updated for version 7.3.825

Problem:    With Python errors are not always clear.
Solution:   Print the stack trace, unless :silent is used. (ZyX)

src/if_python.c

@@ -148,6 +148,7 @@ struct PyMethodDef { Py_ssize_t a; };
 # define PyDict_SetItemString dll_PyDict_SetItemString
 # define PyErr_BadArgument dll_PyErr_BadArgument
 # define PyErr_Clear dll_PyErr_Clear
+# define PyErr_PrintEx dll_PyErr_PrintEx
 # define PyErr_NoMemory dll_PyErr_NoMemory
 # define PyErr_Occurred dll_PyErr_Occurred
 # define PyErr_SetNone dll_PyErr_SetNone
@@ -251,6 +252,7 @@ static void* (*dll_PyMem_Malloc)(size_t);
 static int(*dll_PyDict_SetItemString)(PyObject *dp, char *key, PyObject *item);
 static int(*dll_PyErr_BadArgument)(void);
 static void(*dll_PyErr_Clear)(void);
+static void(*dll_PyErr_PrintEx)(int);
 static PyObject*(*dll_PyErr_NoMemory)(void);
 static PyObject*(*dll_PyErr_Occurred)(void);
 static void(*dll_PyErr_SetNone)(PyObject *);
@@ -380,6 +382,7 @@ static struct
     {"PyDict_SetItemString", (PYTHON_PROC*)&dll_PyDict_SetItemString},
     {"PyErr_BadArgument", (PYTHON_PROC*)&dll_PyErr_BadArgument},
     {"PyErr_Clear", (PYTHON_PROC*)&dll_PyErr_Clear},
+    {"PyErr_PrintEx", (PYTHON_PROC*)&dll_PyErr_PrintEx},
     {"PyErr_NoMemory", (PYTHON_PROC*)&dll_PyErr_NoMemory},
     {"PyErr_Occurred", (PYTHON_PROC*)&dll_PyErr_Occurred},
     {"PyErr_SetNone", (PYTHON_PROC*)&dll_PyErr_SetNone},
@@ -856,7 +859,11 @@ DoPythonCommand(exarg_T *eap, const char *cmd, typval_T *rettv)
 
 	r = PyRun_String((char *)(cmd), Py_eval_input, globals, globals);
 	if (r == NULL)
+	{
+	    if (PyErr_Occurred() && !msg_silent)
+		PyErr_PrintEx(0);
 	    EMSG(_("E858: Eval did not return a valid python object"));
+	}
 	else
 	{
 	    if (ConvertFromPyObject(r, rettv) == -1)

src/if_python3.c

@@ -122,6 +122,7 @@ static void init_structs(void);
 # define PyDict_SetItemString py3_PyDict_SetItemString
 # define PyErr_BadArgument py3_PyErr_BadArgument
 # define PyErr_Clear py3_PyErr_Clear
+# define PyErr_PrintEx py3_PyErr_PrintEx
 # define PyErr_NoMemory py3_PyErr_NoMemory
 # define PyErr_Occurred py3_PyErr_Occurred
 # define PyErr_SetNone py3_PyErr_SetNone
@@ -279,6 +280,7 @@ static int (*py3_PyMem_Free)(void *);
 static void* (*py3_PyMem_Malloc)(size_t);
 static int (*py3_Py_IsInitialized)(void);
 static void (*py3_PyErr_Clear)(void);
+static void (*py3_PyErr_PrintEx)(int);
 static PyObject*(*py3__PyObject_Init)(PyObject *, PyTypeObject *);
 static iternextfunc py3__PyObject_NextNotImplemented;
 static PyObject* py3__Py_NoneStruct;
@@ -403,6 +405,7 @@ static struct
     {"_Py_FalseStruct", (PYTHON_PROC*)&py3__Py_FalseStruct},
     {"_Py_TrueStruct", (PYTHON_PROC*)&py3__Py_TrueStruct},
     {"PyErr_Clear", (PYTHON_PROC*)&py3_PyErr_Clear},
+    {"PyErr_PrintEx", (PYTHON_PROC*)&py3_PyErr_PrintEx},
     {"PyObject_Init", (PYTHON_PROC*)&py3__PyObject_Init},
     {"PyModule_AddObject", (PYTHON_PROC*)&py3_PyModule_AddObject},
     {"PyImport_AppendInittab", (PYTHON_PROC*)&py3_PyImport_AppendInittab},
@@ -842,7 +845,11 @@ DoPy3Command(exarg_T *eap, const char *cmd, typval_T *rettv)
 	r = PyRun_String(PyBytes_AsString(cmdbytes), Py_eval_input,
 			 globals, globals);
 	if (r == NULL)
+	{
+	    if (PyErr_Occurred() && !msg_silent)
+		PyErr_PrintEx(0);
 	    EMSG(_("E860: Eval did not return a valid python 3 object"));
+	}
 	else
 	{
 	    if (ConvertFromPyObject(r, rettv) == -1)

src/version.c

@@ -725,6 +725,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    825,
 /**/
     824,
 /**/