PyRun_SimpleString won't parse \\x

[gnupun]

BPO	1418374

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2006-01-30.16:16:45.000>
created_at = <Date 2006-01-30.07:43:56.000>
labels = ['interpreter-core', 'invalid']
title = "PyRun_SimpleString won't parse \\\\x"
updated_at = <Date 2006-01-30.16:16:45.000>
user = 'https://bugs.python.org/gnupun'

bugs.python.org fields:

activity = <Date 2006-01-30.16:16:45.000>
actor = 'effbot'
assignee = 'none'
closed = True
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2006-01-30.07:43:56.000>
creator = 'gnupun'
dependencies = []
files = []
hgrepos = []
issue_num = 1418374
keywords = []
message_count = 2.0
messages = ['27386', '27387']
nosy_count = 2.0
nosy_names = ['effbot', 'gnupun']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1418374'
versions = ['Python 2.4']

[gnupun]

I'm trying to use Python 2.4.2 from C on Win XP.
The following line of C code generates an error:

test.c:
PyRun_SimpleString( "s = 'C:\\xyz'\n" );

Output:
ValueError: invalid \x escape

The error message only occurs if 'x' follows the
slashes '\\x'. That is, no other letter causes this
problem:

PyRun_SimpleString( "s = 'C:\\ayz'\n" );
PyRun_SimpleString( "s = 'C:\\yyz'\n" );

Using forward slashes also prevents the error:
PyRun_SimpleString( "s = "C:/xyz'\n" ); // ok

[effbot]

Logged In: YES
user_id=38376

The following line of C code generates an error

C uses the same escape rules as Python, so your first
test snippet looks like "C:\xyz" to Python. which is
is an invalid string literal, just as the message says.

see the Python language reference to details on string
literal syntax.