| "make update-download -j3" exit with 0. | 
 | "make update-src      -j3" exit with 0. | 
 | "make after-update    -j3" exit with 0. | 
 | "make miniruby -j3" exit with 0. | 
 | "make ruby -j3" exit with 0. | 
 | "make all -j3" exit with 0. | 
 | "make install -j3" exit with 0. | 
 | make yes-btest TESTOPTS='-q -j3' | 
 | $$$ #<Timeout::Error: execution expired> | 
 | ### enter analyzing mode for stuck processes | 
 | $$$ ps jx | 
 |    PPID     PID    PGID     SID TTY        TPGID STAT   UID   TIME COMMAND | 
 |       1    2547    2547    2547 ?             -1 Ss    1000   8:25 /usr/lib/systemd/systemd --user | 
 |    2547    2550    2547    2547 ?             -1 S     1000   0:00 (sd-pam) | 
 |       1    3030    3030    3030 ?             -1 Ss    1000   9:12 tmux | 
 |    3030    3031    3031    3031 pts/1     550734 Ss    1000   0:00 -bash | 
 |       1   51080  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestIOBuffer#test_shared | 
 |       1  104652  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2256_1408.rb | 
 |       1  110879  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestBeginEndBlock#test_internal_errinfo_at_exit | 
 |       1  178643  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestIOBuffer#test_shared | 
 |       1  504419  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestTimeout#test_fork | 
 |    3031  550734  550734    3031 pts/1     550734 S+    1000   2:07 sh build-loop.sh master --incremental | 
 |       1  570281  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestProcess#test_daemon_detached | 
 |       1  583958  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestTimeout#test_fork | 
 |       1  767462  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2013_1395.rb | 
 |       1  805450  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestProcess#test_daemon_noclose | 
 |       1  968356  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: JSONGeneratorTest#test_broken_bignum | 
 |       1 1010816  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2226_1406.rb | 
 |       1 1168951  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2226_1406.rb | 
 |       1 1279056  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestIOBuffer#test_shared | 
 |       1 1479478  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2013_1395.rb | 
 |       1 1499050  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestTimeout#test_fork | 
 |       1 1668105  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2030_1396.rb | 
 |       1 1904634 2286718    3031 pts/1     550734 S     1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: JSONGeneratorTest#test_broken_bignum | 
 |       1 2058937  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestFiberProcess#test_fork | 
 |       1 2135572  550734    3031 pts/1     550734 Sl+   1000 32538:59 /home/opc/ruby/build/master/ruby --parser=prism -W0 | 
 |  550734 2300639  550734    3031 pts/1     550734 Sl+   1000   0:00 ruby ./br.rb build_report master --incremental | 
 | 2300639 2328397  550734    3031 pts/1     550734 Sl+   1000   0:00 ruby /home/opc/build-ruby/build-ruby.rb --target_name=master --logfile=/home/opc/ruby/logs/brlog.master.20250730-105211 --root_dir=/home/opc/ruby --timeout=10800 --configure_opts=--disable-dtrace --disable-yjit --incremental | 
 | 2328397 2603233  550734    3031 pts/1     550734 S+    1000   0:00 make yes-btest TESTOPTS=-q -j3 | 
 | 2603233 2606861  550734    3031 pts/1     550734 Sl+   1000   0:02 /usr/local/bin/ruby --disable=gems /home/opc/ruby/src/master/bootstraptest/runner.rb --ruby=./miniruby -I/home/opc/ruby/src/master/lib -I. -I.ext/common  -r./aarch64-linux-fake --disable-gems -q -j3 | 
 |       1 2725834  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2013_1395.rb | 
 | 2606861 2755859  550734    3031 pts/1     550734 Z+    1000   0:00 [miniruby] <defunct> | 
 |       1 2755875  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2118_1402.rb | 
 |       1 2769870  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2118_1402.rb | 
 |       1 2813263  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestAutoload#test_autoload_fork | 
 |       1 2964324 2286718    3031 pts/1     550734 S     1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestIOBuffer#test_shared | 
 |       1 2977397  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestSyslog#test_log | 
 |       1 3028846  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestIOBuffer#test_shared | 
 |       1 3126227  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2030_1396.rb | 
 |       1 3195009 2286718    3031 pts/1     550734 S     1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestSyslog#test_log | 
 |       1 3220787  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2013_1394.rb | 
 |       1 3524312  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestSyslog#test_log | 
 |       1 3700981  550734    3031 pts/1     550734 S+    1000   0:00 /home/opc/ruby/src/master/tool/lib/test/unit/parallel.rb: TestSyslog#test_log | 
 |       1 3841424  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2013_1394.rb | 
 |       1 4053980  550734    3031 pts/1     550734 Sl+   1000   0:00 /home/opc/ruby/build/master/miniruby -I/home/opc/ruby/src/master/lib -I/home/opc/ruby/build/master -I/home/opc/ruby/build/master/.ext/common -r/home/opc/ruby/build/master/aarch64-linux-fake --disable-gems -W0 bootstraptest.test_ractor.rb_2013_1395.rb | 
 | 2328397 4061237  550734    3031 pts/1     550734 R+    1000   0:00 ps jx | 
 | {1=>[2547, 3030, 51080, 104652, 110879, 178643, 504419, 570281, 583958, 767462, 805450, 968356, 1010816, 1168951, 1279056, 1479478, 1499050, 1668105, 1904634, 2058937, 2135572, 2725834, 2755875, 2769870, 2813263, 2964324, 2977397, 3028846, 3126227, 3195009, 3220787, 3524312, 3700981, 3841424, 4053980], 2547=>[2550], 3030=>[3031], 3031=>[550734], 550734=>[2300639], 2300639=>[2328397], 2328397=>[2603233, 4061237], 2603233=>[2606861], 2606861=>[2755859]} | 
 | $ timeout 60 gdb -p 2755859 -x /home/opc/build-ruby/gdbscript -batch -quiet 2> /dev/null | 
 | >>> Threads | 
 | No threads. | 
 | >>> Machine level backtrace | 
 | >>> Dump Ruby level backtrace (if possible) | 
 | $ timeout 60 gdb -p 2606861 -x /home/opc/build-ruby/gdbscript -batch -quiet 2> /dev/null | 
 | [New LWP 2610801] | 
 | [New LWP 2610822] | 
 | [New LWP 2610832] | 
 | [Thread debugging using libthread_db enabled] | 
 | Using host libthread_db library "/lib64/libthread_db.so.1". | 
 | 0x0000fffbf214ed20 in ppoll () from /lib64/libc.so.6 | 
 | >>> Threads | 
 |   Id   Target Id                                           Frame  | 
 | * 1    Thread 0xfffbf2a86140 (LWP 2606861) "ruby"          0x0000fffbf214ed20 in ppoll () from /lib64/libc.so.6 | 
 |   2    Thread 0xfffbecf1f140 (LWP 2610801) "runner.rb:334" 0x0000fffbf221dd80 in pthread_cond_wait@@GLIBC_2.17 () from /lib64/libpthread.so.0 | 
 |   3    Thread 0xfffbec39f140 (LWP 2610822) "runner.rb:546" 0x0000fffbf214ec04 in poll () from /lib64/libc.so.6 | 
 |   4    Thread 0xfffbdf9cf140 (LWP 2610832) "runner.rb:638" 0x0000fffbf214ec04 in poll () from /lib64/libc.so.6 | 
 | >>> Machine level backtrace | 
 | Thread 4 (Thread 0xfffbdf9cf140 (LWP 2610832)): | 
 | #0  0x0000fffbf214ec04 in poll () from /lib64/libc.so.6 | 
 | No symbol table info available. | 
 | Thread 3 (Thread 0xfffbec39f140 (LWP 2610822)): | 
 | #0  0x0000fffbf214ec04 in poll () from /lib64/libc.so.6 | 
 | No symbol table info available. | 
 | Thread 2 (Thread 0xfffbecf1f140 (LWP 2610801)): | 
 | #0  0x0000fffbf221dd80 in pthread_cond_wait@@GLIBC_2.17 () from /lib64/libpthread.so.0 | 
 | No symbol table info available. | 
 | Thread 1 (Thread 0xfffbf2a86140 (LWP 2606861)): | 
 | #0  0x0000fffbf214ed20 in ppoll () from /lib64/libc.so.6 | 
 | No symbol table info available. | 
 | >>> Dump Ruby level backtrace (if possible) | 
 |  th: 0x15691150, native_id: 0xfffbf2a86140 | 
 | -- Control frame information ----------------------------------------------- | 
 | c:0012 p:0023 s:0074 e:000073 METHOD <internal:thread_sync>:18 | 
 | c:0011 p:0062 s:0067 E:000ef0 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:356 | 
 | c:0010 p:0052 s:0057 e:000056 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:438 | 
 | c:0009 p:0005 s:0049 e:000048 BLOCK  /home/opc/ruby/src/master/bootstraptest/runner.rb:311 | 
 | c:0008 p:0002 s:0046 e:000045 BLOCK  /home/opc/ruby/src/master/bootstraptest/runner.rb:861 [FINISH] | 
 | c:0007 p:---- s:0043 e:000042 CFUNC  :chdir | 
 | c:0006 p:0007 s:0038 e:000037 BLOCK  /home/opc/ruby/src/master/bootstraptest/runner.rb:860 | 
 | c:0005 p:0047 s:0034 e:000033 METHOD /usr/local/lib/ruby/3.2.0/tmpdir.rb:94 | 
 | c:0004 p:0030 s:0024 e:000023 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:859 | 
 | c:0003 p:0624 s:0019 e:000018 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:310 | 
 | c:0002 p:0220 s:0008 E:000a78 EVAL   /home/opc/ruby/src/master/bootstraptest/runner.rb:904 [FINISH] | 
 | c:0001 p:0000 s:0003 E:001ac0 DUMMY  [FINISH] | 
 | th: 0x15899d50, native_id: 0xfffbecf1f140 | 
 | -- Control frame information ----------------------------------------------- | 
 | c:0009 p:---- s:0056 e:000055 CFUNC  :value | 
 | c:0008 p:0042 s:0052 E:000168 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:552 | 
 | c:0007 p:0130 s:0043 E:0018b8 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:580 | 
 | c:0006 p:0010 s:0034 e:000033 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:384 | 
 | c:0005 p:0014 s:0022 E:000e58 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:536 | 
 | c:0004 p:0011 s:0015 E:000f88 BLOCK  /home/opc/ruby/src/master/bootstraptest/runner.rb:684 | 
 | c:0003 p:0006 s:0011 e:000010 METHOD /home/opc/ruby/src/master/bootstraptest/runner.rb:532 | 
 | c:0002 p:0011 s:0007 e:000006 BLOCK  /home/opc/ruby/src/master/bootstraptest/runner.rb:336 [FINISH] | 
 | c:0001 p:---- s:0003 e:000002 DUMMY  [FINISH] | 
 | th: 0xfffbe80de280, native_id: 0xfffbec39f140 | 
 | -- Control frame information ----------------------------------------------- | 
 | c:0003 p:---- s:0010 e:000009 CFUNC  :read | 
 | c:0002 p:0004 s:0006 e:000005 BLOCK  /home/opc/ruby/src/master/bootstraptest/runner.rb:546 [FINISH] | 
 | c:0001 p:---- s:0003 e:000002 DUMMY  [FINISH] | 
 | th: 0xfffbe803fd00, native_id: 0xfffbdf9cf140 | 
 | -- Control frame information ----------------------------------------------- | 
 | c:0003 p:---- s:0010 e:000009 CFUNC  :read | 
 | c:0002 p:0004 s:0006 e:000005 BLOCK  /home/opc/ruby/src/master/bootstraptest/runner.rb:638 [FINISH] | 
 | c:0001 p:---- s:0003 e:000002 DUMMY  [FINISH] | 
 | [Inferior 1 (process 2606861) detached] | 
 | $ timeout 60 gdb -p 2603233 -x /home/opc/build-ruby/gdbscript -batch -quiet 2> /dev/null | 
 | make: *** [uncommon.mk:913: yes-btest] Killed | 
 | >>> Threads | 
 | No threads. | 
 | >>> Machine level backtrace | 
 | >>> Dump Ruby level backtrace (if possible) | 
 | $ timeout 60 gdb -p 4061237 -x /home/opc/build-ruby/gdbscript -batch -quiet 2> /dev/null | 
 | >>> Threads | 
 | No threads. | 
 | >>> Machine level backtrace | 
 | >>> Dump Ruby level backtrace (if possible) | 
 | #<Errno::ESRCH: No such process> |