5 files changed, 8 insertions, 10 deletions
diff --git a/Modules/_sqlite/connection.c b/Modules/_sqlite/connection.c
index d390328..a08ebfe 100644
--- a/Modules/_sqlite/connection.c
+++ b/Modules/_sqlite/connection.c
@@ -1241,6 +1241,9 @@ PyObject* pysqlite_connection_call(pysqlite_Connection* self, PyObject* args, Py
         return NULL;
     }
 
+    if (!_PyArg_NoKeywords(MODULE_NAME ".Connection()", kwargs))
+        return NULL;
+
     if (!PyArg_ParseTuple(args, "O", &sql))
         return NULL;
 
diff --git a/Modules/_sqlite/connection.h b/Modules/_sqlite/connection.h
index 0c9734c..fbd9063 100644
--- a/Modules/_sqlite/connection.h
+++ b/Modules/_sqlite/connection.h
@@ -52,7 +52,7 @@ typedef struct
      * first get called with count=0? */
     double timeout_started;
 
-    /* None for autocommit, otherwise a PyString with the isolation level */
+    /* None for autocommit, otherwise a PyUnicode with the isolation level */
     PyObject* isolation_level;
 
     /* NULL for autocommit, otherwise a string with the BEGIN statement; will be
diff --git a/Modules/_sqlite/cursor.c b/Modules/_sqlite/cursor.c
index db96b02..c1599c0 100644
--- a/Modules/_sqlite/cursor.c
+++ b/Modules/_sqlite/cursor.c
@@ -46,7 +46,7 @@ static pysqlite_StatementKind detect_statement_type(const char* statement)
 
     dst = buf;
     *dst = 0;
-    while (Py_ISALPHA(*src) && dst - buf < sizeof(buf) - 2) {
+    while (Py_ISALPHA(*src) && (dst - buf) < ((Py_ssize_t)sizeof(buf) - 2)) {
         *dst++ = Py_TOLOWER(*src++);
     }
 
@@ -334,11 +334,7 @@ PyObject* _pysqlite_fetch_one_row(pysqlite_Cursor* self)
                 if (self->connection->text_factory == (PyObject*)&PyUnicode_Type) {
                     converted = PyUnicode_FromStringAndSize(val_str, nbytes);
                     if (!converted) {
-#ifdef Py_DEBUG
-                        /* in debug mode, type_call() fails with an assertion
-                           error if an exception is set when it is called */
                         PyErr_Clear();
-#endif
                         colname = sqlite3_column_name(self->statement->st, i);
                         if (!colname) {
                             colname = "<unknown column name>";
diff --git a/Modules/_sqlite/microprotocols.h b/Modules/_sqlite/microprotocols.h
index 3a9944f..6941716 100644
--- a/Modules/_sqlite/microprotocols.h
+++ b/Modules/_sqlite/microprotocols.h
@@ -48,7 +48,7 @@ extern PyObject *pysqlite_microprotocols_adapt(
     PyObject *obj, PyObject *proto, PyObject *alt);
 
 extern PyObject *
-    pysqlite_adapt(pysqlite_Cursor* self, PyObject *args);   
+    pysqlite_adapt(pysqlite_Cursor* self, PyObject *args);
 #define pysqlite_adapt_doc \
     "adapt(obj, protocol, alternate) -> adapt obj to given protocol. Non-standard."
 
diff --git a/Modules/_sqlite/row.c b/Modules/_sqlite/row.c
index ee73446..07584e3 100644
--- a/Modules/_sqlite/row.c
+++ b/Modules/_sqlite/row.c
@@ -142,8 +142,7 @@ PyObject* pysqlite_row_subscript(pysqlite_Row* self, PyObject* idx)
         return NULL;
     }
     else if (PySlice_Check(idx)) {
-        PyErr_SetString(PyExc_ValueError, "slices not implemented, yet");
-        return NULL;
+        return PyObject_GetItem(self->data, idx);
     }
     else {
         PyErr_SetString(PyExc_IndexError, "Index must be int or string");
@@ -159,7 +158,7 @@ Py_ssize_t pysqlite_row_length(pysqlite_Row* self, PyObject* args, PyObject* kwa
 PyObject* pysqlite_row_keys(pysqlite_Row* self, PyObject* args, PyObject* kwargs)
 {
     PyObject* list;
-    int nitems, i;
+    Py_ssize_t nitems, i;
 
     list = PyList_New(0);
     if (!list) {