public inbox for [email protected]
help / color / mirror / Atom feedFrom: Michael Paquier <[email protected]>
To: [email protected]
Subject: pgsql: Fix off-by-one with NFC recomposition for Hangul U+11A7 (TBASE)
Date: Thu, 04 Jun 2026 22:50:39 +0000
Message-ID: <[email protected]> (raw)
Fix off-by-one with NFC recomposition for Hangul U+11A7 (TBASE)
The NFC recomposition incorrectly included TBASE as a valid T syllable,
which is incorrect based on the Unicode specification (TBASE is one
below the start of the range, range beginning at U+11A8).
This would cause the TBASE to be silently swallowed in the
normalization, leading to an incorrect result.
A couple of regression tests are added to check more patterns with
Hangul recomposition and decomposition, on top of a test to check the
problem with TBASE. Diego has submitted the code fix, and I have
written the tests.
Author: Diego Frias <[email protected]>
Co-authored-by: Michael Paquier <[email protected]>
Discussion: https://postgr.es/m/[email protected]
Backpatch-through: 14
Branch
------
REL_16_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/82116023e424cba4ac7adefd261bd382ad6e40c8
Modified Files
--------------
src/common/unicode_norm.c | 2 +-
src/test/regress/expected/unicode.out | 78 +++++++++++++++++++++++++++++++++++
src/test/regress/sql/unicode.sql | 20 +++++++++
3 files changed, 99 insertions(+), 1 deletion(-)
view thread (6+ messages) latest in thread
reply
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: [email protected]
Cc: [email protected], [email protected]
Subject: Re: pgsql: Fix off-by-one with NFC recomposition for Hangul U+11A7 (TBASE)
In-Reply-To: <[email protected]>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox