Re: BUG #19406: substring(text) fails on valid UTF-8 toasted value in PostgreSQL 15.16

Thomas Munro <thomas.munro@gmail.com>

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From: Thomas Munro <thomas.munro@gmail.com>

To: Noah Misch <noah@leadboat.com>

Cc: ranvis@gmail.com, pgsql-bugs@lists.postgresql.org

Date: 2026-02-14T20:19:04Z

Lists: pgsql-bugs

Also, LGTM.

Commits

Suppress new "may be used uninitialized" warning.
- a0769e74d65d 14.22 landed
- ec86152e0209 15.17 landed
- 50d361f6223f 17.9 landed
- 2280ab354516 16.13 landed
- d04b34d685a2 18.3 landed
- 8cef93d8a588 19 (unreleased) landed
Fix SUBSTRING() for toasted multibyte characters.
- a20eb248c51a 15.17 landed
- 14b1fd6176cb 14.22 landed
- bdfb372280bc 16.13 landed
- 5d5232bc38d3 17.9 landed
- 6e045e1a6e3f 18.3 landed
- 9f4fd119b2cb 19 (unreleased) landed
pg_mblen_range, pg_mblen_with_len: Valgrind after encoding ereport.
- 44fc85bbf990 14.22 landed
- 8e73530f1546 17.9 landed
- 5b305ebcc9b5 15.17 landed
- 45eb47230d93 16.13 landed
- 4174e41b9e9e 18.3 landed
- 4644f8b23bb8 19 (unreleased) landed