Fix null dereference

[lll-phill-lll]

Changelog entry

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Changelog category

• Bugfix

Additional information

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[github-actions]

⚪ 2024-08-26 14:40:47 UTC Pre-commit check for 5fe0698 has started.
⚪ 2024-08-26 14:44:26 UTC Check linux-x86_64-release-asan is running...
🔴 2024-08-26 16:15:36 UTC Some tests failed, follow the links below.

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
12412	12300	0	39	55	18

🟢 2024-08-26 16:16:41 UTC Build successful.
🟡 2024-08-26 16:17:12 UTC ydbd size 5.5 GiB changed* by +378.4 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: 43019e6	merge: 5fe0698	diff	diff %
ydbd size	5 925 799 544 Bytes	5 926 187 032 Bytes	+378.4 KiB	+0.007%
ydbd stripped size	1 488 593 520 Bytes	1 488 614 288 Bytes	+20.3 KiB	+0.001%

^{*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]

⚪ 2024-08-26 14:59:52 UTC Pre-commit check for 5fe0698 has started.
⚪ 2024-08-26 15:02:37 UTC Check linux-x86_64-release-clang14 is running...
🟢 2024-08-26 15:08:24 UTC Build successful.

[github-actions]

⚪ 2024-08-26 15:01:48 UTC Pre-commit check for 5fe0698 has started.
⚪ 2024-08-26 15:04:37 UTC Check linux-x86_64-relwithdebinfo is running...
🟡 2024-08-26 16:20:22 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
74463	60745	0	14	13686	18

⚪ 2024-08-26 16:27:19 UTC Failed tests rerun (try 2) linux-x86_64-relwithdebinfo is running...
🟢 2024-08-26 16:35:08 UTC Tests successful.

Test history | Ya make output

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
40 (only retried tests)	30	0	0	0	10

🟢 2024-08-26 16:35:15 UTC Build successful.
🟡 2024-08-26 16:35:52 UTC ydbd size 8.2 GiB changed* by +781.0 KiB, which is >= 100.0 KiB vs main: Warning

ydbd size dash	main: 43019e6	merge: 5fe0698	diff	diff %
ydbd size	8 795 033 768 Bytes	8 795 833 552 Bytes	+781.0 KiB	+0.009%
ydbd stripped size	479 689 064 Bytes	479 703 208 Bytes	+13.8 KiB	+0.003%

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