetItem(args, 2, traceback ? static_cast<PyObject*>(traceback) : Py_None());
 
         PyObjectRef  lst = PyObject_Call(format_exception, args, NULL);
 
@@ -612,10 +611,6 @@ void handleException()
 
         throw std::exception(sstr.str().c_str());
     }
-
-    if (errtype) Py_DecRef(errtype);
-    if (errvalue) Py_DecRef(errvalue);
-    if (traceback) Py_DecRef(traceback);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -786,6 +781,10 @@ void printString(PDEBUG_CLIENT client, ULONG mask, const char* str)
 
         if ( prefer_dml && mask == DEBUG_OUTPUT_ERROR )
         {
+            line = std::regex_replace(line, std::regex("&"), "&amp;");
+            line = std::regex_replace(line, std::regex("<"), "&lt;");
+            line = std::regex_replace(line, std::regex(">"), "&gt;");
+
             control->ControlledOutput(
                 DEBUG_OUTCTL_AMBIENT_DML,
                 mask,