fix segfault in autocomplete handler when redirecting to a database

[adameat]

Changelog entry

fix segfault in autocomplete handler when redirecting to a database
closes #8345

Changelog category

• Bugfix
• Not for changelog (changelog entry is not required)

Additional information

...

[github-actions]

⚪ 2024-08-28 07:07:59 UTC Pre-commit check for 33aaadd has started.
⚪ 2024-08-28 07:11:00 UTC Check linux-x86_64-release-clang14 is running...
🟢 2024-08-28 07:17:18 UTC Build successful.

[github-actions]

⚪ 2024-08-28 07:08:45 UTC Pre-commit check for 33aaadd has started.
⚪ 2024-08-28 07:11:40 UTC Check linux-x86_64-relwithdebinfo is running...
🟡 2024-08-28 08:05:40 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
14205	12828	0	7	1350	20

⚪ 2024-08-28 08:06:53 UTC Failed tests rerun (try 2) linux-x86_64-relwithdebinfo is running...
🟡 2024-08-28 08:15:40 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
28 (only retried tests)	15	0	1	0	12

⚪ 2024-08-28 08:15:48 UTC Failed tests rerun (try 3) linux-x86_64-relwithdebinfo is running...
🟢 2024-08-28 08:23:24 UTC Tests successful.

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
18 (only retried tests)	7	0	0	0	11

🟢 2024-08-28 08:23:31 UTC Build successful.
🟢 2024-08-28 08:24:08 UTC ydbd size 8.2 GiB changed* by -672 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 0628f08	merge: 33aaadd	diff	diff %
ydbd size	8 800 132 928 Bytes	8 800 132 256 Bytes	-672 Bytes	-0.000%
ydbd stripped size	479 869 288 Bytes	479 869 160 Bytes	-128 Bytes	-0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2024-08-28 07:08:51 UTC Pre-commit check for 33aaadd has started.
⚪ 2024-08-28 07:11:33 UTC Check linux-x86_64-release-asan is running...
🔴 2024-08-28 08:38:40 UTC Some tests failed, follow the links below.

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
9783	9714	0	16	27	26

🟢 2024-08-28 08:39:32 UTC Build successful.
🟢 2024-08-28 08:40:03 UTC ydbd size 5.5 GiB changed* by -848 Bytes, which is <= 0 Bytes vs main: OK

ydbd size dash	main: 0628f08	merge: 33aaadd	diff	diff %
ydbd size	5 928 957 408 Bytes	5 928 956 560 Bytes	-848 Bytes	-0.000%
ydbd stripped size	1 489 135 184 Bytes	1 489 134 928 Bytes	-256 Bytes	-0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}