ERROR: Unhandled std::length_error: basic_string::_M_replace_aux.

$ sudo thinkfan -n
[sudo] password for mparillo: 
ERROR: Unhandled std::length_error: basic_string::_M_replace_aux.
errno = No such file or directory.
Backtrace:
thinkfan(+0x37835) [0x556f9b74e835]
thinkfan(+0x205b2) [0x556f9b7375b2]
/usr/lib/libstdc++.so.6(+0xa2d3a) [0x7f3a7a74dd3a]
/usr/lib/libstdc++.so.6(+0xa2da7) [0x7f3a7a74dda7]
/usr/lib/libstdc++.so.6(+0xa304e) [0x7f3a7a74e04e]
/usr/lib/libstdc++.so.6(std::__throw_length_error(char const*)+0x45) [0x7f3a7a74455f]
/usr/lib/libstdc++.so.6(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::append(unsigned long, char)+0) [0x7f3a7a7e9ca0]
thinkfan(thinkfan::Config::try_read_config(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)+0x202) [0x556f9b73e4d2]
thinkfan(thinkfan::Config::read_config(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)+0x1a) [0x556f9b73f4da]
thinkfan(main+0x311) [0x556f9b738731]
/usr/lib/libc.so.6(__libc_start_main+0xd5) [0x7f3a7a4e9b25]
thinkfan(_start+0x2e) [0x556f9b73916e]

This is probably a bug. Please consider reporting this at https://github.com/vmatare/thinkfan/issues. Thanks.
Aborted

If it helps:

$ inxi -Fazy
System:
  Kernel: 5.11.1-arch1-1 x86_64 bits: 64 compiler: gcc v: 10.2.1 
  parameters: BOOT_IMAGE=/vmlinuz-linux 
  root=UUID=5254b91f-12c0-431c-bb4b-92f786328283 rw loglevel=3 
  Desktop: KDE Plasma 5.21.1 tk: Qt 5.15.2 wm: kwin_x11 dm: SDDM 
  Distro: Arch Linux 
Machine:
  Type: Laptop System: LENOVO product: 2522BH1 v: ThinkPad T410 
  serial: <filter> Chassis: type: 10 serial: <filter> 
  Mobo: LENOVO model: 2522BH1 serial: <filter> BIOS: LENOVO 
  v: 6IET84WW (1.44 ) date: 09/26/2012 
Battery:
  ID-1: BAT0 charge: 15.2 Wh condition: 15.2/93.2 Wh (16%) volts: 12.6/11.1 
  model: SANYO 42T4799 type: Li-ion serial: <filter> status: Full 
CPU:
  Info: Dual Core model: Intel Core i5 M 520 bits: 64 type: MT MCP 
  arch: Nehalem family: 6 model-id: 25 (37) stepping: 5 microcode: 3 
  L2 cache: 3 MiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 bogomips: 19156 
  Speed: 1436 MHz min/max: 1199/2400 MHz boost: enabled Core speeds (MHz): 
  1: 1436 2: 1403 3: 1246 4: 1463 
  Vulnerabilities: Type: itlb_multihit status: KVM: VMX unsupported 
  Type: l1tf mitigation: PTE Inversion 
  Type: mds 
  status: Vulnerable: Clear CPU buffers attempted, no microcode; SMT vulnerable 
  Type: meltdown mitigation: PTI 
  Type: spec_store_bypass status: Vulnerable 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 
  mitigation: Full generic retpoline, STIBP: disabled, RSB filling 
  Type: srbds status: Not affected 
  Type: tsx_async_abort status: Not affected 
Graphics:
  Device-1: Intel Core Processor Integrated Graphics vendor: Lenovo 
  driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0046 class ID: 0300 
  Device-2: Chicony Integrated Camera type: USB driver: uvcvideo 
  bus ID: 1-1.6:5 chip ID: 17ef:480f class ID: 0e02 
  Display: x11 server: X.Org 1.20.10 compositor: kwin_x11 driver: 
  loaded: intel unloaded: modesetting alternate: fbdev,vesa display ID: :0 
  screens: 1 
  Screen-1: 0 s-res: 1440x900 s-dpi: 96 s-size: 381x238mm (15.0x9.4") 
  s-diag: 449mm (17.7") 
  Monitor-1: LVDS1 res: 1440x900 hz: 60 dpi: 122 size: 300x190mm (11.8x7.5") 
  diag: 355mm (14") 
  Message: Unable to show advanced data. Required tool glxinfo missing. 
Audio:
  Device-1: Intel 5 Series/3400 Series High Definition Audio vendor: Lenovo 
  driver: snd_hda_intel v: kernel bus ID: 00:1b.0 chip ID: 8086:3b56 
  class ID: 0403 
  Sound Server: ALSA v: k5.11.1-arch1-1 
Network:
  Device-1: Intel 82577LM Gigabit Network vendor: Lenovo driver: e1000e 
  v: kernel port: 1820 bus ID: 00:19.0 chip ID: 8086:10ea class ID: 0200 
  IF: enp0s25 state: down mac: <filter> 
  Device-2: Intel Centrino Advanced-N 6200 driver: iwlwifi v: kernel 
  port: 1880 bus ID: 03:00.0 chip ID: 8086:4239 class ID: 0280 
  IF: wlp3s0 state: up mac: <filter> 
Bluetooth:
  Device-1: Broadcom Corp Broadcom Bluetooth Device type: USB driver: btusb 
  v: 0.8 bus ID: 1-1.4:4 chip ID: 0a5c:217f class ID: fe01 serial: <filter> 
  Message: Required tool hciconfig not installed. Check --recommends 
Drives:
  Local Storage: total: 149.05 GiB used: 28.34 GiB (19.0%) 
  SMART Message: Unable to run smartctl. Root privileges required. 
  ID-1: /dev/sda maj-min: 8:0 vendor: Hitachi model: HTS725016A9A364 
  size: 149.05 GiB block size: physical: 512 B logical: 512 B speed: 3.0 Gb/s 
  rotation: 7200 rpm serial: <filter> rev: C70F scheme: MBR 
Partition:
  ID-1: / raw size: 148.34 GiB size: 145.01 GiB (97.76%) 
  used: 28.27 GiB (19.5%) fs: ext4 dev: /dev/sda2 maj-min: 8:2 
  ID-2: /boot raw size: 212 MiB size: 201.3 MiB (94.95%) 
  used: 72.8 MiB (36.2%) fs: ext4 dev: /dev/sda1 maj-min: 8:1 
Swap:
  Kernel: swappiness: 60 (default) cache pressure: 100 (default) 
  ID-1: swap-1 type: partition size: 512 MiB used: 0 KiB (0.0%) priority: -2 
  dev: /dev/sda3 maj-min: 8:3 
Sensors:
  System Temperatures: cpu: 55.0 C mobo: 0.0 C 
  Fan Speeds (RPM): cpu: 3685 
Info:
  Processes: 172 Uptime: 5h 24m wakeups: 1 Memory: 3.64 GiB 
  used: 1.58 GiB (43.3%) Init: systemd v: 247 Compilers: gcc: 10.2.0 
  clang: 11.1.0 Packages: pacman: 892 lib: 194 Shell: Bash v: 5.1.4 
  running in: konsole inxi: 3.3.01

funny how i have this exact same issue thinkfan config file

##############################################################################
# thinkfan Example Config File
# ============================
#
# Please read the config manpage thinkfan.conf(5) before playing around with
# this.
#
# This is NOT a working config file that can just be copied. It is only meant
# to give a rough idea what can be done. In particular, don't copy & paste the
# fan speed config! Think about what you're doing.
#
# If you don't know what temperatures are right for your system, you should
# not be using thinkfan!
##############################################################################

##############################################################################
# Sensor Drivers and Temperature Inputs
# =====================================
#
# ATTENTION: The order in which sensors are specified here is significant when
# specifying the fan speeds further below!
#
# There are multiple ways in which a temperature input can be specified. An
# example for each is given below.
#
# The "correction:" and "optional:" keywords may be specified on any type of
# sensor.

sensors:
  # LM Sensors
  # ==========
  # Temperatures can be read directly from Linux drivers through the LM sensors.
  #
  # To configure this, install "lm-sensors" and "libsensors", then
  # run "sensors-detect", then run "sensors".
  # To build thinkfan from sources, you'll also need to install "libsensors-dev"
  # or equivalent package for your distribution.
  #
  # For example, the following output of "sensors":
  # ...
  # thinkpad-isa-0000
  # Adapter: ISA adapter
  # fan1:        2618 RPM
  # fan2:        2553 RPM
  # CPU:          +63.0 C
  # GPU 1:        +55.0 C
  # temp3:        +68.0 C
  # temp4:         +0.0 C
  # temp5:        +60.0 C
  # temp6:        +64.0 C
  # temp7:        +67.0 C
  # temp8:         +0.0 C
  # ...
  # would result in the following configuration:
  - chip: thinkpad-isa-0000
    ids: [ CPU, "GPU 1", temp3, temp4, temp5, temp6, temp7, temp8 ]

  # hwmon: Full path to a temperature file (single sensor).
  # =======================================================
  # Disadvantage is that the index in "hwmon0" depends on the load order of
  # the driver modules, which may change across bootups on some systems.
  - hwmon: /sys/class/hwmon/hwmon0/temp1_input

  # hwmon: Path to a complete driver folder
  # =======================================
  # Individual sensors need to be picked out with the "indices:" keyword.
  # This can be used with a stable path that does not depend on driver load
  # order. However certain drivers may not appear under such a stable path.
  - hwmon: /sys/devices/pci0000:00/0000:00:03.1/0000:27:00.0/hwmon
    indices: [1, 2, 5, 6] # adds 4 temperature sensors
    correction: [0, 0, 0, -5] # add -5 °C to temp6_input

  # hwmon: Base path with name-based search
  # =======================================
  # Thinkfan will search under the given path for a hwmon driver that has a
  # file called "name" which contains the given name. This method should work
  # with all hwmon drivers and is robust against driver load order.
  - hwmon: /sys/class/hwmon
    name: k10temp
    indices: [1]

  # Sensors can also be optional, e.g. in case of removable hardware
  - hwmon: /sys/class/block/sdc/device/hwmon
    indices: [1]
    optional: true # don't exit if the sensor can't be read

  # atasmart: Read the temperature from a hard disk via S.M.A.R.T
  # =============================================================
  # Note that this is unreasonably CPU-intensive. Since Linux 5.6, the kernel
  # can report the temperatures of hard disks via the hwmon interface (see the
  # example above), which should be preferred if available.
  #
  # This is only available if thinkfan was compiled with USE_ATASMART enabled.
  - atasmart: /dev/sda

  # tpacpi: Legacy interface to the thinkpad_acpi driver
  # ====================================================
  # Particularly on older Thinkpad laptops, this interface may give access to
  # 8-16 temperature sensors, but it may be hard to tell where/what exactly
  # they measure.
  # Some documentation for older models may be found at the thinkpad wiki:
  # https://www.thinkwiki.org/wiki/Thermal_Sensors
  #
  # Note that the hwmon interface is to be preferred nowadays.
  - tpacpi: /proc/acpi/ibm/thermal
    # Some of the temperature entries in /proc/acpi/ibm/thermal may be
    # irrelevant or unused, so individual ones can be selected:
    indices: [1, 2, 3, 4]

  # nvml: The proprietary nVidia driver
  # ===================================
  # Temperatures can be read directly from nVidia GPUs that run with the
  # proprietary driver. The "nvml:" entry must specify the PCI bus ID of the
  # GPU (can be found with lspci)
  #
  # Note that this does not work with the open-source "nouveau" driver. Open
  # source drivers should support the hwmon interface instead (see above).
  - nvml: 27:00.0

##############################################################################

##############################################################################
# Fan Drivers
# ===========
#
# Currently, thinkfan supports only one fan, but support for multiple fans is
# in development and will be released soon. For the time being, the examples
# given below are mutually exclusive.
#
fans:
  # hwmon: Full path to a PWM file
  # ==============================
  # Also subject to the potential problem with driver load order (see above)
  - hwmon: /sys/class/hwmon/hwmon0/pwm1

  # hwmon: Path to a complete driver folder
  # =======================================
  - hwmon: /sys/class/graphics/fb0/device/hwmon
    indices: [1] # Use pwm1

  # hwmon: Base path with name-based search
  # =======================================
  - hwmon: /sys/class/hwmon
    name: amdgpu
    indices: [1]

  # tpacpi: Thinkpad-specific fan interface
  # =======================================
  # Currently, this is the only way to use disengaged and automatic mode on
  # thinkpads.
  - tpacpi: /proc/acpi/ibm/fan

##############################################################################

##############################################################################
# Fan Speeds (simple mode)
# ========================
#
# In simple mode, each entry is a [FANSPEED, LOWER_LIMIT, UPPER_LIMIT] tuple.
# This is a quick way to configure a small system like a laptop, where the
# temperature ratings for all monitored devices are similar. Only the highest
# temperature found across all sensors will be compared against these limits.
# All other temperatures are ignored.
#
# Correction values on individual sensors (see above) may be used to equalize
# small discrepancies in temperature ratings.
#
# The FANSPEED values in this example are valid for the thinkpad_acpi fan
# driver only (see above)
#
levels:
  - [0, 0, 50]
  - ["level auto", 45, 75]
  - ["level disengaged", 70, 255]

##############################################################################

##############################################################################
# Fan Speeds (detailed mode)
# ==========================
#
# It is generally advisable to configure the temperature limits for each
# sensor individually.
#
# The speed values used here range from 0 to 255, which is valid for the PWM
# control files used by hwmon-based drivers.
#
# The temperatures specified in upper_limit and lower_limit apply to the
# sensors in the same order in which they were specified in the "sensors:"
# section above, and their length must match the total number of sensors that
# have been configured.
#
levels:
  - speed: 0
    upper_limit: [50, 50, 50]

  - speed: 100
    lower_limit: [45, 45, 45]
    upper_limit: [65, 65, 65]

  - speed: 255
    lower_limit: [60, 60, 60]

##############################################################################

stacktrace

           PID: 9045 (thinkfan)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 6 (ABRT)
     Timestamp: Thu 2023-10-05 16:26:10 GMT (15s ago)
  Command Line: thinkfan -n
    Executable: /usr/bin/thinkfan
 Control Group: /user.slice/user-1000.slice/session-c1.scope
          Unit: session-c1.scope
         Slice: user-1000.slice
       Session: c1
     Owner UID: 1000 (tomas)
       Boot ID: 00342585409a476a8eafc44047d0b717
    Machine ID: 68290eca0c1e4744af7eb3b05fb55e38
      Hostname: protogen
       Storage: none
       Message: Process 9045 (thinkfan) of user 0 dumped core.

Coredump entry has no core attached (neither internally in the journal nor externally on disk).

then this

System:
  Kernel: 6.5.5-arch1-1 arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
    clocksource: tsc available: acpi_pm parameters: BOOT_IMAGE=/vmlinuz-linux
    root=UUID=4408af61-0474-4425-a0aa-2698c6963a3c rw loglevel=3 quiet
  Desktop: i3 v: 4.22 info: i3bar vt: 2 dm: N/A Distro: Arch Linux
Machine:
  Type: Laptop System: LENOVO product: 20S1S95G00 v: ThinkPad T14 Gen 1
    serial: <superuser required> Chassis: type: 10 serial: <superuser required>
  Mobo: LENOVO model: 20S1S95G00 v: SDK0J40697 WIN
    serial: <superuser required> UEFI: LENOVO v: N2XET38W (1.28 )
    date: 01/18/2023
Battery:
  ID-1: BAT0 charge: 35.5 Wh (83.7%) condition: 42.4/50.5 Wh (84.0%)
    power: 6.9 W volts: 12.0 min: 11.6 model: LGC 5B10W13905 type: Li-poly
    serial: <filter> status: discharging cycles: 225
CPU:
  Info: model: Intel Core i5-10310U bits: 64 type: MT MCP
    arch: Comet/Whiskey Lake note: check gen: core 10 level: v3 note: check
    built: 2018 process: Intel 14nm family: 6 model-id: 0x8E (142)
    stepping: 0xC (12) microcode: 0xF0
  Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
    L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB
    L3: 6 MiB desc: 1x6 MiB
  Speed (MHz): avg: 602 high: 766 min/max: 400/4400 scaling:
    driver: intel_pstate governor: powersave cores: 1: 754 2: 700 3: 766 4: 400
    5: 400 6: 400 7: 700 8: 702 bogomips: 35210
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
  Vulnerabilities:
  Type: gather_data_sampling status: Vulnerable: No microcode
  Type: itlb_multihit status: KVM: VMX disabled
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: mmio_stale_data mitigation: Clear CPU buffers; SMT vulnerable
  Type: retbleed mitigation: Enhanced IBRS
  Type: spec_rstack_overflow status: Not affected
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: Enhanced / Automatic IBRS, IBPB: conditional,
    RSB filling, PBRSB-eIBRS: SW sequence
  Type: srbds mitigation: Microcode
  Type: tsx_async_abort mitigation: TSX disabled
Graphics:
  Device-1: Intel CometLake-U GT2 [UHD Graphics] vendor: Lenovo driver: i915
    v: kernel arch: Gen-9.5 process: Intel 14nm built: 2016-20 ports:
    active: eDP-1 empty: DP-1, DP-2, HDMI-A-1, HDMI-A-2 bus-ID: 00:02.0
    chip-ID: 8086:9b41 class-ID: 0300
  Device-2: 8SSC20F27068L1GZ071DEBS Integrated Camera driver: uvcvideo
    type: USB rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-8:2
    chip-ID: 04ca:7070 class-ID: 0e02
  Display: x11 server: X.Org v: 21.1.8 driver: X: loaded: intel
    unloaded: modesetting alternate: fbdev,vesa dri: iris gpu: i915
    display-ID: :1 screens: 1
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.00x11.22")
    s-diag: 582mm (22.93")
  Monitor-1: eDP-1 mapped: eDP1 model: BOE Display 0x07c9 built: 2018
    res: 1920x1080 hz: 60 dpi: 163 gamma: 1.2 size: 300x170mm (11.81x6.69")
    diag: 345mm (13.6") ratio: 16:9 modes: 1920x1080
  API: OpenGL Message: Unable to show GL data. glxinfo is missing.
Audio:
  Device-1: Intel Comet Lake PCH-LP cAVS vendor: Lenovo
    driver: sof-audio-pci-intel-cnl alternate: snd_hda_intel, snd_soc_skl,
    snd_sof_pci_intel_cnl bus-ID: 00:1f.3 chip-ID: 8086:02c8 class-ID: 0403
  API: ALSA v: k6.5.5-arch1-1 status: kernel-api
    tools: alsactl,alsamixer,amixer
  Server-1: JACK v: 1.9.22 status: off tools: N/A
  Server-2: PulseAudio v: 16.1 status: active with: pulseaudio-alsa
    type: plugin tools: pacat,pactl,pavucontrol
Network:
  Device-1: Intel Comet Lake PCH-LP CNVi WiFi driver: iwlwifi v: kernel
    bus-ID: 00:14.3 chip-ID: 8086:02f0 class-ID: 0280
  IF: wlan0 state: up mac: <filter>
  Device-2: Intel Ethernet I219-LM vendor: Lenovo driver: e1000e v: kernel
    port: N/A bus-ID: 00:1f.6 chip-ID: 8086:0d4e class-ID: 0200
  IF: enp0s31f6 state: down mac: <filter>
Bluetooth:
  Device-1: N/A driver: btusb v: 0.8 type: USB rev: 2.0 speed: 12 Mb/s lanes: 1
    mode: 1.1 bus-ID: 1-10:3 chip-ID: 8087:0026 class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 1 state: down bt-service: not found
    rfk-block: hardware: no software: no address: see --recommends
Drives:
  Local Storage: total: 267.35 GiB used: 6.24 GiB (2.3%)
  SMART Message: Required tool smartctl not installed. Check --recommends
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung model: MZVLB256HBHQ-000L7
    size: 238.47 GiB block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s
    lanes: 4 tech: SSD serial: <filter> fw-rev: 5M2QEXH7 temp: 35.9 C
    scheme: GPT
  ID-2: /dev/sda maj-min: 8:0 vendor: Kingston model: DataTraveler 3.0
    size: 28.88 GiB block-size: physical: 512 B logical: 512 B type: USB rev: 3.2
    spd: 5 Gb/s lanes: 1 mode: 3.2 gen-1x1 tech: N/A serial: <filter>
    fw-rev: PMAP scheme: MBR
Partition:
  ID-1: / raw-size: 221.97 GiB size: 217.43 GiB (97.95%) used: 6.14 GiB (2.8%)
    fs: ext4 dev: /dev/nvme0n1p3 maj-min: 259:3
  ID-2: /boot raw-size: 512 MiB size: 511 MiB (99.80%)
    used: 111.6 MiB (21.8%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default) zswap: yes
    compressor: zstd max-pool: 20%
  ID-1: swap-1 type: partition size: 16 GiB used: 0 KiB (0.0%) priority: -2
    dev: /dev/nvme0n1p2 maj-min: 259:2
Sensors:
  System Temperatures: cpu: 44.0 C pch: 49.0 C mobo: N/A
  Fan Speeds (rpm): fan-1: 0
Info:
  Processes: 197 Uptime: 57m wakeups: 3 Memory: total: 16 GiB note: est.
  available: 15.26 GiB used: 1.85 GiB (12.1%) Init: systemd v: 254
  default: graphical tool: systemctl Compilers: gcc: 13.2.1 Packages:
  pm: pacman pkgs: 481 libs: 143 tools: yay Shell: Zsh v: 5.9
  running-in: alacritty inxi: 3.3.30

vmatare / thinkfan

ERROR: Unhandled std::length_error: basic_string::_M_replace_aux. #128