SIGSEGV on dry-run with node_exporter_metrics input

[svenso]

Bug Report

Describe the bug
When running --dry-run with node_exporter_metrics input, the process SIGSEGVs

fluent-bit --dry-run -c /etc/fluent-bit/fluent-bit.conf
Fluent Bit v3.0.1
* Copyright (C) 2015-2024 The Fluent Bit Authors
* Fluent Bit is a CNCF sub-project under the umbrella of Fluentd
* https://fluentbit.io

___________.__                        __    __________.__  __          ________
\_   _____/|  |  __ __   ____   _____/  |_  \______   \__|/  |_  ___  _\_____  \
 |    __)  |  | |  |  \_/ __ \ /    \   __\  |    |  _/  \   __\ \  \/ / _(__  <
 |     \   |  |_|  |  /\  ___/|   |  \  |    |    |   \  ||  |    \   / /       \
 \___  /   |____/____/  \___  >___|  /__|    |______  /__||__|     \_/ /______  /
     \/                     \/     \/               \/                        \/

[2024/04/10 12:38:47] [ info] Configuration:
[2024/04/10 12:38:47] [ info]  flush time     | 1.000000 seconds
[2024/04/10 12:38:47] [ info]  grace          | 5 seconds
[2024/04/10 12:38:47] [ info]  daemon         | 0
[2024/04/10 12:38:47] [ info] ___________
[2024/04/10 12:38:47] [ info]  inputs:
[2024/04/10 12:38:47] [ info]      node_exporter_metrics
[2024/04/10 12:38:47] [ info] ___________
[2024/04/10 12:38:47] [ info]  filters:
[2024/04/10 12:38:47] [ info] ___________
[2024/04/10 12:38:47] [ info]  outputs:
[2024/04/10 12:38:47] [ info] ___________
[2024/04/10 12:38:47] [ info]  collectors:
configuration test is successful
[2024/04/10 12:38:47] [engine] caught signal (SIGSEGV)
#0  0x562931ef9d1e      in  flb_input_exit_all() at src/flb_input.c:1320
#1  0x562931f1617c      in  flb_engine_shutdown() at src/flb_engine.c:1121
#2  0x562931eee034      in  flb_destroy() at src/flb_lib.c:240
#3  0x562931e53772      in  flb_main() at src/fluent-bit.c:1348
#4  0x7fd50bf0ad8f      in  ???() at ???:0
#5  0x7fd50bf0ae3f      in  ???() at ???:0
#6  0x562931e51164      in  ???() at ???:0
#7  0xffffffffffffffff  in  ???() at ???:0
Aborted (core dumped)

To Reproduce

Use the following minimal config file:

[INPUT]
    name node_exporter_metrics

[SERVICE]
    flush 1
    daemon Off
    log_level trace

Run with dry-run:
fluent-bit --dry-run -c /etc/fluent-bit/fluent-bit.conf

Expected behavior
No SIGSEGV and exitcode 0
(used for validating config files in our case)

Your Environment

• Version used: 3.0.1 (and 2.2.2)
• Configuration: see "steps to reproduce"
• Environment name and version (e.g. Kubernetes? What version?): native
• Server type and version: VMWARE VM
• Operating System and version: Ubuntu 22.04.3 LTS
• Filters and plugins: none

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[github-actions]

This issue was closed because it has been stalled for 5 days with no activity.