bug#42858: Remote guix-daemon crashes upon 'guix copy'

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bug#42858: Remote guix-daemon crashes upon 'guix copy'

From:	maxim . cournoyer
Subject:	bug#42858: Remote guix-daemon crashes upon 'guix copy'
Date:	Fri, 14 Aug 2020 01:18:34 -0400
Hello,

I seem to be able to reproduce the following crash:

On the sender:

--8<---------------cut here---------------start------------->8---
$ guix copy $(realpath ~/.config/guix/current) --to=x200
sending 26 store items (349 MiB) to 'x200.local'...
Segmentation fault
--8<---------------cut here---------------end--------------->8---

On the receiver:

--8<---------------cut here---------------start------------->8---
$ pgrep guix-daemon
246

$ sudo strace -s320 -f -p 246
[...]
[pid  1153] openat(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/keymap.scm", 
O_WRONLY|O_CREAT|O_EXCL, 0666) = 8
[pid  1153] fallocate(8, 0, 0, 8720)    = 0
[pid  1153] write(8, ";;; GNU Guix --- Functional package management for 
GNU\n;;; Copyright \302\251 2018, 2020 Mathieu Othacehe 
<m.othacehe@gmail.com>\n;;; Copyright \302\251 2019 Ludovic Court\303\250s 
<ludo@gnu.org>\n;;; Copyright \302\251 2020 Florian Pelz 
<pelzflorian@pelzflorian.de>\n;;;\n;;; This file is part of GNU Guix.\n;;;\n;;; 
GNU Guix is free software; you c"..., 8720) = 8720
[pid  1153] close(8)                    = 0
[pid  1153] openat(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/locale.scm", 
O_WRONLY|O_CREAT|O_EXCL, 0666) = 8
[pid  1153] fallocate(8, 0, 0, 8727)    = 0
[pid  1153] write(8, ";;; GNU Guix --- Functional package management for 
GNU\n;;; Copyright \302\251 2018 Mathieu Othacehe <m.othacehe@gmail.com>\n;;; 
Copyright \302\251 2019 Ludovic Court\303\250s <ludo@gnu.org>\n;;;\n;;; This 
file is part of GNU Guix.\n;;;\n;;; GNU Guix is free software; you can 
redistribute it and/or modify it\n;;; under the terms of the GNU Gen"..., 8727) 
= 8727
[pid  1153] rt_sigaction(SIGIO, {sa_handler=SIG_IGN, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER, sa_restorer=0x7f3e67632b20}, {sa_handler=0x40a370, 
sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER, 
sa_restorer=0x7f3e67632b20}, 8) = 0
[pid  1153] write(4, "atad\0\0\0\0\0\200\0\0\0\0\0\0", 16) = 16
[pid  1153] --- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} ---
[pid  1153] read(4, "", 32768)          = 0
[pid  1153] futex(0x7f3e677d11a0, FUTEX_WAKE_PRIVATE, 2147483647) = 0
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=16, 
...}) = 0
[pid  1153] openat(AT_FDCWD, "/gnu/store/nix-1153-0", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 8
[pid  1153] fstat(8, {st_mode=S_IFDIR|0755, st_size=16, ...}) = 0
[pid  1153] getdents64(8, 0x17d4150 /* 3 entries */, 32768) = 80
[pid  1153] getdents64(8, 0x17d4150 /* 0 entries */, 32768) = 0
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=tx_mode=S_IFDIR|0755, stx_size=6, ...}) = 0
[pid  1153] openat(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 8
[pid  1153] fstat(8, {st_mode=S_IFDIR|0755, st_size=6, ...}) = 0
[pid  1153] getdents64(8, 0x17d4d60 /* 3 entries */, 32768) = 72
[pid  1153] getdents64(8, 0x17d4d60 /* 0 entries */, 32768) = 0
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=94, 
...}) = 0
[pid  1153] openat(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 8
[pid  1153] fstat(8, {st_mode=S_IFDIR|0755, st_size=94, ...}) = 0
[pid  1153] getdents64(8, 0x17d5970 /* 7 entries */, 32768) = 216
[pid  1153] getdents64(8, 0x17d5970 /* 0 entries */, 32768) = 0
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/bootloader", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=90, 
...}) = 0
[pid  1153] openat(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/bootloader", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 8
[pid  1153] fstat(8, {st_mode=S_IFDIR|0755, st_size=90, ...}) = 0
[pid  1153] getdents64(8, 0x17d6580 /* 6 entries */, 32768) = 184
[pid  1153] getdents64(8, 0x17d6580 /* 0 entries */, 32768) = 0
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/bootloader/depthcharge.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=4540, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/bootloader/depthcharge.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/bootloader/extlinux.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=4284, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/bootloader/extlinux.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/bootloader/grub.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=21527, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/bootloader/grub.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/bootloader/u-boot.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=9338, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/bootloader/u-boot.scm") 
= 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/bootloader") = -1 EISDIR 
(Is a directory)
[pid  1153] rmdir("/gnu/store/nix-1153-0/unpacked/gnu/bootloader") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/bootloader.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=8944, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/bootloader.scm") = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/build", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=446, 
...}) = 0
[pid  1153] openat(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/build", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 8
[pid  1153] fstat(8, {st_mode=S_IFDIR|0755, st_size=446, ...}) = 0
[pid  1153] getdents64(8, 0x17d6580 /* 19 entries */, 32768) = 672
[pid  1153] getdents64(8, 0x17d6580 /* 0 entries */, 32768) = 0
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/accounts.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=21568, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/accounts.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/activation.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=13462, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/activation.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/bootloader.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=3883, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/bootloader.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/cross-toolchain.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=7936, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/cross-toolchain.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/file-systems.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=31661, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/file-systems.scm") 
= 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/hurd-boot.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=11866, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/hurd-boot.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/image.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=12581, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/image.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/install.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=9202, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/install.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/linux-boot.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=21754, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/linux-boot.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/linux-container.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=15684, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/linux-container.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/linux-initrd.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=6197, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/linux-initrd.scm") 
= 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/linux-modules.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=25913, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/linux-modules.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/locale.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=3625, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/locale.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/marionette.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=13630, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/marionette.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/build/shepherd.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=7854, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/shepherd.scm") = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/build/svg.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=2844, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/svg.scm") = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/build/vm.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=20235, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build/vm.scm") = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/build") = -1 EISDIR (Is 
a directory)
[pid  1153] rmdir("/gnu/store/nix-1153-0/unpacked/gnu/build") = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/image.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=2940, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/image.scm") = 0
[pid  1153] statx(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/installer", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=130, 
...}) = 0
[pid  1153] openat(AT_FDCWD, "/gnu/store/nix-1153-0/unpacked/gnu/installer", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 8
[pid  1153] fstat(8, {st_mode=S_IFDIR|0755, st_size=130, ...}) = 0
[pid  1153] getdents64(8, 0x17d6580 /* 9 entries */, 32768) = 264
[pid  1153] getdents64(8, 0x17d6580 /* 0 entries */, 32768) = 0
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/aux-files", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=16, 
...}) = 0
[pid  1153] openat(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/aux-files", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 8
[pid  1153] fstat(8, {st_mode=S_IFDIR|0755, st_size=16, ...}) = 0
[pid  1153] brk(0x1807000)              = 0x1807000
[pid  1153] getdents64(8, 0x17de620 /* 3 entries */, 32768) = 80
[pid  1153] getdents64(8, 0x17de620 /* 0 entries */, 32768) = 0
[pid  1153] brk(0x17ff000)              = 0x17ff000
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/aux-files/logo.txt", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=1020, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/aux-files/logo.txt") = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/aux-files") = 
-1 EISDIR (Is a directory)
[pid  1153] rmdir("/gnu/store/nix-1153-0/unpacked/gnu/installer/aux-files") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/connman.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=14568, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/connman.scm") 
= 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/final.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=9231, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/final.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/hostname.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=957, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/hostname.scm") 
= 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/keymap.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=6851, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/keymap.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/locale.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=7359, 
...}) = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/locale.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=106, 
...}) = 0
[pid  1153] openat(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt", 
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 8
[pid  1153] fstat(8, {st_mode=S_IFDIR|0755, st_size=106, ...}) = 0
[pid  1153] getdents64(8, 0x17de620 /* 7 entries */, 32768) = 208
[pid  1153] getdents64(8, 0x17de620 /* 0 entries */, 32768) = 0
[pid  1153] close(8)                    = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/ethernet.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=3189, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/ethernet.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/final.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=4768, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/final.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/hostname.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=1076, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/hostname.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/keymap.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=8720, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/keymap.scm") = 0
[pid  1153] statx(AT_FDCWD, 
"/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/locale.scm", 
AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_MODE|STATX_NLINK|STATX_SIZE, 
{stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=8727, 
...}) = 0
[pid  1153] 
unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/newt/locale.scm") = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer/newt") = -1 
EISDIR (Is a directory)
[pid  1153] rmdir("/gnu/store/nix-1153-0/unpacked/gnu/installer/newt") = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu/installer") = -1 EISDIR 
(Is a directory)
[pid  1153] rmdir("/gnu/store/nix-1153-0/unpacked/gnu/installer") = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked/gnu") = -1 EISDIR (Is a 
directory)
[pid  1153] rmdir("/gnu/store/nix-1153-0/unpacked/gnu") = 0
[pid  1153] unlink("/gnu/store/nix-1153-0/unpacked") = -1 EISDIR (Is a 
directory)
[pid  1153] rmdir("/gnu/store/nix-1153-0/unpacked") = 0
[pid  1153] unlink("/gnu/store/nix-1153-0") = -1 EISDIR (Is a directory)
[pid  1153] rmdir("/gnu/store/nix-1153-0") = 0
[pid  1153] rt_sigaction(SIGIO, {sa_handler=SIG_IGN, sa_mask=~[RTMIN RT_1], 
sa_flags=SA_RESTORER, sa_restorer=0x7f3e67632b20}, {sa_handler=SIG_IGN, 
sa_mask=~[KILL STOP RTMIN RT_1], sa_flags=SA_RESTORER, 
sa_restorer=0x7f3e67632b20}, 8) = 0
[pid  1153] write(2, "unexpected build daemon error: ", 31) = 31
[pid  1153] write(2, "unexpected end-of-file", 22) = 22
[pid  1153] write(2, "\n", 1)           = 1
[pid  1153] close(9)                    = 0
[pid  1153] unlink("/var/guix/temproots/1153") = 0
[pid  1153] stat("/var/guix/db/db.sqlite", {st_mode=S_IFREG|0644, 
st_size=197468160, ...}) = 0
[pid  1153] fcntl(5, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}) = 0
[pid  1153] fcntl(5, F_SETLK, {l_type=F_WRLCK, l_whence=SEEK_SET, 
l_start=1073741826, l_len=510}) = 0
[pid  1153] unlink("/var/guix/db/db.sqlite-shm") = 0
[pid  1153] munmap(0x7f3e672bb000, 32768) = 0
[pid  1153] close(7)                    = 0
[pid  1153] close(6)                    = 0
[pid  1153] unlink("/var/guix/db/db.sqlite-wal") = 0
[pid  1153] fcntl(5, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=2}) = 0
[pid  1153] fcntl(5, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=0, 
l_len=0}) = 0
[pid  1153] fstat(5, {st_mode=S_IFREG|0644, st_size=197468160, ...}) = 0
[pid  1153] stat("/var/guix/db/db.sqlite", {st_mode=S_IFREG|0644, 
st_size=197468160, ...}) = 0
[pid  1153] close(5)                    = 0
[pid  1153] close(3)                    = 0
[pid  1153] write(4, "ptxc\0\0\0\0\26\0\0\0\0\0\0\0unexpected 
end-of-file\0\0\1\0\0\0\0\0\0\0", 48) = -1 EPIPE (Broken pipe)
[pid  1153] --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=1153, 
si_uid=0} ---
[pid  1153] +++ killed by SIGPIPE +++
<... select resumed>)                   = ? ERESTARTNOHAND (To be restarted if 
no handler)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=1153, si_uid=0, 
si_status=SIGPIPE, si_utime=0, si_stime=0} ---
wait4(-1, NULL, WNOHANG, NULL)          = 1153
wait4(-1, NULL, WNOHANG, NULL)          = -1 ECHILD (No child processes)
rt_sigreturn({mask=[]})                 = -1 EINTR (Interrupted system call)
select(4, [3], NULL, NULL, NULL
--8<---------------cut here---------------end--------------->8---

Both machines are Guix Systems running commit
fdb77b3625effd8f7647f7545cd0030650b027bc.

Maxim
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