make, 37 bytes

Result

WA

Duration

751ms

Code [DL]

for i in 1 2 3; do\
  echo $$i;\
done

stdin

591 465
985 582
258 857
996 683
371 121
349 664
129 215
614 119
699 497
794 646
659 564
548 486
922 423
745 332
172 221
344 997
671 194
955 582
826 568
788 746
483 672
233 336
822 264
488 889
526 262
481 516
449 143
377 998
552 225
755 386
749 244
317 117

stdout

stderr

/volume/CODE:1: *** missing separator.  Stop.

strace

11    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7fff459f24d0 /* 7 vars */) = 0
13    execve("/usr/bin/ag_launcher", ["/usr/bin/ag_launcher", "-i", "/usr/bin/make", "-f", "/volume/CODE"], 0x55818a8ae0a8 /* 7 vars */ <unfinished ...>
12    execve("/bin/cat", ["cat", "-"], 0x55818a8ae028 /* 7 vars */) = 0
13    <... execve resumed>)             = 0
13    execve("/usr/bin/make", ["/usr/bin/make", "-f", "/volume/CODE"], 0x55b390c6fda0 /* 8 vars */ <unfinished ...>
12    +++ exited with 0 +++
13    <... execve resumed>)             = 0
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
13    +++ exited with 2 +++
11    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13, si_uid=0, si_status=2, si_utime=0, si_stime=0} ---
11    +++ exited with 2 +++