Proton Experimental segfaults on Steam Flatpak due to libshared-library-guard.so

steamclosed

ValveSoftware/steam-for-linux#12698 · opened 2026-02-02 by hoshinolina · updated 2026-02-02 · 3 comments · github

Hhoshinolina 2026-02-02 github

Your system information

Steam client version (build number or date): 1769025840 (Flatpak)
Distribution (e.g. Ubuntu): Fedora 43
Opted into Steam client beta?: No
Have you checked for system updates?: Yes
Steam Logs: [generate by running this command in a terminal tar -zcvf ~/Desktop/steam-logs.tar.gz ~/.steam/steam/logs]
GPU: AMD

Please describe your issue in as much detail as possible:

Any launch of Proton Experimental segfaults immediately when starting wine64. Enabling Proton logs does not yield anything, the segfault happens seemingly during the dynamic loading stage.

Poking around, I noticed a libshared-library-guard.so getting loaded via LD_AUDIT. Disabling this by changing the launch command to LD_AUDIT= %command% fixes the issue. I believe the crash happens in this library. Using SHARED_LIBRARY_GUARD_DEBUG="*(/*|/.*)/*" gives this:

[pid 1474579] readlink("/proc/self/exe", "/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 4096) = 128
[pid 1474579] write(2, "Using the configuration file /run/parent/app/etc/freedesktop-sdk.ld.so.blockedlist\n", 83) = 83
[pid 1474579] openat(AT_FDCWD, "/run/parent/app/etc/freedesktop-sdk.ld.so.blockedlist", O_RDONLY) = 3
[pid 1474579] fstat(3, {st_mode=S_IFREG|0644, st_size=12936, ...}) = 0
[pid 1474579] mmap(NULL, 12936, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7ffff7fa5000
[pid 1474579] close(3)                  = 0
[pid 1474579] write(2, "pattern *(/*|/.*)/Alien Isolation/bin/AlienIsolation, filename /home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/st", 128) = 128
[pid 1474579] write(2, "eamapps/common/Proton - Experimental/files/bin/wine64-preloader\n", 64) = 64
[pid 1474579] mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ffff7c9b000
[pid 1474579] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x7ffffffefad0} ---

Full output log: steam-1325860.log

This issue does not seem to happen on the non-Flatpak version.

Steps for reproducing this issue:

flatpak install --user com.valvesoftware.Steam
flatpak run com.valvesoftware.Steam
Log in, pick a game/app, enable the Proton Experimental compat option
Launch it

Kkisak-valve maintainer 2026-02-02 github

Hello @hoshinolina, it looks like libshared-library-guard.so is not part of Steam or Proton, potentially part of the Flatpak packaging. This issue needs to be reported to and evaluated by the package maintainers of the Steam Flatpak package.

Please file an issue with them at https://github.com/flathub/com.valvesoftware.Steam.

Ssmcv 2026-02-02 github

Poking around, I noticed a libshared-library-guard.so getting loaded via LD_AUDIT. Disabling this by changing the launch command to LD_AUDIT= %command% fixes the issue.

That LD_AUDIT module is part of the unofficial Steam Flatpak app https://github.com/flathub/com.valvesoftware.Steam/ and is not supplied or supported by Valve.

(Technically I think the library itself is part of https://gitlab.com/freedesktop-sdk/freedesktop-sdk, but it's the unofficial Steam Flatpak app that activates it by adding it to LD_AUDIT.)

Its purpose is to work around native Linux games that bundle libraries that they (probably) shouldn't have bundled, as listed in https://github.com/flathub/com.valvesoftware.Steam/tree/master/resources/blocklist. Valve doesn't support or recommend this particular workaround.

flatpak override --user --env=SHARED_LIBRARY_GUARD=0 com.valvesoftware.Steam would deactivate it.

I believe the crash happens in this library

Are you able to get a backtrace, perhaps from systemd-coredump, which would confirm or deny this?

Hhoshinolina 2026-02-02 github

I couldn't figure out where that module came from (Google search for the code came up empty) so I assumed it was part of official packaging, sorry!

Are you able to get a backtrace, perhaps from systemd-coredump, which would confirm or deny this?

Took some poking around but I managed:

(gdb) bt
#0  0x00007ffff7e8787d in internal_fnmatch (pattern=pattern@entry=0x7fffffff7329 "/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8369 "common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=no_leading_period@entry=true, 
    flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:41
#1  0x00007ffff7e873ea in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8369 "common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=no_leading_period@entry=true, 
    flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1102
#2  0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8369 "common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=<optimized out>, 
    flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
#3  0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8368 "/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
#4  0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8368 "/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=<optimized out>, 
    flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
#5  0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff835e "/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
#6  0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff835e "/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=<optimized out>, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
#7  0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8358 "/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
#8  0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8358 "/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=<optimized out>, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
#9  0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8352 "/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
[#10](/issue/ValveSoftware/steam-for-linux/10) 0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8352 "/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=<optimized out>, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
[#11](/issue/ValveSoftware/steam-for-linux/11) 0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff834b "/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
[#12](/issue/ValveSoftware/steam-for-linux/12) 0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff834b "/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", string_end=string_end@entry=0x7fffffff83a0 "", 
    no_leading_period=<optimized out>, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
[#13](/issue/ValveSoftware/steam-for-linux/13) 0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8333 "/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
[#14](/issue/ValveSoftware/steam-for-linux/14) 0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8333 "/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=<optimized out>, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
[#15](/issue/ValveSoftware/steam-for-linux/15) 0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff832f "/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
[#16](/issue/ValveSoftware/steam-for-linux/16) 0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff832f "/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=<optimized out>, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
[#17](/issue/ValveSoftware/steam-for-linux/17) 0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff832a "/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
[#18](/issue/ValveSoftware/steam-for-linux/18) 0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff832a "/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=<optimized out>, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
[#19](/issue/ValveSoftware/steam-for-linux/19) 0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8325 "/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=no_leading_period@entry=false, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
[#20](/issue/ValveSoftware/steam-for-linux/20) 0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8325 "/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=<optimized out>, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
[#21](/issue/ValveSoftware/steam-for-linux/21) 0x00007ffff7e87515 in ext_match (opt=opt@entry=42, pattern=0x7fffffff7321 "(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8320 "/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=string_end@entry=0x7fffffff83a0 "", no_leading_period=no_leading_period@entry=true, flags=flags@entry=37) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:1125
[#22](/issue/ValveSoftware/steam-for-linux/22) 0x00007ffff7e885e9 in internal_fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8320 "/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", 
    string_end=0x7fffffff83a0 "", no_leading_period=<optimized out>, no_leading_period@entry=true, flags=flags@entry=37, ends=ends@entry=0x0) at /usr/lib/debug/source/bootstrap/glibc.bst/posix/fnmatch_loop.c:93
[#23](/issue/ValveSoftware/steam-for-linux/23) 0x00007ffff7e8b22f in __fnmatch (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", string=string@entry=0x7fffffff8320 "/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", flags=flags@entry=37)
    at fnmatch.c:283
[#24](/issue/ValveSoftware/steam-for-linux/24) 0x00007ffff7faa3b7 in match_path (pattern=pattern@entry=0x7fffffff7320 "*(/*|/.*)/Alien Isolation/bin/AlienIsolation", filename=filename@entry=0x7fffffff8320 "/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader")
    at ../shared-library-guard.c:46
[#25](/issue/ValveSoftware/steam-for-linux/25) 0x00007ffff7faa6c3 in load_blocked_list (process_name=0x7fffffff8320 "/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", config_name=<optimized out>) at ../shared-library-guard.c:124
[#26](/issue/ValveSoftware/steam-for-linux/26) la_version (version=2) at ../shared-library-guard.c:191
[#27](/issue/ValveSoftware/steam-for-linux/27) 0x00007ffff7fd4360 in load_audit_module (name=0x7fffffff94a8 "/tmp/pressure-vessel-libs-wyQBRd/${LIB}/libshared-library-guard.so", last_audit=<synthetic pointer>) at rtld.c:950
[#28](/issue/ValveSoftware/steam-for-linux/28) load_audit_modules (main_map=<optimized out>, audit_list=0x7fffffff9410) at rtld.c:1041
[#29](/issue/ValveSoftware/steam-for-linux/29) dl_main (phdr=<optimized out>, phnum=<optimized out>, user_entry=<optimized out>, auxv=<optimized out>) at rtld.c:1794
[#30](/issue/ValveSoftware/steam-for-linux/30) 0x00007ffff7fd0566 in _dl_sysdep_start (start_argptr=start_argptr@entry=0x7fffffff9710, dl_main=dl_main@entry=0x7ffff7fd1e10 <dl_main>) at ../sysdeps/unix/sysv/linux/dl-sysdep.c:140
[#31](/issue/ValveSoftware/steam-for-linux/31) 0x00007ffff7fd1c21 in _dl_start_final (arg=0x7fffffff9710) at rtld.c:497
[#32](/issue/ValveSoftware/steam-for-linux/32) _dl_start (arg=0x7fffffff9710) at rtld.c:582
[#33](/issue/ValveSoftware/steam-for-linux/33) 0x00007ffff7fd0ac8 in _start () from /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2
[#34](/issue/ValveSoftware/steam-for-linux/34) 0x0000000000000003 in ?? ()
[#35](/issue/ValveSoftware/steam-for-linux/35) 0x00007fffffff9fb0 in ?? ()
[#36](/issue/ValveSoftware/steam-for-linux/36) 0x00007fffffffa027 in ?? ()
[#37](/issue/ValveSoftware/steam-for-linux/37) 0x00007fffffffa045 in ?? ()
[#38](/issue/ValveSoftware/steam-for-linux/38) 0x0000000000000000 in ?? ()

That looks like a stack overflow, but the stack is tiny and for some reason not growing as it normally would?

rbp            0x7fffffff04e0      0x7fffffff04e0
rsp            0x7ffffffefbe0      0x7ffffffefbe0

 [45]     0x7ffffe000000->0x7fffffff0000 at 0x00132000: load33 ALLOC READONLY
 [46]     0x7fffffff0000->0x7ffffffff000 at 0x00132000: load34 ALLOC LOAD HAS_CONTENTS

So it looks like something gets mapped right under the stack. From strace:

[pid 1472995] execve("/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", ["/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64-preloader", "/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/common/Proton - Experimental/files/bin/wine64", "c:\\windows\\system32\\steam.exe", "/home/lina/.var/app/com.valvesoftware.Steam/.local/share/Steam/legacycompat/iscriptevaluator.exe", "legacycompat\\evaluatorscript_1325860.vdf"], 0x55555555b110 /* 180 vars */) = 0
[pid 1472995] arch_prctl(ARCH_SET_FS, 0x7ffff7ffe0a0) = 0
[pid 1472995] mmap(0x10000, 1048576, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x10000
[pid 1472995] mmap(0x110000, 1743716352, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x110000
[pid 1472995] mmap(0x7f000000, 16711680, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x7f000000
[pid 1472995] mmap(0x7ffffe000000, 33488896, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x7ffffe000000

And that comes from here:

https://github.com/wine-mirror/wine/blob/648e636256af35e56a69daaddc31f7c9619aa079/loader/preloader.c#L118

So I guess Wine just isn't compatible with that LD_AUDIT because it only leaves a small stack for the preloader to work with (until wine later unmaps the preload ranges)...

Proton versions

proton experimentalx1 2026-02