[3.11] gh-102310: Change error range for invalid bytes literals (GH-103663) (#103703)

Author: miss-islington

Lib/test/test_syntax.py

@@ -1803,6 +1803,30 @@ def f(x: *b)
     Traceback (most recent call last):
         ...
     SyntaxError: invalid syntax
+
+Invalid bytes literals:
+
+   >>> b"Ā"
+   Traceback (most recent call last):
+      ...
+       b"Ā"
+        ^^^
+   SyntaxError: bytes can only contain ASCII literal characters
+
+   >>> b"абвгде"
+   Traceback (most recent call last):
+      ...
+       b"абвгде"
+        ^^^^^^^^
+   SyntaxError: bytes can only contain ASCII literal characters
+
+   >>> b"abc ъющый"  # first 3 letters are ascii
+   Traceback (most recent call last):
+      ...
+       b"abc ъющый"
+        ^^^^^^^^^^^
+   SyntaxError: bytes can only contain ASCII literal characters
+
 """
 
 import re

Misc/NEWS.d/next/Core and Builtins/2023-04-21-17-03-14.gh-issue-102310.anLjDx.rst

@@ -0,0 +1 @@
+Change the error range for invalid bytes literals.

Parser/string_parser.c

@@ -259,7 +259,8 @@ _PyPegen_parsestr(Parser *p, int *bytesmode, int *rawmode, PyObject **result,
         const char *ch;
         for (ch = s; *ch; ch++) {
             if (Py_CHARMASK(*ch) >= 0x80) {
-                RAISE_SYNTAX_ERROR(
+                RAISE_SYNTAX_ERROR_KNOWN_LOCATION(
+                                   t,
                                    "bytes can only contain ASCII "
                                    "literal characters");
                 return -1;