On Mon, 04 Aug 2025 00:49:47 +0200
Antonio Diaz Diaz <anto...@gnu.org> wrote:

> Hi Sergei,
> 
> Sergei Trofimovich wrote:
> >      testing ed-1.22...
> >      *** The script
> > /home/slyfox/dev/tarballs/ed-1.22/testsuite/filter.ed exited
> > abnormally *** tests failed. Please, send a bug report to
> > bug-ed@gnu.org Include the (compressed) contents of
> > '/home/slyfox/dev/tarballs/ed-1.22/tmp' in the report.  
> 
> I have tried to reproduce the problem for almost an hour on two
> machines without success.

Aha, I was afraid of it being hard to reproduce. I tried on both NixOS
and Gentoo OSes. Each of the two reproduces the failure within 1-2
minutes.

> Does the file 'filter.log' exist in 'ed-1.22/tmp'? What does it
> contain?

Yes, there is a file:

$ cat tmp/filter.log
855
355
355

> > At a cursory glance the failure always happens around
> > `testsuite/filter.ed` test and is possibly related to signal
> > handling. Don't know more details.  
> 
> It may be a problem writing the temporary file. Without 'filter.log'
> it is difficult to know.

Here is slightly more directed reproducer:

$ while :; do echo ==RUN==; cp testsuite/test.txt test.txt; ./ed
test.txt < testsuite/filter.ed || break; done ==RUN==
855
355
355
63
0
16
0
146
146
788
...
==RUN==
855
355
355
63
0
16
0
146
146
788
==RUN==
855
355
355

`strace` output shows some difference. Looks like the process exit is
due to `SIGPIPE`.

$ while :; do echo ==RUN==; cp testsuite/test.txt test.txt; strace ./ed
test.txt < testsuite/filter.ed || break; done ...
==RUN==
execve("./ed", ["./ed", "test.txt"], 0x7fffae134608 /* 36 vars */) = 0
brk(NULL)                               = 0x55afa34bb000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f66437fd000 access("/etc/ld.so.preload", R_OK)      = -1 ENOENT
(No such file or directory) openat(AT_FDCWD, "/etc/ld.so.cache",
O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=53714,
...}) = 0 mmap(NULL, 53714, PROT_READ, MAP_PRIVATE, 3, 0) =
0x7f66437ef000 close(3)                                = 0
openat(AT_FDCWD, "/usr/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0t\2\0\0\0\0\0"...,
832) = 832 pread64(3,
"\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"...,
784, 64) = 784 fstat(3, {st_mode=S_IFREG|0755, st_size=1978624, ...}) =
0 pread64(3,
"\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"...,
784, 64) = 784 mmap(NULL, 2010200, PROT_READ,
MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f6643604000 mmap(0x7f6643628000,
1466368, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3,
0x24000) = 0x7f6643628000 mmap(0x7f664378e000, 339968, PROT_READ,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18a000) = 0x7f664378e000
mmap(0x7f66437e1000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1dc000) = 0x7f66437e1000
mmap(0x7f66437e7000, 31832, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f66437e7000 close(3)
                             = 0 mmap(NULL, 12288,
PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f6643601000 arch_prctl(ARCH_SET_FS, 0x7f6643601740) = 0
set_tid_address(0x7f6643601a10)         = 25873
set_robust_list(0x7f6643601a20, 24)     = 0 rseq(0x7f6643601680, 0x20,
0, 0x53053053) = 0 mprotect(0x7f66437e1000, 16384, PROT_READ) = 0
mprotect(0x55af7cfef000, 4096, PROT_READ) = 0 mprotect(0x7f664383c000,
8192, PROT_READ) = 0 prlimit64(0, RLIMIT_STACK, NULL,
{rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
munmap(0x7f66437ef000, 53714)           = 0
getrandom("\x61\xc2\xbb\xd7\x1e\x49\xaf\x67", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55afa34bb000
brk(0x55afa34dc000)                     = 0x55afa34dc000
openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC)
= 3 fstat(3, {st_mode=S_IFREG|0644, st_size=233217696, ...}) = 0
mmap(NULL, 233217696, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f6635600000
close(3)                                = 0 openat(AT_FDCWD, "/tmp",
O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3 fcntl(3, F_GETFL)
   = 0x418002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE) openat(AT_FDCWD,
"test.txt", O_RDWR)    = 4 fstat(4, {st_mode=S_IFREG|0644, st_size=855,
...}) = 0 read(4, "This natural inequality of the t"..., 4096) = 855
fstat(3, {st_mode=S_IFREG|0600, st_size=0, ...}) = 0 read(4, "", 4096)
                     = 0 close(4)                                = 0
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(0x88, 0), ...}) = 0
write(1, "855\n", 4855 )                    = 4 ioctl(0, TIOCGWINSZ,
0x7ffe4ec8e150)    = -1 ENOTTY (Inappropriate ioctl for device)
ioctl(0, TCGETS, 0x7ffe4ec8e0d0)        = -1 ENOTTY (Inappropriate
ioctl for device) rt_sigaction(SIGHUP, {sa_handler=0x55af7cfeb8b0,
sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART,
sa_restorer=0x7f66436414b0}, NULL, 8) = 0 rt_sigaction(SIGQUIT,
{sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART,
sa_restorer=0x7f66436414b0}, NULL, 8) = 0 rt_sigaction(SIGINT,
{sa_handler=0x55af7cfeb370, sa_mask=[],
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7f66436414b0}, NULL, 8)
= 0 read(0, "H", 1)                         = 1 read(0, "\n", 1)
                = 1 read(0, "6", 1)                         = 1 read(0,
",", 1)                         = 1 read(0, "1", 1)
    = 1 read(0, "0", 1)                         = 1 read(0, "!", 1)
                    = 1 read(0, "s", 1)                         = 1
read(0, "o", 1)                         = 1 read(0, "r", 1)
            = 1 read(0, "t", 1)                         = 1 read(0,
"\n", 1)                        = 1 getpid()
    = 25873 pipe2([4, 5], O_CLOEXEC)                = 0 prlimit64(0,
RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) =
0 mmap(NULL, 36864, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f66437f4000
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone3({flags=CLONE_VM|CLONE_VFORK|CLONE_CLEAR_SIGHAND,
exit_signal=SIGCHLD, stack=0x7f66437f4000, stack_size=0x9000}, 88) =
25874 munmap(0x7f66437f4000, 36864)           = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 close(4)
             = 0 fcntl(5, F_SETFD, 0)                    = 0 write(3,
"This natural inequality of the t"..., 842) = 842 lseek(3, 0, SEEK_SET)
                  = 0 read(3, "This natural inequality of the t"...,
4096) = 842 fstat(5, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
write(5, "comparison of this. I see no way"..., 355) = 355 close(5)
                           = 0 wait4(25874, [{WIFEXITED(s) &&
WEXITSTATUS(s) == 0}], 0, NULL) = 25874 --- SIGCHLD {si_signo=SIGCHLD,
si_code=CLD_EXITED, si_pid=25874, si_uid=0, si_status=0, si_utime=0,
si_stime=0} --- write(1, "355\n", 4355 )                    = 4
openat(AT_FDCWD, "/tmp/ed-pyj", O_RDWR) = 4 fstat(4,
{st_mode=S_IFREG|0644, st_size=355, ...}) = 0 read(4, "agrarian
regulations in their ut"..., 4096) = 355 fstat(3,
{st_mode=S_IFREG|0600, st_size=842, ...}) = 0 lseek(3, 0, SEEK_SET)
              = 0 read(3, "This natural inequality of the t"..., 4096)
= 842 read(4, "", 4096)                       = 0
close(4)                                = 0
write(1, "355\n", 4355
)                    = 4
unlink("/tmp/ed-pyj")                   = 0
read(0, "s", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "^", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "1", 1)                         = 1
read(0, "0", 1)                         = 1
read(0, " ", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "\n", 1)                        = 1
openat(AT_FDCWD, "/usr/lib64/gconv/gconv-modules.cache",
O_RDONLY|O_CLOEXEC) = 4 fstat(4, {st_mode=S_IFREG|0644, st_size=27012,
...}) = 0 mmap(NULL, 27012, PROT_READ, MAP_SHARED, 4, 0) =
0x7f66437f6000 close(4)                                = 0
futex(0x7f66437e672c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
write(3, "agrarian regulations in their ut"..., 350) = 350
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1192
fstat(3, {st_mode=S_IFREG|0600, st_size=1192, ...}) = 0
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1192
read(0, "1", 1)                         = 1
read(0, "!", 1)                         = 1
read(0, ":", 1)                         = 1
read(0, "\n", 1)                        = 1
pipe2([4, 5], O_CLOEXEC)                = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) =
0 prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024})
= 0 mmap(NULL, 36864, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f66435f8000
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone3({flags=CLONE_VM|CLONE_VFORK|CLONE_CLEAR_SIGHAND,
exit_signal=SIGCHLD, stack=0x7f66435f8000, stack_size=0x9000}, 88) =
25876 munmap(0x7f66435f8000, 36864)           = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 close(4)
             = 0 fcntl(5, F_SETFD, 0)                    = 0 write(3,
"10 of this law which pervades al"..., 74) = 74 lseek(3, 0, SEEK_SET)
                = 0 read(3, "This natural inequality of the t"...,
4096) = 1266 fstat(5, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
write(5, "This natural inequality of the t"..., 63) = 63
close(5)                                = 0
wait4(25876, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 25876
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=25876,
si_uid=0, si_status=0, si_utime=0, si_stime=0} --- write(1, "63\n", 363
)                     = 3
openat(AT_FDCWD, "/tmp/ed-pyj", O_RDWR) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
read(4, "", 4096)                       = 0
close(4)                                = 0
write(1, "0\n", 20
)                      = 2
unlink("/tmp/ed-pyj")                   = 0
read(0, "s", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "^", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, " ", 1)                         = 1
read(0, "1", 1)                         = 1
read(0, " ", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "\n", 1)                        = 1
fstat(3, {st_mode=S_IFREG|0600, st_size=1266, ...}) = 0
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1266
read(0, "$", 1)                         = 1
read(0, "!", 1)                         = 1
read(0, ":", 1)                         = 1
read(0, "\n", 1)                        = 1
pipe2([4, 5], O_CLOEXEC)                = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) =
0 prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024})
= 0 mmap(NULL, 36864, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f66435f8000
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone3({flags=CLONE_VM|CLONE_VFORK|CLONE_CLEAR_SIGHAND,
exit_signal=SIGCHLD, stack=0x7f66435f8000, stack_size=0x9000}, 88) =
25877 munmap(0x7f66435f8000, 36864)           = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 close(4)
             = 0 fcntl(5, F_SETFD, 0)                    = 0 write(3, "
1 production in the earth, and "..., 71) = 71 lseek(3, 0, SEEK_SET)
              = 0 read(3, "This natural inequality of the t"..., 4096)
= 1337 fstat(5, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
write(5, "their families.\n", 16)       = 16
close(5)                                = 0
wait4(25877, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 25877
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=25877,
si_uid=0, si_status=0, si_utime=0, si_stime=0} --- write(1, "16\n", 316
)                     = 3
openat(AT_FDCWD, "/tmp/ed-pyj", O_RDWR) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
read(4, "", 4096)                       = 0
close(4)                                = 0
write(1, "0\n", 20
)                      = 2
unlink("/tmp/ed-pyj")                   = 0
read(0, "s", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "^", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "1", 1)                         = 1
read(0, "1", 1)                         = 1
read(0, " ", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "\n", 1)                        = 1
lseek(3, 1337, SEEK_SET)                = 1337
fstat(3, {st_mode=S_IFREG|0600, st_size=1337, ...}) = 0
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1337
read(0, "$", 1)                         = 1
read(0, "-", 1)                         = 1
read(0, "1", 1)                         = 1
read(0, ",", 1)                         = 1
read(0, "$", 1)                         = 1
read(0, "!", 1)                         = 1
read(0, "s", 1)                         = 1
read(0, "o", 1)                         = 1
read(0, "r", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, "\n", 1)                        = 1
pipe2([4, 5], O_CLOEXEC)                = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) =
0 prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024})
= 0 mmap(NULL, 36864, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f66435f8000
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone3({flags=CLONE_VM|CLONE_VFORK|CLONE_CLEAR_SIGHAND,
exit_signal=SIGCHLD, stack=0x7f66435f8000, stack_size=0x9000}, 88) =
25878 munmap(0x7f66435f8000, 36864)           = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 close(4)
             = 0 fcntl(5, F_SETFD, 0)                    = 0 write(3,
"11 no anxiety about providing th"..., 73) = 73 lseek(3, 0, SEEK_SET)
                = 0 read(3, "This natural inequality of the t"...,
4096) = 1410 fstat(5, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
lseek(3, 1410, SEEK_SET)                = 1410
write(5, "which should live in ease, happi"..., 146) = 146
close(5)                                = 0
wait4(25878, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 25878
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=25878,
si_uid=0, si_status=0, si_utime=0, si_stime=0} --- write(1, "146\n",
4146 )                    = 4
openat(AT_FDCWD, "/tmp/ed-pyj", O_RDWR) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=146, ...}) = 0
read(4, "11 no anxiety about providing th"..., 4096) = 146
fstat(3, {st_mode=S_IFREG|0600, st_size=1410, ...}) = 0
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1410
read(4, "", 4096)                       = 0
close(4)                                = 0
write(1, "146\n", 4146
)                    = 4
unlink("/tmp/ed-pyj")                   = 0
read(0, "s", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "^", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "1", 1)                         = 1
read(0, "1", 1)                         = 1
read(0, " ", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "\n", 1)                        = 1
write(3, "11 no anxiety about providing th"..., 144) = 144
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1554
fstat(3, {st_mode=S_IFREG|0600, st_size=1554, ...}) = 0
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1554
read(0, "w", 1)                         = 1
read(0, "q", 1)                         = 1
read(0, " ", 1)                         = 1
read(0, "o", 1)                         = 1
read(0, "u", 1)                         = 1
read(0, "t", 1)                         = 1
read(0, ".", 1)                         = 1
read(0, "o", 1)                         = 1
read(0, "\n", 1)                        = 1
openat(AT_FDCWD, "out.o", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 4
write(3, "11 which should live in ease, ha"..., 74) = 74
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1628
fstat(4, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
lseek(3, 1628, SEEK_SET)                = 1628
lseek(3, 1628, SEEK_SET)                = 1628
lseek(3, 1628, SEEK_SET)                = 1628
lseek(3, 1628, SEEK_SET)                = 1628
lseek(3, 1628, SEEK_SET)                = 1628
write(4, " 1 production in the earth, and "..., 788) = 788
close(4)                                = 0
write(1, "788\n", 4788
)                    = 4
exit_group(0)                           = ?
+++ exited with 0 +++
==RUN==
execve("./ed", ["./ed", "test.txt"], 0x7fffd2105148 /* 36 vars */) = 0
brk(NULL)                               = 0x5630aa680000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7fe19d1f3000 access("/etc/ld.so.preload", R_OK)      = -1 ENOENT
(No such file or directory) openat(AT_FDCWD, "/etc/ld.so.cache",
O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=53714,
...}) = 0 mmap(NULL, 53714, PROT_READ, MAP_PRIVATE, 3, 0) =
0x7fe19d1e5000 close(3)                                = 0
openat(AT_FDCWD, "/usr/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0t\2\0\0\0\0\0"...,
832) = 832 pread64(3,
"\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"...,
784, 64) = 784 fstat(3, {st_mode=S_IFREG|0755, st_size=1978624, ...}) =
0 pread64(3,
"\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"...,
784, 64) = 784 mmap(NULL, 2010200, PROT_READ,
MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fe19cffa000 mmap(0x7fe19d01e000,
1466368, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3,
0x24000) = 0x7fe19d01e000 mmap(0x7fe19d184000, 339968, PROT_READ,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x18a000) = 0x7fe19d184000
mmap(0x7fe19d1d7000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1dc000) = 0x7fe19d1d7000
mmap(0x7fe19d1dd000, 31832, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fe19d1dd000 close(3)
                             = 0 mmap(NULL, 12288,
PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fe19cff7000 arch_prctl(ARCH_SET_FS, 0x7fe19cff7740) = 0
set_tid_address(0x7fe19cff7a10)         = 25883
set_robust_list(0x7fe19cff7a20, 24)     = 0 rseq(0x7fe19cff7680, 0x20,
0, 0x53053053) = 0 mprotect(0x7fe19d1d7000, 16384, PROT_READ) = 0
mprotect(0x563094901000, 4096, PROT_READ) = 0 mprotect(0x7fe19d232000,
8192, PROT_READ) = 0 prlimit64(0, RLIMIT_STACK, NULL,
{rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
munmap(0x7fe19d1e5000, 53714)           = 0
getrandom("\x5a\xfa\x4e\x03\x47\x38\xbc\x87", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x5630aa680000
brk(0x5630aa6a1000)                     = 0x5630aa6a1000
openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC)
= 3 fstat(3, {st_mode=S_IFREG|0644, st_size=233217696, ...}) = 0
mmap(NULL, 233217696, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe18f000000
close(3)                                = 0 openat(AT_FDCWD, "/tmp",
O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3 fcntl(3, F_GETFL)
   = 0x418002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE) openat(AT_FDCWD,
"test.txt", O_RDWR)    = 4 fstat(4, {st_mode=S_IFREG|0644, st_size=855,
...}) = 0 read(4, "This natural inequality of the t"..., 4096) = 855
fstat(3, {st_mode=S_IFREG|0600, st_size=0, ...}) = 0 read(4, "", 4096)
                     = 0 close(4)                                = 0
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(0x88, 0), ...}) = 0
write(1, "855\n", 4855 )                    = 4 ioctl(0, TIOCGWINSZ,
0x7ffe02ed7af0)    = -1 ENOTTY (Inappropriate ioctl for device)
ioctl(0, TCGETS, 0x7ffe02ed7a70)        = -1 ENOTTY (Inappropriate
ioctl for device) rt_sigaction(SIGHUP, {sa_handler=0x5630948fd8b0,
sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART,
sa_restorer=0x7fe19d0374b0}, NULL, 8) = 0 rt_sigaction(SIGQUIT,
{sa_handler=SIG_IGN, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART,
sa_restorer=0x7fe19d0374b0}, NULL, 8) = 0 rt_sigaction(SIGINT,
{sa_handler=0x5630948fd370, sa_mask=[],
sa_flags=SA_RESTORER|SA_RESTART, sa_restorer=0x7fe19d0374b0}, NULL, 8)
= 0 read(0, "H", 1)                         = 1 read(0, "\n", 1)
                = 1 read(0, "6", 1)                         = 1 read(0,
",", 1)                         = 1 read(0, "1", 1)
    = 1 read(0, "0", 1)                         = 1 read(0, "!", 1)
                    = 1 read(0, "s", 1)                         = 1
read(0, "o", 1)                         = 1 read(0, "r", 1)
            = 1 read(0, "t", 1)                         = 1 read(0,
"\n", 1)                        = 1 getpid()
    = 25883 pipe2([4, 5], O_CLOEXEC)                = 0 prlimit64(0,
RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) =
0 mmap(NULL, 36864, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fe19d1ea000
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone3({flags=CLONE_VM|CLONE_VFORK|CLONE_CLEAR_SIGHAND,
exit_signal=SIGCHLD, stack=0x7fe19d1ea000, stack_size=0x9000}, 88) =
25884 munmap(0x7fe19d1ea000, 36864)           = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 close(4)
             = 0 fcntl(5, F_SETFD, 0)                    = 0 write(3,
"This natural inequality of the t"..., 842) = 842 lseek(3, 0, SEEK_SET)
                  = 0 read(3, "This natural inequality of the t"...,
4096) = 842 fstat(5, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
write(5, "comparison of this. I see no way"..., 355) = 355 close(5)
                           = 0 wait4(25884, [{WIFEXITED(s) &&
WEXITSTATUS(s) == 0}], 0, NULL) = 25884 --- SIGCHLD {si_signo=SIGCHLD,
si_code=CLD_EXITED, si_pid=25884, si_uid=0, si_status=0, si_utime=0,
si_stime=0} --- write(1, "355\n", 4355 )                    = 4
openat(AT_FDCWD, "/tmp/ed-zyj", O_RDWR) = 4 fstat(4,
{st_mode=S_IFREG|0644, st_size=355, ...}) = 0 read(4, "agrarian
regulations in their ut"..., 4096) = 355 fstat(3,
{st_mode=S_IFREG|0600, st_size=842, ...}) = 0 lseek(3, 0, SEEK_SET)
              = 0 read(3, "This natural inequality of the t"..., 4096)
= 842 read(4, "", 4096)                       = 0
close(4)                                = 0
write(1, "355\n", 4355
)                    = 4
unlink("/tmp/ed-zyj")                   = 0
read(0, "s", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "^", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "1", 1)                         = 1
read(0, "0", 1)                         = 1
read(0, " ", 1)                         = 1
read(0, "/", 1)                         = 1
read(0, "\n", 1)                        = 1
openat(AT_FDCWD, "/usr/lib64/gconv/gconv-modules.cache",
O_RDONLY|O_CLOEXEC) = 4 fstat(4, {st_mode=S_IFREG|0644, st_size=27012,
...}) = 0 mmap(NULL, 27012, PROT_READ, MAP_SHARED, 4, 0) =
0x7fe19d1ec000 close(4)                                = 0
futex(0x7fe19d1dc72c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
write(3, "agrarian regulations in their ut"..., 350) = 350
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1192
fstat(3, {st_mode=S_IFREG|0600, st_size=1192, ...}) = 0
lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1192
read(0, "1", 1)                         = 1
read(0, "!", 1)                         = 1
read(0, ":", 1)                         = 1
read(0, "\n", 1)                        = 1
pipe2([4, 5], O_CLOEXEC)                = 0
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024}) =
0 prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=512*1024})
= 0 mmap(NULL, 36864, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fe19cfee000
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone3({flags=CLONE_VM|CLONE_VFORK|CLONE_CLEAR_SIGHAND,
exit_signal=SIGCHLD, stack=0x7fe19cfee000, stack_size=0x9000}, 88) =
25886 munmap(0x7fe19cfee000, 36864)           = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 close(4)
             = 0 fcntl(5, F_SETFD, 0)                    = 0 ---
SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=25886, si_uid=0,
si_status=0, si_utime=0, si_stime=0} --- write(3, "10 of this law which
pervades al"..., 74) = 74 lseek(3, 0, SEEK_SET)                   = 0
read(3, "This natural inequality of the t"..., 4096) = 1266 fstat(5,
{st_mode=S_IFIFO|0600, st_size=0, ...}) = 0 write(5, "This natural
inequality of the t"..., 63) = -1 EPIPE (Broken pipe) --- SIGPIPE
{si_signo=SIGPIPE, si_code=SI_USER, si_pid=25883, si_uid=0} --- +++
killed by SIGPIPE +++

-- 

  Sergei

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