Crash on meta unload

[jeefo]

Metamod-r randomly crashes on meta unload modules that have some commands added with pfnAddServerCommand.

Metamod-r built from source with debug, to get correct backtrace.

Currently loaded plugins:
description stat pend file vers src load unload
[ 1] Reunion RUN - reunion_mm_i386.so v0.1.0.92 ini Start Never
[ 2] AMX Mod X RUN - amxmodx_mm_i386.so v1.10.0.5254 ini Start ANY
[ 4] Ham Sandwich RUN - hamsandwich_amxx_i386.so v1.10.0.5254 pl2 ANY ANY
[ 5] CSX RUN - csx_amxx_i386.so v1.10.0.5254 pl2 ANY ANY
4 plugins, 4 running
version
Protocol version 48
Exe version 1.1.2.7/Stdio (cstrike)
ReHLDS version: 3.6.0.671-dev
Build date: 12:52:00 May 7 2019 (1851)
Build from: rehlds/ReHLDS@3f809d0
game version
ReGameDLL version: 5.7.0.330-dev
Build date: 12:56:40 Apr 23 2019
Build from: rehlds/ReGameDLL_CS@94f0fdb
meta unload amx
L 08/14/2019 - 15:50:27: [META] WARNING: dll: Couldn't close plugin file 'hamsandwich_amxx_i386.so': invalid handle
L 08/14/2019 - 15:50:27: [META] dll: Unloaded plugin 'Ham Sandwich' for reason 'null (request from plugin[0])'
L 08/14/2019 - 15:50:27: [META] dll: Rebuilding callbacks...
L 08/14/2019 - 15:50:27: [META] dll: Callbacks rebuilded.
L 08/14/2019 - 15:50:27: [META] dll: Rebuilding callbacks...
L 08/14/2019 - 15:50:27: [META] dll: Callbacks rebuilded.
L 08/14/2019 - 15:50:27: [META] WARNING: dll: Couldn't close plugin file 'csx_amxx_i386.so': invalid handle
L 08/14/2019 - 15:50:27: [META] dll: Unloaded plugin 'CSX' for reason 'null (request from plugin[0])'
L 08/14/2019 - 15:50:27: [META] dll: Rebuilding callbacks...
L 08/14/2019 - 15:50:27: [META] dll: Callbacks rebuilded.
L 08/14/2019 - 15:50:27: [META] dll: Rebuilding callbacks...
L 08/14/2019 - 15:50:27: [META] dll: Callbacks rebuilded.

Thread 1 "hlds_linux" received signal SIGSEGV, Segmentation fault.
0xf334b85b in MRegCmdList::remove(int) () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
(gdb) bt
#0 0xf334b85b in MRegCmdList::remove(int) () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#1 0xf335deed in MPlugin::unload(PLUG_LOADTIME, PL_UNLOAD_REASON, bool&) () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#2 0xf335099b in cmd_doplug(PLUG_CMD) () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#3 0xf3351009 in _INTERNAL::g_meta_cmds::{lambda()#3}::_FUN() () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#4 0xf334f246 in server_meta() () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#5 0xf3386138 in ?? ()
#6 0xf7539345 in Cmd_ExecuteString_internal(char const*, cmd_source_s, IGameClient*) () from /opt/steam/hlds_l/engine_i486.so
#7 0xf753a43e in Cbuf_Execute() () from /opt/steam/hlds_l/engine_i486.so
#8 0xf3386110 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb)
#0 0xf334b85b in MRegCmdList::remove(int) () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#1 0xf335deed in MPlugin::unload(PLUG_LOADTIME, PL_UNLOAD_REASON, bool&) () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#2 0xf335099b in cmd_doplug(PLUG_CMD) () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#3 0xf3351009 in _INTERNAL::g_meta_cmds::{lambda()#3}::_FUN() () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#4 0xf334f246 in server_meta() () from /opt/steam/hlds_l/./cstrike/addons/metamod/metamod_i386.so
#5 0xf3386138 in ?? ()
#6 0xf7539345 in Cmd_ExecuteString_internal(char const*, cmd_source_s, IGameClient*) () from /opt/steam/hlds_l/engine_i486.so
#7 0xf753a43e in Cbuf_Execute() () from /opt/steam/hlds_l/engine_i486.so
#8 0xf3386110 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)