'ABDQ' => {
                       'id'   => '212197'
                       'wait' => {
                                   'p.txt' => 1,
                                   'q.txt' => 1,
                                 },
                       'done' => {
                                   'a.txt' => 1,
                                   'b.txt' => 1,
                                   'c.txt' => 1,
                                   'd.txt' => 1,
                                   'e.txt' => 1
                                 },
                    },
          ...

##</code><code>##

$SIG{SEGV} = sub { require Carp; Carp::confess(@_) };

##</code><code>##

-----------------  lwp# 1 / thread# 1  --------------------
 ff14247c realfree (2e66ada8, ff1c2858, ff1bc008, ff1c27c8, 2e301a21, 369390) + 70
 ff142010 _malloc_unlocked (1408, 0, ff1bc008, 1408, 367f78, 2) + 24c
 ff141da8 malloc   (1408, 0, 0, 0, 21eec, ff199b94) + 20
 ff18f224 _findbuf (112630, 5, ff1bc008, ffffffff, 1400, 5) + 94
 ff18f0d8 _filbuf  (112630, 1, 0, ff1bc008, 40, 40) + 54
 ff1939c4 getc     (112630, ff1c3a54, ff1bfcd8, 112630, 0, 0) + bc
 000d87ec PerlIOStdio_read (0, ffbed67f, 1, d87d0, 0, 0) + 1c
 000d6cd8 Perl_PerlIO_read (122030, ffbed67f, 1, d8a20, 0, 0) + 2c
 000da77c PerlIO_getc (122030, 0, 0, 7efefeff, 54e1f0, 0) + c
 0008ae00 Perl_sv_gets (2a9528, 122030, 0, 0, 216fc, 40) + 574
 000aca90 Perl_pp_backtick (117034, 0, 112800, 1, 290, 0) + 208
 00078850 Perl_runops_standard (112400, 301a00, 112800, 114ff4, eb478, 0) + 30
 00027848 S_run_body (1, 11250c, ffbef9c8, 0, 0, 0) + 150
 0002744c perl_run (0, 112800, 3, ffbefb04, 0, 0) + 90
 00024458 main     (0, ffbefb04, ffbefb14, 111fbc, 0, 0) + 94
 00024258 _start   (0, 0, 0, 0, 0, 0) + 5c
-----------------  lwp# 2 / thread# 2  --------------------
 ff19f204 _signotifywait (fef6c000, 0, 0, 0, ff1d18bc, fef6e000) + 8
 ff19a6a8 thr_errnop (0, 0, 0, 0, 0, 0) + 20
-----------------  lwp# 3  --------------------------------
 fef59300 private___lwp_cond_wait (4, fef6cd74, fef6c000, 0, 0, 4) + 8
 ff19ce00 _door_return (fef35cd8, fef4a380, 0, 0, 0, 0) + 68
-----------------  lwp# 4  --------------------------------
 ff19cda8 _door_return (4, fef6c000, fef6d678, 3, fef6c000, 1) + 10
 fef4a380 _lwp_start (fe20bd98, 0, 0, 0, 0, 0) + 18
 ff19a6a8 thr_errnop (0, 0, 0, 0, 0, 0) + 20
-----------------  lwp# 5  --------------------------------
 fef59300 private___lwp_cond_wait (4, fef6cd74, fef6c000, 3, fef6c000, 1) + 8
 fef4a380 _lwp_start (fe109d98, 0, 0, 0, 0, 0) + 18
 ff19a6a8 thr_errnop (0, 0, 0, 0, 0, 0) + 20
--------------------------  thread# 3  --------------------
 fef4d9e0 _reap_wait (fef70988, 1e8fc, 0, fef6c000, 0, 0) + 38
 fef4d738 _reaper  (fef6ce08, fef72710, fef70988, fef6cde0, 1, fe401000) + 38
 fef5b11c _thread_start (0, 0, 0, 0, 0, 0) + 40

##</code><code>##

libc.so.1`realfree+0x70(2e66ada8, ff1c2858, ff1bc008, ff1c27c8, 2e301a21, 369390)
libc.so.1`_malloc_unlocked+0x24c(1408, 0, ff1bc008, 1408, 367f78, 2)
libc.so.1`malloc+0x20(1408, 0, 0, 0, 21eec, ff199b94)
libc.so.1`_findbuf+0x94(112630, 5, ff1bc008, ffffffff, 1400, 5)
libc.so.1`_filbuf+0x54(112630, 1, 0, ff1bc008, 40, 40)
libc.so.1`getc+0xbc(112630, ff1c3a54, ff1bfcd8, 112630, 0, 0)
PerlIOStdio_read+0x1c(0, ffbed67f, 1, d87d0, 0, 0)
Perl_PerlIO_read+0x2c(122030, ffbed67f, 1, d8a20, 0, 0)
PerlIO_getc+0xc(122030, 0, 0, 7efefeff, 54e1f0, 0)
Perl_sv_gets+0x574(2a9528, 122030, 0, 0, 216fc, 40)
Perl_pp_backtick+0x208(117034, 0, 112800, 1, 290, 0)
Perl_runops_standard+0x30(112400, 301a00, 112800, 114ff4, eb478, 0)
S_run_body+0x150(1, 11250c, ffbef9c8, 0, 0, 0)
perl_run+0x90(0, 112800, 3, ffbefb04, 0, 0)
main+0x94(0, ffbefb04, ffbefb14, 111fbc, 0, 0)
_start+0x5c(0, 0, 0, 0, 0, 0)