[Linux] 段错误 #44

Sam0523 · 2021-07-03T05:59:20Z

版本：git master

环境：
OS: openSUSE Tumbleweed x86_64
Kernel: 5.12.12-1-default
DE: GNOME 40.2
Qt 5.15.2

(gdb) r
Starting program: /home/sam/repo/KikoPlay/KikoPlay 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
[New Thread 0x7fffe997b640 (LWP 19704)]
[New Thread 0x7fffe3fff640 (LWP 19705)]
[New Thread 0x7fffe37fe640 (LWP 19707)]
[Thread 0x7fffe37fe640 (LWP 19707) exited]
[New Thread 0x7fffe37fe640 (LWP 19708)]
[New Thread 0x7fffe2ecb640 (LWP 19709)]
[Thread 0x7fffe37fe640 (LWP 19708) exited]
[Thread 0x7fffe2ecb640 (LWP 19709) exited]
[New Thread 0x7fffe2ecb640 (LWP 19710)]
[New Thread 0x7fffe37fe640 (LWP 19711)]
[New Thread 0x7fffe259b640 (LWP 19712)]
[New Thread 0x7fffe1d9a640 (LWP 19713)]
[New Thread 0x7fffe1599640 (LWP 19714)]
[New Thread 0x7fffe0d98640 (LWP 19715)]
[Thread 0x7fffe1599640 (LWP 19714) exited]
[Thread 0x7fffe0d98640 (LWP 19715) exited]
[New Thread 0x7fffe0d98640 (LWP 19716)]
[New Thread 0x7fffe1599640 (LWP 19717)]
[Thread 0x7fffe0d98640 (LWP 19716) exited]
[Thread 0x7fffe1599640 (LWP 19717) exited]
[New Thread 0x7fffe1599640 (LWP 19718)]
[New Thread 0x7fffe0d98640 (LWP 19719)]
[New Thread 0x7fffc3fff640 (LWP 19720)]
[New Thread 0x7fffc37fe640 (LWP 19721)]
[New Thread 0x7fffc2ffd640 (LWP 19722)]

Thread 17 "mpv/lua script " received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc3fff640 (LWP 19720)]
lua_cpcall (L=L@entry=0x7fffc80022a8, func=func@entry=0x7ffff7de93b0 <run_lua>, ud=ud@entry=0x7fffc8000c50) at /usr/src/debug/moonjit-2.2.0-2.8.x86_64/src/lj_api.c:1218
1218	  uint8_t oldh = hook_save(g);

(gdb) bt
#0  lua_cpcall (L=L@entry=0x7fffc80022a8, func=func@entry=0x7ffff7de93b0 <run_lua>, ud=ud@entry=0x7fffc8000c50) at /usr/src/debug/moonjit-2.2.0-2.8.x86_64/src/lj_api.c:1218
#1  0x00007ffff7ded8d0 in load_lua (args=<optimized out>) at ../player/lua.c:451
#2  0x00007ffff7df9344 in run_script (arg=arg@entry=0xa8e4b0) at ../player/scripting.c:91
#3  0x00007ffff7df93c9 in script_thread (p=0xa8e4b0) at ../player/scripting.c:103
#4  0x00007ffff3b61259 in start_thread (arg=0x7fffc3fff640) at pthread_create.c:481
#5  0x00007ffff626a2b3 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) i thr
  Id   Target Id                                           Frame 
  1    Thread 0x7fffeba6efc0 (LWP 19653) "KikoPlay"        clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:78
  2    Thread 0x7fffe997b640 (LWP 19704) "QXcbEventQueue"  0x00007ffff625f59f in __GI___poll (fds=0x7fffe997a448, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
  3    Thread 0x7fffe3fff640 (LWP 19705) "QDBusConnection" 0x00007ffff625f59f in __GI___poll (fds=0x7fffdc004a30, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
  7    Thread 0x7fffe2ecb640 (LWP 19710) "gmain"           0x00007ffff625f59f in __GI___poll (fds=0x96db40, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
  8    Thread 0x7fffe37fe640 (LWP 19711) "gdbus"           0x00007ffff625f59f in __GI___poll (fds=0x90b160, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
  9    Thread 0x7fffe259b640 (LWP 19712) "pool-KikoPlay"   syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  10   Thread 0x7fffe1d9a640 (LWP 19713) "pool-KikoPlay"   syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  15   Thread 0x7fffe1599640 (LWP 19718) "workThread"      0x00007ffff625f59f in __GI___poll (fds=0x7fffc4004b00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
  16   Thread 0x7fffe0d98640 (LWP 19719) "mpv/mpv core"    0x00007ffff3b6d9da in __futex_abstimed_wait_common64 (futex_word=futex_word@entry=0x9dd990, expected=expected@entry=0, 
    clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at ../sysdeps/nptl/futex-internal.c:74
* 17   Thread 0x7fffc3fff640 (LWP 19720) "mpv/lua script " lua_cpcall (L=L@entry=0x7fffc80022a8, func=func@entry=0x7ffff7de93b0 <run_lua>, ud=ud@entry=0x7fffc8000c50)
    at /usr/src/debug/moonjit-2.2.0-2.8.x86_64/src/lj_api.c:1218
  18   Thread 0x7fffc37fe640 (LWP 19721) "mpv/lua script " lua_cpcall (L=L@entry=0x7fffbc000eb8, func=func@entry=0x7ffff7de93b0 <run_lua>, ud=ud@entry=0x7fffbc000bb0)
    at /usr/src/debug/moonjit-2.2.0-2.8.x86_64/src/lj_api.c:1218
  19   Thread 0x7fffc2ffd640 (LWP 19722) "KikoPlay"        clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:78
(gdb)

The text was updated successfully, but these errors were encountered:

Protostars · 2021-07-03T16:10:03Z

从调用栈来看，错误发生在mpv加载lua的过程中，不知道你用的libmpv的信息？

Sam0523 · 2021-07-14T03:56:21Z

从调用栈来看，错误发生在mpv加载lua的过程中，不知道你用的libmpv的信息？

是 Tumbleweed 官方仓库提供的版本：
0.33.1+git.20210630T163736.f2afae55e9

Protostars · 2021-07-14T16:11:16Z

从调用栈来看，错误发生在mpv加载lua的过程中，不知道你用的libmpv的信息？

是 Tumbleweed 官方仓库提供的版本：
0.33.1+git.20210630T163736.f2afae55e9

系统上其他使用libmpv的播放器有没有问题呢？这个我现在也没有条件来复现

Sam0523 · 2021-07-21T03:44:36Z

从调用栈来看，错误发生在mpv加载lua的过程中，不知道你用的libmpv的信息？

是 Tumbleweed 官方仓库提供的版本：
0.33.1+git.20210630T163736.f2afae55e9

系统上其他使用libmpv的播放器有没有问题呢？这个我现在也没有条件来复现

Celluloid 是正常的。

MrAru · 2022-01-14T13:17:11Z

同样的问题。
环境：ArchLinux, KikoPlay AUR 0.8.1, mpv 0.34.1, lua 5.3.6, luajit 2.0.5

(gdb) r
Starting program: /usr/bin/KikoPlay
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffe150b640 (LWP 52319)]
[New Thread 0x7fffdb084640 (LWP 52320)]
[New Thread 0x7fffda178640 (LWP 52321)]
[New Thread 0x7fffd9977640 (LWP 52322)]
[New Thread 0x7fffd9176640 (LWP 52323)]
[New Thread 0x7fffd8975640 (LWP 52324)]
[New Thread 0x7fffcbfff640 (LWP 52325)]

Thread 6 "mpv/lua script " received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffd9176640 (LWP 52323)]
0x00007ffff3f717c0 in lua_cpcall () from /usr/lib/libluajit-5.1.so.2
(gdb) bt
#0  0x00007ffff3f717c0 in lua_cpcall () at /usr/lib/libluajit-5.1.so.2
#1  0x00007ffff7e193ad in  () at /usr/lib/libmpv.so.1
#2  0x00007ffff7e25259 in  () at /usr/lib/libmpv.so.1
#3  0x00007ffff7e252df in  () at /usr/lib/libmpv.so.1
#4  0x00007ffff6234259 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff64a35e3 in clone () at /usr/lib/libc.so.6
(gdb) i thr
  Id   Target Id                                           Frame
  1    Thread 0x7fffe1d74100 (LWP 52315) "KikoPlay"        0x00007ffff64a35d5 in clone ()
   from /usr/lib/libc.so.6
  2    Thread 0x7fffe150b640 (LWP 52319) "QXcbEventQueue"  0x00007ffff6498b2f in poll ()
   from /usr/lib/libc.so.6
  3    Thread 0x7fffdb084640 (LWP 52320) "QDBusConnection" 0x00007ffff6498b2f in poll ()
   from /usr/lib/libc.so.6
  4    Thread 0x7fffda178640 (LWP 52321) "workThread"      0x00007ffff6498b2f in poll ()
   from /usr/lib/libc.so.6
  5    Thread 0x7fffd9977640 (LWP 52322) "mpv/mpv core"    0x00007ffff62408ca in __futex_abstimed_wait_common64 () from /usr/lib/libpthread.so.0
* 6    Thread 0x7fffd9176640 (LWP 52323) "mpv/lua script " 0x00007ffff3f717c0 in lua_cpcall ()
   from /usr/lib/libluajit-5.1.so.2
  7    Thread 0x7fffd8975640 (LWP 52324) "mpv/lua script " 0x00007ffff3f717c0 in lua_cpcall ()
   from /usr/lib/libluajit-5.1.so.2
  8    Thread 0x7fffcbfff640 (LWP 52325) "KikoPlay"        0x00007ffff64a35d5 in clone ()
   from /usr/lib/libc.so.6

Protostars · 2022-01-14T13:46:28Z

挺奇怪的，要不试一下编译mpv官方这个例子 https://github.com/mpv-player/mpv-examples/tree/master/libmpv/qt_opengl ，看看可以正常运行吗

MrAru · 2022-01-14T14:08:25Z

挺奇怪的，要不试一下编译mpv官方这个例子 https://github.com/mpv-player/mpv-examples/tree/master/libmpv/qt_opengl ，看看可以正常运行吗

正常运行。

❯ ./qt_opengl
[cplayer] mpv 0.34.1-dirty Copyright © 2000-2021 mpv/MPlayer/mplayer2 projects
[cplayer]  built on UNKNOWN
[cplayer] FFmpeg library versions:
[cplayer]    libavutil       56.70.100
[cplayer]    libavcodec      58.134.100
[cplayer]    libavformat     58.76.100
[cplayer]    libswscale      5.9.100
[cplayer]    libavfilter     7.110.100
[cplayer]    libswresample   3.9.100
[cplayer] FFmpeg version: n4.4.1
[cplayer]
[cplayer] Configuration: /usr/bin/waf configure --prefix=/usr --confdir=/etc/mpv --enable-cdda --enable-dvb --enable-dvdnav --enable-libarchive --enable-libmpv-shared --disable-build-date --disable-caca
[cplayer] List of enabled features: alsa asm cdda cplayer cplugins cuda-hwaccel cuda-interop debug-build drm dvbin dvdnav egl egl-drm egl-helpers egl-x11 ffmpeg ffmpeg-aviocontext-bytes-read ffnvcodec gbm gbm.h gl gl-wayland glibc-thread-name glob glob-posix gpl iconv jack javascript jpeg lcms2 libarchive libass libavdevice libbluray libdl libm libmpv-shared libplacebo librt linux-fstatfs linux-input-event-codes lua luajit memfd_create optimize plain-gl posix posix-or-mingw pthreads pulse rubberband shaderc shaderc-shared stdatomic uchardet vaapi vaapi-drm vaapi-egl vaapi-vulkan vaapi-wayland vaapi-x-egl vaapi-x11 vdpau vector vt.h vulkan wayland wayland-protocols x11 xv zimg zlib
[cplayer] Waiting for scripts...
[osd/libass] libass API version: 0x1502000
[osd/libass] libass source: commit: 0.15.2-0-gc967a5a3d9ec0d36af1148b3fdf2f307a21dd122-dirty
[osd/libass] Shaper: FriBidi 1.0.10 (SIMPLE) HarfBuzz-ng 3.2.0 (COMPLEX)
[osd/libass] Setting up fonts...
[osd/libass] Using font provider fontconfig
[osd/libass] Done.
[cplayer] Done loading scripts.
[libmpv_render] GL_VERSION='4.6 (Compatibility Profile) Mesa 21.3.4'
[libmpv_render] Detected desktop OpenGL 4.6.
[libmpv_render] GL_VENDOR='Intel'
[libmpv_render] GL_RENDERER='Mesa Intel(R) UHD Graphics 630 (CFL GT2)'
[libmpv_render] GL_SHADING_LANGUAGE_VERSION='4.60'
[libmpv_render] GL_*_swap_control extension missing.
[libmpv_render] Testing FBO format rgba16f
[libmpv_render] Using FBO format rgba16f.
[libmpv_render] No advanced processing required. Enabling dumb mode.
[libmpv_render] Loading hwdec driver 'vaapi-egl'
[libmpv_render/vaapi-egl] VAAPI hwdec only works with OpenGL or Vulkan backends.
[libmpv_render] Loading failed.
[libmpv_render] Loading hwdec driver 'cuda-nvdec'
[libmpv_render/cuda-nvdec] cu->cuInit(0) failed -> CUDA_ERROR_NO_DEVICE: no CUDA-capable device is detected
[libmpv_render] Loading failed.
[libmpv_render] Loading hwdec driver 'drmprime-drm'
[libmpv_render/drmprime-drm] Failed to retrieve DRM fd from native display.
[libmpv_render] Loading failed.

Protostars · 2022-01-14T14:33:09Z

https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L113
https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L123
https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L123
https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L100
试着把这几行都注释掉
之后把settings.ini里的Play/ShowPreview 改成false （如果没有找到，就直接把这里https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L149的true改成false），之后重新编译测试看看

MrAru · 2022-01-14T15:09:45Z

https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L113 https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L123 https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L123 https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L100 试着把这几行都注释掉之后把settings.ini里的Play/ShowPreview 改成false （如果没有找到，就直接把这里https://github.com/KikoPlayProject/KikoPlay/blob/master/Play/Video/mpvplayer.cpp#L149的true改成false），之后重新编译测试看看

你提到的四个链接里事实上只涉及到了三行代码（L100, L113 和 L123）。把这三行注释掉，并将 L149 改为 false 重新编译后运行，仍然报 Segmentation fault. gdb 结果与 #44 (comment) 中完全一致。

Protostars · 2022-01-14T15:16:04Z

系统的mpv有加载什么脚本吗，有条件可否在源码上单步调试一下？

MrAru · 2022-01-14T15:46:08Z

系统的mpv有加载什么脚本吗，有条件可否在源码上单步调试一下？

没有加载脚本。我可以尝试一下单步调试，具体需要在哪几处打断点，或是看哪些变量？

Protostars · 2022-01-14T16:15:57Z

可以从MPVPlayer的构造函数开始MPVPlayer::MPVPlayer(QWidget *parent)
还有就是KikoPlay自己也会加载脚本，你可以把script目录下的脚本先删了之后试试

CHN-beta · 2022-01-15T05:44:51Z

我的环境是gentoo，也有同样的问题。逐步调试后发现是mpv加载youtube-dl的脚本时发生错误。应该是mpv的问题。

一个临时的解决办法是，关掉mpv的lua支持：

# /etc/portage/package.use
media-video/mpv -lua

hooke007 · 2022-02-04T13:25:38Z

试试libmpv调用原始的lua@5.1而不是luajit/moonjit

widsnoy · 2022-02-05T13:51:58Z

试试libmpv调用原始的lua@5.1而不是luajit/moonjit

请问具体怎么操作？

hooke007 · 2022-02-05T15:06:57Z

不熟悉linux，只知道libmpv应由lua5.1构建

CHN-beta · 2022-02-05T17:20:21Z

试试libmpv调用原始的lua@5.1而不是luajit/moonjit

请问具体怎么操作？

如果是用gentoo的话：

# /etc/portage/package.use
media-video/mpv  LUA_SINGLE_TARGET: -luajit lua5-1

但是亲测还会段错误。

vowstar · 2022-02-20T18:30:08Z

试试libmpv调用原始的lua@5.1而不是luajit/moonjit

请问具体怎么操作？

如果是用gentoo的话：
# /etc/portage/package.use
media-video/mpv  LUA_SINGLE_TARGET: -luajit lua5-1
但是亲测还会段错误。

我猜测是因为mpv 依赖lua5.1，但是用kikoplay启用后我观测到mpv错误调用了lua5.3的库，API不相容，直接就崩溃了。我不得不把gentoo的kikoplay的依赖里加了mpv[-lua]这样的限制去掉它的lua5.1支持。
关于mpv还有一个讨论，mpv-player/mpv#5205
结论是他们好几年完全没有升级lua版本的计划。现在我们得想办法让kikoplay用着lua5.3的同时，还得让libmpv正确使用lua5.1的链接库才能不崩溃

Protostars · 2022-02-21T01:33:52Z

试试libmpv调用原始的lua@5.1而不是luajit/moonjit

请问具体怎么操作？

如果是用gentoo的话：
# /etc/portage/package.use
media-video/mpv  LUA_SINGLE_TARGET: -luajit lua5-1
但是亲测还会段错误。
我猜测是因为mpv 依赖lua5.1，但是用kikoplay启用后我观测到mpv错误调用了lua5.3的库，API不相容，直接就崩溃了。我不得不把gentoo的kikoplay的依赖里加了mpv[-lua]这样的限制去掉它的lua5.1支持。关于mpv还有一个讨论，mpv-player/mpv#5205 结论是他们好几年完全没有升级lua版本的计划。现在我们得想办法让kikoplay用着lua5.3的同时，还得让libmpv正确使用lua5.1的链接库才能不崩溃

linux上libmpv能不能静态链接lua 5.1

vowstar · 2022-02-21T03:43:06Z

试试libmpv调用原始的lua@5.1而不是luajit/moonjit

请问具体怎么操作？

如果是用gentoo的话：
# /etc/portage/package.use
media-video/mpv  LUA_SINGLE_TARGET: -luajit lua5-1
但是亲测还会段错误。
我猜测是因为mpv 依赖lua5.1，但是用kikoplay启用后我观测到mpv错误调用了lua5.3的库，API不相容，直接就崩溃了。我不得不把gentoo的kikoplay的依赖里加了mpv[-lua]这样的限制去掉它的lua5.1支持。关于mpv还有一个讨论，mpv-player/mpv#5205 结论是他们好几年完全没有升级lua版本的计划。现在我们得想办法让kikoplay用着lua5.3的同时，还得让libmpv正确使用lua5.1的链接库才能不崩溃
linux上libmpv能不能静态链接lua 5.1

可以是可以，但是这些Linux发行版的维护者那边不容易沟通，估计写了后不让提交package进去会被打回来，他们的哲学是linux要尽可能的复用所有的so文件，会让我们正面解决这个问题。现在workaround是直接禁用了mpv本身的lua依赖，后面看再想想办法怎样让libmpv load liblua5.1.so的同时让kikoplay可以load liblua5.3.so然后再load libmpv.so

vowstar · 2022-02-21T11:28:58Z

我分析错了，现在看起来是mpv的问题很大

Thread 9 "mpv/lua script " received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffd9ffb640 (LWP 1721858)]
0x00007ffff646bdc6 in ?? () from /usr/lib64/liblua5.1.so.0
(gdb) bt
#0  0x00007ffff646bdc6 in  () at /usr/lib64/liblua5.1.so.0
#1  0x00007ffff6472a9b in  () at /usr/lib64/liblua5.1.so.0
#2  0x00007ffff6473919 in  () at /usr/lib64/liblua5.1.so.0
#3  0x00007ffff646ee17 in lua_cpcall () at /usr/lib64/liblua5.1.so.0
#4  0x00007ffff7e31c95 in  () at /usr/lib64/libmpv.so.1
#5  0x00007ffff7e3bc24 in  () at /usr/lib64/libmpv.so.1
#6  0x00007ffff7e3c0a9 in  () at /usr/lib64/libmpv.so.1
#7  0x00007ffff651e387 in  () at /lib64/libc.so.6
#8  0x00007ffff65a01ac in  () at /lib64/libc.so.6

vowstar · 2022-02-21T13:51:36Z

Thread 9 "mpv/lua script " received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffd9ffb640 (LWP 1830055)]
0x0000000000000000 in ?? ()
(gdb) bt
#0  0x0000000000000000 in  ()
#1  0x00007ffff461280b in  () at /usr/lib64/libluajit-5.1.so.2
#2  0x00007ffff46161dc in  () at /usr/lib64/libluajit-5.1.so.2
#3  0x00007ffff4620c39 in  () at /usr/lib64/libluajit-5.1.so.2
#4  0x00007ffff460ee2c in  () at /usr/lib64/libluajit-5.1.so.2
#5  0x00007ffff46233ed in lua_cpcall () at /usr/lib64/libluajit-5.1.so.2
#6  0x00007ffff7e31c95 in  () at /usr/lib64/libmpv.so.1
#7  0x00007ffff7e3bc24 in  () at /usr/lib64/libmpv.so.1
#8  0x00007ffff7e3c0a9 in  () at /usr/lib64/libmpv.so.1
#9  0x00007ffff651e387 in  () at /lib64/libc.so.6
#10 0x00007ffff65a01ac in  () at /lib64/libc.so.6

现在证实了无论是luajit还是lua5.1支持的libmpv都会崩溃，去掉lua支持的libmpv是正常的，看样子真的是lua5.1和lua5.3符号冲突问题，可见静态链接说不定是最快的解决方法了。
我用mpv官方的QT example直接链接lua5.3也能复现这个问题

Protostars closed this as completed Dec 25, 2021

Protostars reopened this Jan 13, 2022

CL-Jeremy mentioned this issue May 28, 2022

Fix build on linux by shipping static lua #65

Merged

Alaskra mentioned this issue Oct 24, 2022

Manjaro下编译错误 #97

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[Linux] 段错误 #44

[Linux] 段错误 #44

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[Linux] 段错误 #44

[Linux] 段错误 #44

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Sam0523 commented Jul 3, 2021

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