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[3.9] bpo-45461: Fix IncrementalDecoder and StreamReader in the "unicode-escape" codec (GH-28939) (GH-28945)

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They support now splitting escape sequences between input chunks.

Add the third parameter "final" in codecs.unicode_escape_decode().
It is True by default to match the former behavior.
(cherry picked from commit c96d1546b1)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Serhiy Storchaka 2021-10-14 20:03:29 +03:00 • committed by GitHub
parent 38fadbc5b9
commit 7c722e32bf
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10 changed files with 9836 additions and 4890 deletions
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Python/ast.c
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@ -4640,7 +4640,7 @@ decode_unicode_with_escapes(struct compiling *c, const node *n, const char *s,
s = buf;
const char *first_invalid_escape;
v = _PyUnicode_DecodeUnicodeEscape(s, len, NULL, &first_invalid_escape);
v = _PyUnicode_DecodeUnicodeEscapeInternal(s, len, NULL, NULL, &first_invalid_escape);
if (v != NULL && first_invalid_escape != NULL) {
if (warn_invalid_escape_sequence(c, n, *first_invalid_escape) < 0) {