February 2025 - ruby-core - ml.ruby-lang.org

[ruby-core:120738] [Ruby master Bug#21048] [Prism] rescue in modifier form with condition behaves differently
by Earlopain (Earlopain _) 14 Jun '25

14 Jun '25

Issue #21048 has been reported by Earlopain (Earlopain _). ---------------------------------------- Bug #21048: [Prism] rescue in modifier form with condition behaves differently https://bugs.ruby-lang.org/issues/21048 * Author: Earlopain (Earlopain _) * Status: Open * ruby -v: 3.4.1 * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- With the following code there is a discrepancy in how prism and parse.y consider precedence: ```rb $called = false def foo $called = true end foo rescue nil if false puts "Called: #{$called}" ``` Prism interprets it as `(foo rescue nil) if false`, not calling the method. `parse.y` does `foo rescue (nil if false)` since at least Ruby 2.0 ```sh $ ruby -v ruby 3.5.0dev (2025-01-19T12:44:20Z master f27ed98eff) +PRISM [x86_64-linux] $ ruby code.rb Called: true $ ruby --parser=parse.y code.rb Called: false ``` -- https://bugs.ruby-lang.org/

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[ruby-core:118577] [Ruby master Bug#20631] Build failure with Xcode 16 beta and macOS 15 (Sequoia) Beta
by hsbt (Hiroshi SHIBATA) 11 Jun '25

11 Jun '25

Issue #20631 has been reported by hsbt (Hiroshi SHIBATA). ---------------------------------------- Bug #20631: Build failure with Xcode 16 beta and macOS 15 (Sequoia) Beta https://bugs.ruby-lang.org/issues/20631 * Author: hsbt (Hiroshi SHIBATA) * Status: Open * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- I found some issues with Xcode 16 beta and macOS 15 (Sequoia) Beta. `TestRubyOptions` and `TestVMDump` are failed with them. full log: https://gist.github.com/hsbt/378fe2ba47e734f2562ba9a154e1795b I'm not sure why macOS require `sudo` command for that. ---- And I and @katei also found the regression of https://bugs.ruby-lang.org/issues/18912#note-15. ``` >> pid = fork { p File.realpath "/" } >> Process.waitpid(pid) objc[82573]: +[NSPlaceholderMutableString initialize] may have been in progress in another thread when fork() was called. objc[82573]: +[NSPlaceholderMutableString initialize] may have been in progress in another thread when fork() was called. We cannot safely call it or ignore it in the fork() child process. Crashing instead. Set a breakpoint on objc_initializeAfterForkError to debug. => 82573 ``` -- https://bugs.ruby-lang.org/

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[ruby-core:118412] [Ruby master Misc#20600] @ruby-lang.org has been migrated to Cloudflare
by shugo (Shugo Maeda) 10 Jun '25

10 Jun '25

Issue #20600 has been reported by shugo (Shugo Maeda). ---------------------------------------- Misc #20600: @ruby-lang.org has been migrated to Cloudflare https://bugs.ruby-lang.org/issues/20600 * Author: shugo (Shugo Maeda) * Status: Open ---------------------------------------- @ruby-lang.org has been migrated to Cloudflare, because ruby-lang.org was migrated from Google Domains to Squarespace, and Squarespace's e-mail forwarding doesn't work with custom MX records including subdomains:( I and Shibata-san are adding e-mail routing rules on Cloudflare, so if you have an e-mail address on ruby-lang.org, please verify the e-mail routing address when receiving an email from Cloudflare. -- https://bugs.ruby-lang.org/

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[ruby-core:119683] [Ruby master Feature#20861] Add an environment variable for tuning the default thread quantum
by tenderlovemaking (Aaron Patterson) 08 Jun '25

08 Jun '25

Issue #20861 has been reported by tenderlovemaking (Aaron Patterson). ---------------------------------------- Feature #20861: Add an environment variable for tuning the default thread quantum https://bugs.ruby-lang.org/issues/20861 * Author: tenderlovemaking (Aaron Patterson) * Status: Open ---------------------------------------- The default thread quantum is currently [hard coded at 100ms](https://github.com/ruby/ruby/blob/c7708d22c33040a74ea7ac683bf7407d37…. This can impact multithreaded systems that are trying to process Ruby level CPU bound work at the same time as IO work. I would like to add an environment variable `RUBY_THREAD_DEFAULT_QUANTUM_MS` that allows users to specify the default thread quantum (in milliseconds) via an environment variable. It defaults to our current default of 100ms. I've submitted the patch [here](https://github.com/ruby/ruby/pull/11981). Here is a Ruby program to demonstrate the problem: ```ruby def measure x = Process.clock_gettime(Process::CLOCK_MONOTONIC) yield Process.clock_gettime(Process::CLOCK_MONOTONIC) - x end def fib(n) if n < 2 n else fib(n-2) + fib(n-1) end end # find fib that takes ~500ms fib_i = 50.times.find { |i| measure { fib(i) } >= 0.05 } sleep_i = measure { fib(fib_i) } threads = [ Thread.new { 100.times { sleep(sleep_i) # sometimes stalled waiting for fib's quantum to finish } puts "done 1" }, Thread.new { 100.times { fib(fib_i) }; puts "done 2" }, ] # We expect the total time to be about 100 * sleep_i (~5 seconds) because # theoretically the sleep thread could be done nearly completely in parallel to # the fib thread. # # But because the `sleep` thread is iterating over the sleep call, it must wait # for the `fib` thread to complete its quantum, before it can start the next iteration. # # This means each sleep iteration could take up to `sleep_i + 100ms` # # We're calling that stalled time "waste" total = measure { threads.each(&:join) } waste = total - (sleep_i * 100) p TOTAL: total, WASTE: waste ``` The program has two threads. One thread is using CPU time by computing `fib` in a loop. The other thread is simulating IO time by calling `sleep` in a loop. When the `sleep` call completes, it can stall, waiting for the quantum in the fib thread to expire. That means that each iteration on sleep can actually take `sleep time + thread quantum`, or in this case ~600ms when we expected it to only take ~500ms. Ideally, the above program would take `500ms * 100` since all `sleep` calls should be able to execute in parallel with the `fib` calls. Of course this isn't true because the sleep thread must acquire the GVL before it can continue the next iteration, so there will always be _some_ overhead. This feature is for allowing people to tune that overhead. If we run this program with the default quantum the output looks like this: ``` $ ./miniruby -v fibtest.rb ruby 3.4.0dev (2024-11-01T14:49:50Z quantum-computing c7708d22c3) +PRISM [arm64-darwin24] done 2 done 1 {TOTAL: 12.672821999993175, WASTE: 4.960721996147186} ``` The output shows that our program spent about 5 seconds stalled, waiting to acquire the GVL. With this patch we can lower the default quantum, and the output is like this: ``` $ RUBY_THREAD_DEFAULT_QUANTUM_MS=10 ./miniruby -v fibtest.rb ruby 3.4.0dev (2024-11-01T22:06:35Z quantum-computing 087500643d) +PRISM [arm64-darwin24] done 2 done 1 {TOTAL: 8.898526000091806, WASTE: 1.4168260043952614} ``` Specifying the ENV to change the quantum to 10ms lowered our waste in the program to ~1.4 seconds. It's common for web applications to do mixed CPU and IO bound tasks in threads (see the Puma webserver), so it would be great if there was a way to customize the thread quantum depending on your application's workload. -- https://bugs.ruby-lang.org/

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[ruby-core:115981] [Ruby master Bug#20105] Introduce `IO::Stream` or something similar.
by ioquatix (Samuel Williams) 07 Jun '25

07 Jun '25

Issue #20105 has been reported by ioquatix (Samuel Williams). ---------------------------------------- Bug #20105: Introduce `IO::Stream` or something similar. https://bugs.ruby-lang.org/issues/20105 * Author: ioquatix (Samuel Williams) * Status: Open * Priority: Normal * Assignee: ioquatix (Samuel Williams) * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Ruby's IO class has a general model for streaming IO, including some hidden classes like `IO::generic_readable` and `IO::generic_writable`. As Ruby's core IO classes evolve, gems like `openssl` (see `OpenSSL::Buffering`) need to be updated to support changes to the interface. As it stands, there are changes in `IO` which are not copied to `OpenSSL::Buffering`. I'd like to propose we introduce some shared interface for streams that is used by `IO`, `Socket`, and `OpenSSL` to start with. The general interface would be similar to `IO` and allow code like `OpenSSL` to avoid re-implementing the `IO` interface. -- https://bugs.ruby-lang.org/

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[ruby-core:121182] [Ruby master Bug#21158] Ractor using 'receive_if' sits in busy wait when there are skipped messages in the incoming queue
by NeilW (Neil Wilson) 06 Jun '25

06 Jun '25

Issue #21158 has been reported by NeilW (Neil Wilson). ---------------------------------------- Bug #21158: Ractor using 'receive_if' sits in busy wait when there are skipped messages in the incoming queue https://bugs.ruby-lang.org/issues/21158 * Author: NeilW (Neil Wilson) * Status: Open * ruby -v: ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM [x86_64-linux] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- When using the conditional receive example from the Ractor documentation (either as a script, or within irb) <pre> r = Ractor.new do val = Ractor.receive_if{|msg| msg.is_a?(Array)} puts "Received successfully: #{val}" end r.send(1) r.send('test') </pre> ruby will sit in busy wait, pegging the processor at 100%, until it gets a message that matches the condition. Within irb it will often stop the REPL responding. The same problem occurs on ruby 3.02, 3.3.7 and 3.4.1 -- https://bugs.ruby-lang.org/

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[ruby-core:120859] [Ruby master Bug#21108] C-c (SIGINT) crashes ruby when looping Ractors are not taken?
by osyoyu (Daisuke Aritomo) 06 Jun '25

06 Jun '25

Issue #21108 has been reported by osyoyu (Daisuke Aritomo). ---------------------------------------- Bug #21108: C-c (SIGINT) crashes ruby when looping Ractors are not taken? https://bugs.ruby-lang.org/issues/21108 * Author: osyoyu (Daisuke Aritomo) * Status: Open * ruby -v: ruby 3.5.0dev (2025-01-27T08:19:32Z master c3c7300b89) +PRISM [x86_64-linux] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- Hitting C-c causes ruby to crash under these circumstances. ## Repro Hit C-c while the program is running. ```ruby r1 = Ractor.new do ary = [] loop do Ractor.receive Ractor.yield ary.push(1) end end r2 = Ractor.new(r1) do |r1| loop do |i| r1.send(nil) r1.take end end # r1.take # `take`ing r1 will fix this issue r2.take ``` ### Expected The process quits. ### Actual An `[BUG] unreachable` occurs. The rb_bug() is called inside `ractor_try_yield`. https://github.com/ruby/ruby/blob/ace39a3ed40cc32ff8d48893173413a7e05b8316/… ``` wrap.rb:1: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues. <internal:ractor>:644: [BUG] unreachable ruby 3.5.0dev (2025-01-27T08:19:32Z master c3c7300b89) +PRISM [x86_64-linux] -- Control frame information ----------------------------------------------- c:0005 p:0003 s:0022 e:000021 METHOD <internal:ractor>:644 c:0004 p:0014 s:0015 e:000014 BLOCK wrap.rb:5 c:0003 p:0017 s:0012 e:000011 METHOD <internal:kernel>:168 c:0002 p:0008 s:0007 e:000006 BLOCK wrap.rb:3 [FINISH] c:0001 p:---- s:0003 e:000002 DUMMY [FINISH] -- Ruby level backtrace information ---------------------------------------- wrap.rb:3:in 'block in <main>' <internal:kernel>:168:in 'loop' wrap.rb:5:in 'block (2 levels) in <main>' <internal:ractor>:644:in 'yield' -- Threading information --------------------------------------------------- Total ractor count: 2 Ruby thread count for this ractor: 1 -- C level backtrace information ------------------------------------------- ruby(0x639a516dc55a) [0x639a516dc55a] [0x639a512af8dd] [0x639a512a3a31] [0x639a513876a1] [0x639a513877a6] [0x639a5149b0b3] [0x639a51487565] [0x639a514317db] [0x639a51433e71] [0x639a51434295] ``` See full log at: https://gist.github.com/osyoyu/2ae4fe3e41c139703bab5c321a81dda5 -- https://bugs.ruby-lang.org/

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[ruby-core:117216] [Ruby master Bug#20346] FiberScheduler.unblock not called by Thread#join when Thread body contains Ractor.take
by forthoney (Seong-Heon Jung) 05 Jun '25

05 Jun '25

Issue #20346 has been reported by forthoney (Seong-Heon Jung). ---------------------------------------- Bug #20346: FiberScheduler.unblock not called by Thread#join when Thread body contains Ractor.take https://bugs.ruby-lang.org/issues/20346 * Author: forthoney (Seong-Heon Jung) * Status: Open * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- When using a `Ractor.take` inside a different thread, `Thread#join` on the thread running `Ractor.take` fails to call `FiberScheduler.unblock`. The below code can replicate this behavior ```ruby require "async" class RactorWrapper def initialize @ractor = Ractor.new do Ractor.recv # Ractor doesn't start until explicitly told to # Do some calculations fib = ->(x) { x < 2 ? 1 : fib.call(x - 1) + fib.call(x - 2) } fib.call(20) end end def take_async @ractor.send(nil) Thread.new { @ractor.take }.join.value end end Async do |task| 10000.times do |i| task.async do RactorWrapper.new.take_async puts i end end end ``` The above code deadlocks, and when we leave a debugging print statement inside of `Async`'s scheduler's `block` and `unblock` method, we can confirm that we only call `Scheduler.block`, and never `Scheduler.unblock` -- https://bugs.ruby-lang.org/

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[ruby-core:120510] [Ruby master Bug#21007] Ractor scheduler issue when multiple threads in a ractor
by luke-gru (Luke Gruber) 05 Jun '25

05 Jun '25

Issue #21007 has been reported by luke-gru (Luke Gruber). ---------------------------------------- Bug #21007: Ractor scheduler issue when multiple threads in a ractor https://bugs.ruby-lang.org/issues/21007 * Author: luke-gru (Luke Gruber) * Status: Open * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- When there are multiple threads in a ractor, these threads can get in a state where they are yielding every 10ms instead of every 100ms. This occurs because in `thread_sched_switch0`, which is called by `thread_sched_switch`, `ruby_thread_set_native` is called. This function calls `rb_ractor_set_current_ec` for the next thread to run, but then when the next thread sets itself up before it runs, it calls `rb_ractor_thread_switch`, but since the ec has already been changed, it never sets back `th->running_time_us` to `0`. The yielding happens every 10ms because a very large value in `th->running_time_us` is always compared to `100ms` so it always yields. This script takes a very long time due to this issue: ```ruby ractors = 5.times.map do |i| Ractor.new(i) do |i0| ts = 4.times.map do Thread.new do counter = 0 while counter < 30_000_000 counter += 1 end end end until ts.none? { |t| t.alive? } $stderr.puts "Ractor #{i0} main thread sleeping" sleep 1 end ts.each(&:join) $stderr.puts "Ractor #{i0} done" end end while ractors.any? r, obj = Ractor.select *ractors ractors.delete(r) end ``` The fix is to set `next_th->running_time_us` back to 0 in `thread_sched_switch0`. -- https://bugs.ruby-lang.org/

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[ruby-core:119991] [Ruby master Bug#20905] Ruby VM hangs while using ractors
by ivoanjo (Ivo Anjo) 05 Jun '25

05 Jun '25

Issue #20905 has been reported by ivoanjo (Ivo Anjo). ---------------------------------------- Bug #20905: Ruby VM hangs while using ractors https://bugs.ruby-lang.org/issues/20905 * Author: ivoanjo (Ivo Anjo) * Status: Open * ruby -v: ruby 3.4.0preview2 (2024-10-07 master 32c733f57b) +PRISM [x86_64-linux] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Hey! While doing some experiments with Ractors I ran into a Ruby VM hang. I see it both on Ruby 3.4.0-preview2 and 3.3.5, but not Ruby 3.2, so this may be related to the M:N scheduling. ### How to reproduce: ``` puts RUBY_DESCRIPTION def counter_loop counter = 0 counter += 1 while counter < 100_000_000 end ractors = 10.times.map { Ractor.new { Thread.new { counter_loop }; counter_loop } } counter_loop ractors.map(&:take) ``` This example never finishes for me. At some point all threads finish work, and the Ruby process will be stuck at 0% cpu. ``` ruby 3.4.0preview2 (2024-10-07 master 32c733f57b) +PRISM [x86_64-linux] warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues. ...(hangs)... ``` Reducing the number of ractor seems to make the issue go away, so there may be some timing/thread switching issues involved. Furthermore, all threads seem to be stuck waiting: ``` (gdb) info threads Id Target Id Frame * 1 Thread 0x7836ef0b6c00 (LWP 445418) "ruby" __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024bda30) at ./nptl/futex-internal.c:57 2 Thread 0x7836d4800640 (LWP 445419) "ruby" 0x00007836ee725e2e in epoll_wait (epfd=4, events=events@entry=0x7836ef0a8adc <timer_th+28>, maxevents=maxevents@entry=16, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30 3 Thread 0x7836d3fff640 (LWP 445420) "rc-example7-2.*" __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6434) at ./nptl/futex-internal.c:57 4 Thread 0x7836b29ff640 (LWP 445421) "rc-example7-2.*" __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6434) at ./nptl/futex-internal.c:57 5 Thread 0x7836b28fe640 (LWP 445422) "rc-example7-2.*" __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 6 Thread 0x7836b27fd640 (LWP 445423) "rc-example7-2.*" __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 7 Thread 0x7836b26fc640 (LWP 445424) "rc-example7-2.*" __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 8 Thread 0x7836b25fb640 (LWP 445425) "rc-example7-2.*" __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 9 Thread 0x7836b24fa640 (LWP 445426) "rc-example7-2.*" __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 (gdb) thread apply all bt Thread 9 (Thread 0x7836b24fa640 (LWP 445426) "rc-example7-2.*"): #0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x59a4024b6430, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007836ee693a41 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x59a4024b63d0, cond=0x59a4024b6408) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at ./nptl/pthread_cond_wait.c:627 #5 0x00007836eecd77dd in rb_native_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at src/ruby-3.4.0-preview2/thread_pthread.c:222 #6 0x00007836eece2e53 in ractor_sched_deq (cr=0x0, vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:1292 #7 nt_start (ptr=0x59a40251e800) at src/ruby-3.4.0-preview2/thread_pthread.c:2287 #8 0x00007836ee694ac3 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:442 #9 0x00007836ee726850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 Thread 8 (Thread 0x7836b25fb640 (LWP 445425) "rc-example7-2.*"): #0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x59a4024b6430, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007836ee693a41 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x59a4024b63d0, cond=0x59a4024b6408) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at ./nptl/pthread_cond_wait.c:627 #5 0x00007836eecd77dd in rb_native_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at src/ruby-3.4.0-preview2/thread_pthread.c:222 #6 0x00007836eece2e53 in ractor_sched_deq (cr=0x0, vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:1292 #7 nt_start (ptr=0x59a4025224e0) at src/ruby-3.4.0-preview2/thread_pthread.c:2287 #8 0x00007836ee694ac3 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:442 #9 0x00007836ee726850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 Thread 7 (Thread 0x7836b26fc640 (LWP 445424) "rc-example7-2.*"): #0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x59a4024b6430, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007836ee693a41 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x59a4024b63d0, cond=0x59a4024b6408) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at ./nptl/pthread_cond_wait.c:627 #5 0x00007836eecd77dd in rb_native_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at src/ruby-3.4.0-preview2/thread_pthread.c:222 #6 0x00007836eece2e53 in ractor_sched_deq (cr=0x0, vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:1292 #7 nt_start (ptr=0x59a4025adf00) at src/ruby-3.4.0-preview2/thread_pthread.c:2287 #8 0x00007836ee694ac3 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:442 #9 0x00007836ee726850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 Thread 6 (Thread 0x7836b27fd640 (LWP 445423) "rc-example7-2.*"): #0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x59a4024b6430, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007836ee693a41 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x59a4024b63d0, cond=0x59a4024b6408) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at ./nptl/pthread_cond_wait.c:627 #5 0x00007836eecd77dd in rb_native_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at src/ruby-3.4.0-preview2/thread_pthread.c:222 #6 0x00007836eece2e53 in ractor_sched_deq (cr=0x0, vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:1292 #7 nt_start (ptr=0x59a40263bc20) at src/ruby-3.4.0-preview2/thread_pthread.c:2287 #8 0x00007836ee694ac3 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:442 #9 0x00007836ee726850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 Thread 5 (Thread 0x7836b28fe640 (LWP 445422) "rc-example7-2.*"): #0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x59a4024b6430) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x59a4024b6430, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007836ee693a41 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x59a4024b63d0, cond=0x59a4024b6408) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at ./nptl/pthread_cond_wait.c:627 #5 0x00007836eecd77dd in rb_native_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at src/ruby-3.4.0-preview2/thread_pthread.c:222 #6 0x00007836eece2e53 in ractor_sched_deq (cr=0x0, vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:1292 #7 nt_start (ptr=0x59a40276bc80) at src/ruby-3.4.0-preview2/thread_pthread.c:2287 #8 0x00007836ee694ac3 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:442 #9 0x00007836ee726850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 Thread 4 (Thread 0x7836b29ff640 (LWP 445421) "rc-example7-2.*"): #0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6434) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x59a4024b6434) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x59a4024b6434, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007836ee693a41 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x59a4024b63d0, cond=0x59a4024b6408) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at ./nptl/pthread_cond_wait.c:627 #5 0x00007836eecd77dd in rb_native_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at src/ruby-3.4.0-preview2/thread_pthread.c:222 #6 0x00007836eece2e53 in ractor_sched_deq (cr=0x0, vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:1292 #7 nt_start (ptr=0x59a402729730) at src/ruby-3.4.0-preview2/thread_pthread.c:2287 #8 0x00007836ee694ac3 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:442 #9 0x00007836ee726850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 Thread 3 (Thread 0x7836d3fff640 (LWP 445420) "rc-example7-2.*"): #0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024b6434) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x59a4024b6434) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x59a4024b6434, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007836ee693a41 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x59a4024b63d0, cond=0x59a4024b6408) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at ./nptl/pthread_cond_wait.c:627 #5 0x00007836eecd77dd in rb_native_cond_wait (cond=cond@entry=0x59a4024b6408, mutex=mutex@entry=0x59a4024b63d0) at src/ruby-3.4.0-preview2/thread_pthread.c:222 #6 0x00007836eece2e53 in ractor_sched_deq (cr=0x0, vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:1292 #7 nt_start (ptr=0x59a4024bb430) at src/ruby-3.4.0-preview2/thread_pthread.c:2287 #8 0x00007836ee694ac3 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:442 #9 0x00007836ee726850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 Thread 2 (Thread 0x7836d4800640 (LWP 445419) "ruby"): #0 0x00007836ee725e2e in epoll_wait (epfd=4, events=events@entry=0x7836ef0a8adc <timer_th+28>, maxevents=maxevents@entry=16, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30 #1 0x00007836eecdca8d in event_wait (vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:2940 #2 timer_thread_polling (vm=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread_mn.c:908 #3 timer_thread_func (ptr=0x59a4024b6330) at src/ruby-3.4.0-preview2/thread_pthread.c:3067 #4 0x00007836ee694ac3 in start_thread (arg=<optimised out>) at ./nptl/pthread_create.c:442 #5 0x00007836ee726850 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 Thread 1 (Thread 0x7836ef0b6c00 (LWP 445418) "ruby"): #0 __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x59a4024bda30) at ./nptl/futex-internal.c:57 #1 __futex_abstimed_wait_common (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x59a4024bda30) at ./nptl/futex-internal.c:87 #2 __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x59a4024bda30, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ./nptl/futex-internal.c:139 #3 0x00007836ee693a41 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x59a4024bdb80, cond=0x59a4024bda08) at ./nptl/pthread_cond_wait.c:503 #4 ___pthread_cond_wait (cond=cond@entry=0x59a4024bda08, mutex=mutex@entry=0x59a4024bdb80) at ./nptl/pthread_cond_wait.c:627 #5 0x00007836eecd77dd in rb_native_cond_wait (cond=cond@entry=0x59a4024bda08, mutex=mutex@entry=0x59a4024bdb80) at src/ruby-3.4.0-preview2/thread_pthread.c:222 #6 0x00007836eecd90d9 in thread_sched_wait_running_turn (sched=sched@entry=0x59a4024bdb80, th=0x59a4024b88c0, can_direct_transfer=can_direct_transfer@entry=false) at src/ruby-3.4.0-preview2/thread_pthread.c:863 #7 0x00007836eecd9f4a in rb_ractor_sched_sleep (ec=ec@entry=0x59a4024bdd20, cr=cr@entry=0x59a4024bda60, ubf=ubf@entry=0x7836eec341f0 <ractor_sleep_interrupt>) at src/ruby-3.4.0-preview2/thread_pthread.c:1349 #8 0x00007836eec34de6 in ractor_sleep_with_cleanup (cf_data=0x7ffcaa1e7640, cf_func=0x7836eec35b70 <ractor_wait_take_cleanup>, wait_status=wait_taking, cr=0x59a4024bda60, ec=0x59a4024bdd20) at ractor.c:691 #9 ractor_wait_take (take_basket=0x7ffcaa1e7650, r=0x59a4027851d0, cr=0x59a4024bda60, ec=0x59a4024bdd20) at ractor.c:1220 #10 ractor_take (r=0x59a4027851d0, ec=0x59a4024bdd20) at ractor.c:1241 #11 builtin_inline_class_711 (ec=0x59a4024bdd20, self=<optimised out>) at src/ruby-3.4.0-preview2/ractor.rb:712 #12 0x00007836eed30fe7 in invoke_bf (argv=<optimised out>, bf=<optimised out>, reg_cfp=<optimised out>, ec=<optimised out>) at src/ruby-3.4.0-preview2/vm_insnhelper.c:7330 #13 vm_invoke_builtin_delegate (cfp=<optimised out>, bf=<optimised out>, cfp=<optimised out>, bf=<optimised out>, start_index=<optimised out>, ec=<optimised out>) at src/ruby-3.4.0-preview2/vm_insnhelper.c:7353 #14 vm_invoke_builtin_delegate (start_index=<optimised out>, bf=<optimised out>, cfp=<optimised out>, ec=<optimised out>) at src/ruby-3.4.0-preview2/vm_insnhelper.c:7342 #15 vm_exec_core (ec=0x59a4024bdd20) at src/ruby-3.4.0-preview2/insns.def:1632 #16 0x00007836eed34c1a in rb_vm_exec (ec=0x59a4024bdd20) at vm.c:2564 #17 0x00007836eed3b222 in vm_call0_cc (ec=0x59a4024bdd20, recv=132176890167200, id=<optimised out>, argc=<optimised out>, argv=<optimised out>, cc=<optimised out>, kw_splat=0) at src/ruby-3.4.0-preview2/vm_eval.c:101 #18 0x00007836eed3d9e4 in rb_call0 (ec=0x59a4024bdd20, recv=132176890167200, mid=6081, argc=0, argv=<optimised out>, call_scope=<optimised out>, self=132177315121880) at src/ruby-3.4.0-preview2/vm_eval.c:554 #19 0x00007836eed3e6f6 in rb_call (scope=<optimised out>, argv=0x7ffcaa1e7b40, argc=0, mid=6081, recv=132176890167200) at src/ruby-3.4.0-preview2/vm_eval.c:873 #20 rb_funcall_with_block_kw (recv=132176890167200, mid=6081, argc=0, argv=0x7ffcaa1e7b40, passed_procval=4, kw_splat=<optimised out>) at src/ruby-3.4.0-preview2/vm_eval.c:1192 #21 0x00007836eed39e38 in vm_yield_with_cref (is_lambda=0, cref=0x0, kw_splat=0, argv=0x7ffcaa1e7b38, argc=1, ec=<optimised out>) at vm.c:1646 #22 vm_yield (kw_splat=0, argv=0x7ffcaa1e7b38, argc=1, ec=<optimised out>) at vm.c:1654 #23 rb_yield_0 (argv=0x7ffcaa1e7b38, argc=1) at src/ruby-3.4.0-preview2/vm_eval.c:1344 #24 rb_yield (val=<optimised out>) at src/ruby-3.4.0-preview2/vm_eval.c:1360 #25 0x00007836eea68efc in rb_ary_collect (ary=132177315121880) at array.c:3714 #26 0x00007836eed1b03c in vm_call_cfunc_with_frame_ (stack_bottom=<optimised out>, argv=<optimised out>, argc=0, calling=<optimised out>, reg_cfp=0x7836edffefa0, ec=0x59a4024bdd20) at src/ruby-3.4.0-preview2/vm_insnhelper.c:3788 #27 vm_call_cfunc_with_frame (ec=0x59a4024bdd20, reg_cfp=0x7836edffefa0, calling=<optimised out>) at src/ruby-3.4.0-preview2/vm_insnhelper.c:3834 #28 0x00007836eed217f0 in vm_sendish (ec=0x59a4024bdd20, reg_cfp=0x7836edffefa0, cd=0x59a4027833f0, block_handler=<optimised out>, method_explorer=mexp_search_method) at src/ruby-3.4.0-preview2/vm_callinfo.h:415 #29 0x00007836eed2edd1 in vm_exec_core (ec=0x59a4024bdd20) at src/ruby-3.4.0-preview2/insns.def:851 #30 0x00007836eed34c1a in rb_vm_exec (ec=0x59a4024bdd20) at vm.c:2564 #31 0x00007836eed46e8b in rb_iseq_eval_main (iseq=iseq@entry=0x7836edea70f8) at vm.c:2830 #32 0x00007836eeb3d895 in rb_ec_exec_node (ec=ec@entry=0x59a4024bdd20, n=n@entry=0x7836edea70f8) at eval.c:281 #33 0x00007836eeb4140b in ruby_run_node (n=0x7836edea70f8) at eval.c:319 #34 0x000059a400cd1187 in rb_main (argv=0x7ffcaa1e8118, argc=2) at ./main.c:43 #35 main (argc=<optimised out>, argv=<optimised out>) at ./main.c:62 ``` -- https://bugs.ruby-lang.org/

4 4