Error deleting file at close systemd and sigsegv after that

## Bug Report

**Describe the bug**

**To Reproduce**

- Example log message if applicable:
```
root@xxx:/home/# fluent-bit -c /run/fluent-bit.conf
Fluent Bit v4.2.2
* Copyright (C) 2015-2025 The Fluent Bit Authors
* Fluent Bit is a CNCF graduated project under the Fluent organization
* https://fluentbit.io

______ _ _ ______ _ _ ___ _____
| ___| | | | | ___ (_) | / | / __ \
| |_ | |_ _ ___ _ __ | |_ | |_/ /_| |_ __ __/ /| | `' / /'
| _| | | | | |/ _ \ '_ \| __| | ___ \ | __| \ \ / / /_| | / /
| | | | |_| | __/ | | | |_ | |_/ / | |_ \ V /\___ |_./ /___
\_| |_|\__,_|\___|_| |_|\__| \____/|_|\__| \_/ |_(_)_____/

Fluent Bit v4.2 – Direct Routes Ahead
Celebrating 10 Years of Open, Fluent Innovation!

[2026/02/03 18:53:29.384833750] [ info] Configuration:
[2026/02/03 18:53:29.385184752] [ info] flush time | 10.000000 seconds
[2026/02/03 18:53:29.385240086] [ info] grace | 10 seconds
[2026/02/03 18:53:29.385271086] [ info] daemon | 0
[2026/02/03 18:53:29.385298086] [ info] ___________
[2026/02/03 18:53:29.385323753] [ info] inputs:
[2026/02/03 18:53:29.385351420] [ info] systemd
[2026/02/03 18:53:29.385377087] [ info] ___________
[2026/02/03 18:53:29.385403420] [ info] filters:
[2026/02/03 18:53:29.385430421] [ info] ___________
[2026/02/03 18:53:29.385454421] [ info] outputs:
[2026/02/03 18:53:29.385479088] [ info] http.0
[2026/02/03 18:53:29.385503088] [ info] ___________
[2026/02/03 18:53:29.385528088] [ info] collectors:
[2026/02/03 18:53:29.387421768] [ info] [fluent bit] version=4.2.2, commit=ddfef360d7, pid=12723
[2026/02/03 18:53:29.387523436] [debug] [engine] coroutine stack size: 24576 bytes (24.0K)
[2026/02/03 18:53:29.388913779] [ info] [storage] ver=1.5.4, type=memory+filesystem, sync=full, checksum=off, max_chunks_up=10
[2026/02/03 18:53:29.389012113] [ info] [storage] backlog input plugin: storage_backlog.1
[2026/02/03 18:53:29.389071114] [ info] [simd ] disabled
[2026/02/03 18:53:29.389130114] [ info] [cmetrics] version=1.0.6
[2026/02/03 18:53:29.389282449] [ info] [ctraces ] version=0.6.6
[2026/02/03 18:53:29.389998454] [ info] [input:systemd:systemd.0] initializing
[2026/02/03 18:53:29.390075455] [ info] [input:systemd:systemd.0] storage_strategy='filesystem' (memory + filesystem)
[2026/02/03 18:53:29.390204789] [debug] [systemd:systemd.0] created event channels: read=25 write=26
[2026/02/03 18:53:29.397409841] [ info] [input:systemd:systemd.0] seek_cursor=s=12ecf56bc03c4cb78e8eba87d0b968d5;i=48a... OK
[2026/02/03 18:53:29.420957013] [debug] [input:systemd:systemd.0] sd_journal library may truncate values to sd_journal_get_data_threshold() bytes: 65536
[2026/02/03 18:53:29.421400683] [ info] [input:storage_backlog:storage_backlog.1] initializing
[2026/02/03 18:53:29.421475350] [ info] [input:storage_backlog:storage_backlog.1] storage_strategy='memory' (memory only)
[2026/02/03 18:53:29.421638685] [debug] [storage_backlog:storage_backlog.1] created event channels: read=34 write=35
[2026/02/03 18:53:29.421911020] [ info] [input:storage_backlog:storage_backlog.1] queue memory limit: 28.6M
[2026/02/03 18:53:29.422074355] [debug] [http:logs_output] created event channels: read=36 write=37
[2026/02/03 18:53:29.424260371] [ info] [output:http:logs_output] worker #0 started
[2026/02/03 18:53:29.424976042] [debug] [router] match rule systemd.0:http.0
[2026/02/03 18:53:29.425085043] [debug] [router] match rule storage_backlog.1:http.0
[2026/02/03 18:53:29.426157051] [ info] [output:http:logs_output] worker #1 started
[2026/02/03 18:53:29.429124073] [ info] [http_server] listen iface=127.0.0.1 tcp_port=2020
[2026/02/03 18:53:29.429396408] [ info] [sp] stream processor started
[2026/02/03 18:53:29.429754411] [ info] [engine] Shutdown Grace Period=10, Shutdown Input Grace Period=5
[2026/02/03 18:53:38.719480900] [debug] [task] created task=0x75d5b6f8 id=0 OK
[2026/02/03 18:53:38.759388858] [debug] [task] created task=0x75d5f930 id=1 OK
[2026/02/03 18:53:38.763989891] [debug] [task] created task=0x75d5a548 id=2 OK
[2026/02/03 18:53:38.764499229] [debug] [task] created task=0x75d5e868 id=3 OK
[2026/02/03 18:53:38.765052233] [debug] [task] created task=0x75d5f5a0 id=4 OK
[2026/02/03 18:53:38.765575236] [debug] [task] created task=0x75d4a120 id=5 OK
[2026/02/03 18:53:38.765654570] [debug] [output:http:logs_output] task_id=0 assigned to thread #0
[2026/02/03 18:53:38.765885905] [debug] [output:http:logs_output] task_id=1 assigned to thread #1
[2026/02/03 18:53:38.767138914] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.773962964] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.765967239] [debug] [output:http:logs_output] task_id=2 assigned to thread #0
[2026/02/03 18:53:38.767242249] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774093965] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.766044573] [debug] [output:http:logs_output] task_id=3 assigned to thread #1
[2026/02/03 18:53:38.767314582] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774197633] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.766104907] [debug] [output:http:logs_output] task_id=4 assigned to thread #0
[2026/02/03 18:53:38.767373583] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774285300] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.766162574] [debug] [output:http:logs_output] task_id=5 assigned to thread #1
[2026/02/03 18:53:38.767431917] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774372634] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767485250] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774457968] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767541917] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774553969] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767597251] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774634636] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767658585] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774726637] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767713585] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774809971] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767768586] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.774905305] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767819586] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.775010972] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767876587] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.775119973] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.767922254] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.775227640] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.775532309] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.776014646] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.776153647] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.776290981] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.776395982] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.776502650] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.776595984] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.776871319] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.776995653] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.777075654] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.777165988] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.777250322] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.777341656] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.777426656] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.780928682] [debug] [upstream] KA connection #90 to 192.168.0.53:8000 is connected
[2026/02/03 18:53:38.788773406] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.791108423] [debug] [http_client] not using http_proxy for header
[2026/02/03 18:53:38.789082408] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.792078430] [debug] [upstream] KA connection #92 to 192.168.0.53:8000 is connected
[2026/02/03 18:53:38.789199742] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.789303743] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.789417077] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.789524411] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.789633079] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.789742746] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.789849747] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.789953081] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.790042749] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.790148416] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.790256417] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.790356751] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.793915443] [debug] [upstream] KA connection #91 to 192.168.0.53:8000 is connected
[2026/02/03 18:53:38.799956154] [debug] [http_client] not using http_proxy for header
[2026/02/03 18:53:38.801653833] [debug] [http_client] not using http_proxy for header
[2026/02/03 18:53:38.802215837] [debug] [upstream] KA connection #93 to 192.168.0.53:8000 is connected
[2026/02/03 18:53:38.804927524] [ info] [output:http:logs_output] 192.168.0.53:8000, HTTP status=200
OK
[2026/02/03 18:53:38.805096192] [debug] [upstream] KA connection #90 to 192.168.0.53:8000 is now available
[2026/02/03 18:53:38.805296860] [ info] [output:http:logs_output] 192.168.0.53:8000, HTTP status=200
OK
[2026/02/03 18:53:38.805449861] [debug] [upstream] KA connection #92 to 192.168.0.53:8000 is now available
[2026/02/03 18:53:38.805555195] [debug] [upstream] KA connection #90 to 192.168.0.53:8000 has been disconnected by the remote service
[2026/02/03 18:53:38.805878864] [debug] [upstream] KA connection #92 to 192.168.0.53:8000 has been disconnected by the remote service
[2026/02/03 18:53:38.807071540] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807138873] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807205207] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807256208] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807307541] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807346208] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.812046576] [debug] [task] destroy task=0x75d5b6f8 (task_id=0)
[2026/02/03 18:53:38.807394209] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.812126577] [debug] [input chunk] remove chunk 12723-1770144809. 0.flb with 495616 bytes from plugin http.0, the updated fs_chunks_size is 2199552 bytes
[2026/02/03 18:53:38.807446542] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807495876] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807539543] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.812391245] [debug] [http_client] not using http_proxy for header
[2026/02/03 18:53:38.807587543] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807633210] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807681211] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.807724878] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.810191896] [debug] [out flush] cb_destroy coro_id=0
[2026/02/03 18:53:38.810272230] [debug] [out flush] cb_destroy coro_id=1
[2026/02/03 18:53:38.812875582] [ info] [output:http:logs_output] 192.168.0.53:8000, HTTP status=200
OK
[2026/02/03 18:53:38.813031583] [debug] [upstream] KA connection #91 to 192.168.0.53:8000 is now available
[2026/02/03 18:53:38.813143584] [debug] [upstream] KA connection #91 to 192.168.0.53:8000 has been disconnected by the remote service
[2026/02/03 18:53:38.814771929] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.814860930] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.814923264] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.814970597] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815014264] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815056265] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815106265] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815150599] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815194599] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815236933] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815279266] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815322267] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815365267] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[2026/02/03 18:53:38.815407267] [ warn] [pack] Invalid UTF-8 bytes found, skipping.
[/usr/src/debug/fluentbit/4.2.2/lib/chunkio/src/cio_file_unix.c:469 errno=2] No such file or directory
[2026/02/03 18:53:38.818386622] [debug] [task] destroy task=0x75d5a548 (task_id=2)
[2026/02/03 18:53:38.818516957] [debug] [input chunk] remove chunk 12723-1770144809. 0.flb with 495616 bytes from plugin http.0, the updated fs_chunks_size is 1703936 bytes
[2026/02/03 18:53:38.819082627] [ info] [output:http:logs_output] 192.168.0.53:8000, HTTP status=200
OK
[2026/02/03 18:53:38.819250629] [error] [storage] [cio file] error deleting file at close systemd.0:12723-1770144809. 0.flb
[2026/02/03 18:53:38.819262629] [debug] [upstream] KA connection #93 to 192.168.0.53:8000 is now available
[2026/02/03 18:53:38.819373296] [debug] [upstream] KA connection #93 to 192.168.0.53:8000 has been disconnected by the remote service
[2026/02/03 18:53:38.819655632] [debug] [out flush] cb_destroy coro_id=0
[2026/02/03 18:53:38.819736632] [debug] [out flush] cb_destroy coro_id=1
[2026/02/03 18:53:38.821379977] [debug] [task] destroy task=0x75d5f930 (task_id=1)
[2026/02/03 18:53:38.821013975] [debug] [upstream] KA connection #80 to 192.168.0.53:8000 is connected
[2026/02/03 18:53:38.821459311] [debug] [input chunk] remove chunk 12723-1770144809. 0.flb with 495616 bytes from plugin http.0, the updated fs_chunks_size is 1208320 bytes
[/usr/src/debug/fluentbit/4.2.2/lib/chunkio/src/cio_file_unix.c:469 errno=2] No such file or directory
[/usr/src/debug/fluentbit/4.2.2/lib/chunkio/src/cio_file_unix.c:469 errno=2] No such file or directory
[2026/02/03 18:53:38.822946322] [error] [storage] [cio file] error deleting file at close systemd.0:12723-1770144809. 0.flb
[2026/02/03 18:53:38.823381325] [debug] [http_client] not using http_proxy for header
[2026/02/03 18:53:38.823126324] [debug] [task] destroy task=0x75d5e868 (task_id=3)
[2026/02/03 18:53:38.823880329] [debug] [upstream] KA connection #88 to 192.168.0.53:8000 is connected
[2026/02/03 18:53:38.823188991] [debug] [input chunk] remove chunk 12723-1770144809. 0.flb with 495616 bytes from plugin http.0, the updated fs_chunks_size is 712704 bytes
[2026/02/03 18:53:38.824714335] [error] [storage] [cio file] error deleting file at close systemd.0:12723-1770144809. 0.flb
[2026/02/03 18:53:38.827498356] [debug] [http_client] not using http_proxy for header
[2026/02/03 18:53:38.834168738] [ info] [output:http:logs_output] 192.168.0.53:8000, HTTP status=200
OK
[/usr/src/debug/fluentbit/4.2.2/lib/chunkio/src/cio_file_unix.c:469 errno=2] No such file or directory
[2026/02/03 18:53:38.834529407] [ info] [output:http:logs_output] 192.168.0.53:8000, HTTP status=200
OK
[2026/02/03 18:53:38.834366406] [debug] [upstream] KA connection #88 to 192.168.0.53:8000 is now available
[2026/02/03 18:53:38.834902410] [debug] [upstream] KA connection #80 to 192.168.0.53:8000 is now available
[2026/02/03 18:53:38.835256746] [debug] [task] destroy task=0x75d5f5a0 (task_id=4)
[2026/02/03 18:53:38.834490740] [debug] [upstream] KA connection #88 to 192.168.0.53:8000 has been disconnected by the remote service
[2026/02/03 18:53:38.835029077] [debug] [upstream] KA connection #80 to 192.168.0.53:8000 has been disconnected by the remote service
[2026/02/03 18:53:38.835336746] [debug] [input chunk] remove chunk 12723-1770144809. 0.flb with 495616 bytes from plugin http.0, the updated fs_chunks_size is 217088 bytes
[2026/02/03 18:53:38.834759409] [debug] [out flush] cb_destroy coro_id=2
[2026/02/03 18:53:38.835316079] [debug] [out flush] cb_destroy coro_id=2
[2026/02/03 18:53:38.836497755] [error] [storage] [cio file] error deleting file at close systemd.0:12723-1770144809. 0.flb
[2026/02/03 18:53:38.836726423] [debug] [task] destroy task=0x75d4a120 (task_id=5)
[2026/02/03 18:53:38.836826424] [debug] [input chunk] remove chunk 12723-1770144809. 0.flb with 495616 bytes from plugin http.0, the updated fs_chunks_size is -278528 bytes
[/usr/src/debug/fluentbit/4.2.2/lib/chunkio/src/cio_file_unix.c:469 errno=2] No such file or directory
[2026/02/03 18:53:38.838152767] [error] [storage] [cio file] error deleting file at close systemd.0:12723-1770144809. 0.flb
[2026/02/03 18:53:38.870003999] [debug] [input chunk] drop chunk 12723-1770144818. 0.flb with no output route from input plugin systemd.0
[2026/02/03 18:53:38.899597216] [debug] [input chunk] drop chunk 12723-1770144818. 0.flb with no output route from input plugin systemd.0
[2026/02/03 18:53:38.910583629] [debug] [input chunk] drop chunk 12723-1770144818. 0.flb with no output route from input plugin systemd.0
[2026/02/03 18:53:38.928538760] [debug] [input chunk] drop chunk 12723-1770144818. 0.flb with no output route from input plugin systemd.0
[2026/02/03 18:53:38.947222230] [debug] [input chunk] drop chunk 12723-1770144818. 0.flb with no output route from input plugin systemd.0
[2026/02/03 18:53:38.963800685] [debug] [input chunk] drop chunk 12723-1770144818. 0.flb with no output route from input plugin systemd.0
[2026/02/03 18:53:39.3420308] [debug] [input chunk] drop chunk 12723-1770144818. 0.flb with no output route from input plugin systemd.0
[/usr/src/debug/fluentbit/4.2.2/lib/chunkio/src/cio_file_unix.c:469 errno=2] No such file or directory
[2026/02/03 18:53:39.17755412] [error] [storage] [cio file] error deleting file at close systemd.0:12723-1770144818. 0.flb
[2026/02/03 18:53:39.135337272] [error] [input chunk] fail to drop enough chunks in order to place new data coming from input plugin systemd.0
[2026/02/03 18:53:39.136367946] [error] [input chunk] no available chunk
[2026/02/03 18:53:39.137910624] [debug] [input chunk] drop chunk 12723-1770144819. 0.flb with no output route from input plugin systemd.0
[2026/02/03 18:53:39] [engine] caught signal (SIGSEGV)
Aborted (core dumped)
```

- Steps to reproduce the problem:
I don't know how to reproduce it every time. This problem only occurs on ARM architecture when I start printing a lot of logs in journald and break the connection to the backend for a few minutes and then re-establish it. Sometimes I need to restart fluentbit to see the error.

**Expected behavior**
No SIGSEGV

**Screenshots**

**Your Environment**

* Version used: 4.2.2

/usr/bin/fluent-bit: ELF 32-bit LSB pie executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /usr/lib/ld-linux-armhf.so.3, BuildID[sha1]=c68b8fc4a5cec12c3556e07866f0d72443c31c9e, for GNU/Linux 5.15.0, with debug_info, not stripped

* Configuration:
```
[SERVICE]
parsers_file /etc/fluent-bit/parsers.conf
flush 10
Daemon Off
Grace 10
Log_Level debug
HTTP_Server On
HTTP_Listen 127.0.0.1
HTTP_PORT 2020
metrics On
storage.path /var/log/fluentbit-buffers/
storage.sync full
storage.max_chunks_up 2
storage.backlog.mem_limit 30MB

# Reads charger logs
[INPUT]
name systemd
Mem_Buf_Limit 100MB
storage.type filesystem
DB /home/xxx/fluent-bit/journald-index-charger.sqlite
tag *

[OUTPUT]
uri /
Name http
Alias logs_output
format json
compress gzip
json_date_key t
json_date_format iso8601
header_tag tag
match_regex [^_]+
host 192.168.0.53
port 8000
Retry_Limit False
storage.total_limit_size 1GB

```
* Environment name and version (e.g. Kubernetes? What version?):
* Server type and version:
* Operating System and version: Linux with kernel 6.6.52-lts armv7l
* Filters and plugins: systemd

**Additional context**
I am able to see that issue only when storage.type is set to filesystem