Crash when loading steamclient.so for Don't Starve Together Dedicated Server on Box64 (ARM: Cortex-A520) - futex robust_list error

[blackcat496]

Hello everyone,
I'm having an issue running the Don't Starve Together dedicated server on an ARM device (Cortex‑A520) via Box64 and would like some help from the community.

My setup

• Box64 version: v0.4.1 (0414fad)
• Environment: Tested on native Termux and Proot‑Distro
• Target program: dontstarvededicatedservernullrendererx64 (x64 binary)

Problem description
In Proot‑Distro, when Box64 successfully loads steamclient.so (from the server's ./lib64/ directory), the server immediately crashes with the following error:

[BOX64] Using emulated /root/Don_t_Starve_Together_Dedicated_Server/bin64/lib64/steamclient.so
[S_API] SteamAPI_Init(): Loaded local 'steamclient.so' OK.
IPC function call IClientUtils::GetSteamRealm took too long: 400 msec
Fatal error: futex robust_list not initialized by pthreads
[BOX64] 22310|SIGSEGV @0x3000e2d1bc (???(./dontstarve_dedicated_server_nullrenderer_x64+0xe2d1bc)) (x64pc=0x3f08cb94e5/"/root/Don_t_Starve_Together_Dedicated_Server/bin64/lib64/steamclient.so + 0x1cb94e5", rsp=0x7172cb87c0), for accessing (nil) (code=1)
RAX:0x0000000000000001 RCX:0xffffffffffffffff RDX:0x0000007172cb72f0 RBX:0x0000000060000018
RSP:0x0000007172cb87c0 RBP:0x0000000000000000 RSI:0x0000000000000000 RDI:0x0000003f09b50200
 R8:0x0000003f07c53a53  R9:0x0000007172cb86e8 R10:0x0000003f07c53a53 R11:0x0000000000000087
R12:0x0000007172cb8840 R13:0x000000716800ed98 R14:0x0000000060000018 R15:0x0000007168127918 ES:0x002b CS:0x0033 SS:0x002b DS:0x002b FS:0x0000 GS:0x0000 FSBASE=0x71680108e0 GSBASE=(nil)

Segmentation fault

In Termux, the crash is also preceded by an SSL certificate error:

[BOX64] Using emulated /data/data/com.termux/files/home/Don_t_Starve_Together_Dedicated_Server/bin64/lib64/steamclient.so
[S_API] SteamAPI_Init(): Loaded local 'steamclient.so' OK.
src/common/opensslconnection.cpp (1636) : unable to load trusted SSL root certificates
src/common/opensslconnection.cpp (1636) : unable to load trusted SSL root certificates
Fatal error: futex robust_list not initialized by pthreads
[BOX64] 20264|SIGSEGV @0x77a75cd1bc (???(./dontstarve_dedicated_server_nullrenderer_x64+0xe2d1bc)) (x64pc=0x3f08cb94e5/"/data/data/com.termux/files/home/Don_t_Starve_Together_Dedicated_Server/bin64/lib64/steamclient.so + 0x1cb94e5", rsp=0x77a42167c0), for accessing (nil) (code=1)
RAX:0x0000000000000001 RCX:0xffffffffffffffff RDX:0x00000077a42152f0 RBX:0x0000000060000018
RSP:0x00000077a42167c0 RBP:0x0000000000000000 RSI:0x0000000000000000 RDI:0x0000003f09b50200
 R8:0x0000003f07c53a53  R9:0x00000077a42166e8 R10:0x0000003f07c53a53 R11:0x0000000000000087
R12:0x00000077a4216840 R13:0x000000779000f028 R14:0x0000000060000018 R15:0x0000007790055188 ES:0x002b CS:0x0033 SS:0x002b DS:0x002b FS:0x0000 GS:0x0000 FSBASE=0x7790010b70 GSBASE=(nil)

Segmentation fault         grun ./box64 ./dontstarve_dedicated_server_nullrenderer_x64

Temporary workaround
If I delete or rename steamclient.so to prevent Box64 from loading it, the server starts normally, but I lose the ability to download mods and other Steam-related features.

Questions

• Has anyone else encountered a similar crash when running the DST server under Box64?
• Is there a way to fix the futex robust_list error while keeping steamclient.so loaded so I can retain Steam functionality?

Thanks everyone.

[ptitSeb]

Issue is certainly: Fatal error: futex robust_list not initialized by pthreads
I did a workaround on 32bit but here, on 64bits, the get_robust_list syscall is just called as-is. I suppose some workaround could be written, but that needs some work.

[blackcat496]

Got it, thanks for the explanation!

[DefenderJohn]

Same problem here:

[BOX64] Dynarec for ARM64, with extension: ASIMD AES CRC32 PMULL ATOMICS SHA1 SHA2 USCAT FLAGM FLAGM2 FRINT AFP
[BOX64] Running on Cortex-A520 with 8 cores, pagesize: 4096
[BOX64] Will use hardware counter measured at 19.2 MHz emulating 2.4 GHz
[BOX64] Didn't detect 48bits of address space, considering it's 39bits
[BOX64] Warning, program break not found
[BOX64] Counted 34 Env var
[BOX64] Library search path:
[BOX64] Binary search path: ./:bin/:/root/miniconda3/condabin/:/usr/local/sbin/:/usr/local/bin/:/usr/sbin/:/usr/bin/:/sbin/:/bin/:/usr/local/games/:/usr/games/:/data/data/com.termux/files/usr/bin/:/system/bin/:/system/xbin/
[BOX64] Looking for /usr/local/bin/box64-bash
[BOX64] Bash detected, disabling banner
[BOX64] Box64 arm64 v0.4.1 df223496b with Dynarec built on Jan 18 2026 06:10:00
[BOX64] Dynarec for ARM64, with extension: ASIMD AES CRC32 PMULL ATOMICS SHA1 SHA2 USCAT FLAGM FLAGM2 FRINT AFP
[BOX64] Running on Cortex-A520 with 8 cores, pagesize: 4096
[BOX64] Will use hardware counter measured at 19.2 MHz emulating 2.4 GHz
[BOX64] steamcmd detected
[BOX64] Didn't detect 48bits of address space, considering it's 39bits
[BOX64] Warning, program break not found
[BOX64] Counted 35 Env var
[BOX64] Library search path:
[BOX64] Binary search path: ./:bin/:/root/miniconda3/condabin/:/usr/local/sbin/:/usr/local/bin/:/usr/sbin/:/usr/bin/:/sbin/:/bin/:/usr/local/games/:/usr/games/:/data/data/com.termux/files/usr/bin/:/system/bin/:/system/xbin/
[BOX64] Looking for /root/box/steam/linux32/steamcmd
[BOX64] Dynarec for ARM64, with extension: ASIMD AES CRC32 PMULL ATOMICS SHA1 SHA2 USCAT FLAGM FLAGM2 FRINT AFP
[BOX64] Running on Cortex-A520 with 8 cores, pagesize: 4096
[BOX64] Will use hardware counter measured at 19.2 MHz emulating 2.4 GHz
[BOX64] Box64 arm64 v0.4.1 df223496b with Dynarec built on Jan 18 2026 06:10:00
[BOX64] Dynarec for ARM64, with extension: ASIMD AES CRC32 PMULL ATOMICS SHA1 SHA2 USCAT FLAGM FLAGM2 FRINT AFP
[BOX64] Running on Cortex-A520 with 8 cores, pagesize: 4096
[BOX64] Will use hardware counter measured at 19.2 MHz emulating 2.4 GHz
[BOX64] steamcmd detected
[BOX64] Didn't detect 48bits of address space, considering it's 39bits
[BOX64] Warning, program break not found
[BOX64] Counted 36 Env var
[BOX64] Library search path:
[BOX64] Binary search path: ./:bin/:/root/miniconda3/condabin/:/usr/local/sbin/:/usr/local/bin/:/usr/sbin/:/usr/bin/:/sbin/:/bin/:/usr/local/games/:/usr/games/:/data/data/com.termux/files/usr/bin/:/system/bin/:/system/xbin/
[BOX64] Looking for /root/box/steam/linux32/steamcmd
[BOX64] Dynarec for ARM64, with extension: ASIMD AES CRC32 PMULL ATOMICS SHA1 SHA2 USCAT FLAGM FLAGM2 FRINT AFP
[BOX64] Running on Cortex-A520 with 8 cores, pagesize: 4096
[BOX64] Will use hardware counter measured at 19.2 MHz emulating 2.4 GHz
[BOX32] Personality set to 32bits
[BOX32] Using Box32 to load 32bits elf
[BOX32] Memory higher than 32bits reserved
[BOX32] Rename process to "steamcmd"
[BOX32] Using native(wrapped) libdl.so.2
[BOX32] Using native(wrapped) librt.so.1
[BOX32] Using native(wrapped) libm.so.6
[BOX32] Using native(wrapped) libpthread.so.0
[BOX32] Using native(wrapped) libc.so.6
[BOX32] Using native(wrapped) ld-linux.so.2
[BOX32] Using emulated /root/box/steam/linux32/crashhandler.so
Redirecting stderr to '/root/Steam/logs/stderr.txt'
Logging directory: '/root/Steam/logs'
[  0%] Checking for available updates...
[----] Verifying installation...
UpdateUI: skip show logo
Steam Console Client (c) Valve Corporation - version 1766451518
-- type 'quit' to exit --
Loading Steam API...IPC function call IClientUtils::GetSteamRealm took too long: 167 msec
Fatal error: futex robust_list not initialized by pthreads

Not really sure what I should do to resolve this problem

[ptitSeb]

Are you on android too?

[DefenderJohn]

yes, on a 8Gen3 device, android