Use full oparg for name index in LOAD_GLOBAL and LOAD_ATTR

Author: markshannon

Include/internal/pycore_magic_number.h

@@ -279,7 +279,7 @@ PC/launcher.c must also be updated.
 
 */
 
-#define PYC_MAGIC_NUMBER 3614
+#define PYC_MAGIC_NUMBER 3615
 /* This is equivalent to converting PYC_MAGIC_NUMBER to 2 bytes
    (little-endian) and then appending b'\r\n'. */
 #define PYC_MAGIC_NUMBER_TOKEN \

Include/internal/pycore_opcode_metadata.h

@@ -582,9 +582,9 @@ def get_argval_argrepr(self, op, arg, offset):
                 argval, argrepr = _get_const_info(deop, arg, self.co_consts)
             elif deop in hasname:
                 if deop == LOAD_GLOBAL:
-                    argval, argrepr = _get_name_info(arg//2, get_name)
+                    argval, argrepr = _get_name_info(arg, get_name)
                 elif deop == LOAD_ATTR or deop == LOAD_METHOD:
-                    argval, argrepr = _get_name_info(arg//2, get_name)
+                    argval, argrepr = _get_name_info(arg, get_name)
                     if deop == LOAD_METHOD and argrepr:
                         argrepr = f"{argrepr} + NULL|self"
                 elif deop == LOAD_SUPER_ATTR or deop == LOAD_SUPER_METHOD: