bpo-30911: Fix a crash in json on platforms with unsigned char (#2684)

when pass bad strict argument.

diff --git a/Modules/_json.c b/Modules/_json.c
index f574004b38e002a7029251eb54e44caa63892b95..07bcd318b1eb7f8c06534fced85b2ae303d59651 100644 (file)
--- a/Modules/_json.c
+++ b/Modules/_json.c
@@ -18,7 +18,7 @@ static PyTypeObject PyEncoderType;
 
 typedef struct _PyScannerObject {
     PyObject_HEAD
-    char strict;
+    signed char strict;
     PyObject *object_hook;
     PyObject *object_pairs_hook;
     PyObject *parse_float;