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Bug #21772

open

ruby: YJIT has panicked StackOpnd(1) should be a heap object, but was ImmSymbol for VALUE(137647867319760)

Bug #21772: ruby: YJIT has panicked StackOpnd(1) should be a heap object, but was ImmSymbol for VALUE(137647867319760)

Added by gearoiddc (Gearoid de Cleir) about 24 hours ago. Updated about 4 hours ago.

Status:
Open
Assignee:
jit
Target version:
-
ruby -v:
3.4.7
Backport:
3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
[ruby-core:124121]

Description

I'm getting a YJIT has panicked crash in my rails app locally when a part of my application rapidly uses a gem I have "auto_session_timeout".

If I patch the gem by changing the symbol to a string the error goes away.

  module AutoSessionTimeout
    private

    def session_expired?(c)
      c.session[:auto_session_expires_at].<(Time.now)
    end
  end

to

  def session_expired?(c)
    c.session["auto_session_expires_at"].<(Time.now)
  end

I can consistently cause the crash but I can't find a way to reproduce the error in a snipped of code.

But it looks like YJIT is keeping the key as a sybmol even though it was converted to a string.

def [](key)
  load_for_read!
  key = key.to_s

  if key == "session_id" # <-- crash occurs here
    id&.public_id
  else
    @delegate[key]
  end
end

Didn't have the same issue on ruby 3.3 with YJIT.

System Configuration
Ruby Version: ruby 3.4.7 (2025-10-08 revision 7a5688e2a2) +YJIT +PRISM [x86_64-linux]

Environment: Ubuntu 22.04.5 LTS (x86_64)

Backtrace & Logs

ruby: YJIT has panicked. More info to follow...

thread '<unnamed>' panicked at ./yjit/src/codegen.rs:5018:9:
StackOpnd(1) should be a heap object, but was ImmSymbol for VALUE(137647867319760)
stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
   1: core::panicking::panic_fmt
             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
   2: yjit::codegen::jit_guard_known_klass
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/codegen.rs:5018:9
   3: yjit::codegen::gen_equality_specialized
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/codegen.rs:3690:9
   4: yjit::codegen::gen_opt_eq
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/codegen.rs:3753:29
   5: yjit::codegen::gen_single_block
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/codegen.rs:1382:22
   6: yjit::core::gen_block_series_body
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/core.rs:3088:23
   7: yjit::core::gen_block_series
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/core.rs:3066:18
   8: yjit::core::branch_stub_hit_body
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/core.rs:3604:17
   9: yjit::core::branch_stub_hit::{{closure}}::{{closure}}
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/core.rs:3493:36
  10: yjit::stats::with_compile_time
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/stats.rs:1084:15
  11: yjit::core::branch_stub_hit::{{closure}}
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/core.rs:3493:13
  12: std::panicking::catch_unwind::do_call
             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
  13: std::panicking::catch_unwind
             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
  14: std::panic::catch_unwind
             at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
  15: yjit::cruby::with_vm_lock
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/cruby.rs:688:21
  16: yjit::core::branch_stub_hit
             at /home/travis/.rvm/src/ruby-3.4.7/yjit/src/core.rs:3492:9
  17: <unknown>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/request/session.rb:118: [BUG] YJIT: panicked at ./yjit/src/codegen.rs:5018:9:
StackOpnd(1) should be a heap object, but was ImmSymbol for VALUE(137647867319760)
ruby 3.4.7 (2025-10-08 revision 7a5688e2a2) +YJIT +PRISM [x86_64-linux]

Files

session_blocks.log (356 KB) session_blocks.log gearoiddc (Gearoid de Cleir), 12/11/2025 03:29 PM

Updated by gearoiddc (Gearoid de Cleir) about 24 hours ago Actions
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 #1

  • Description updated (diff)

Updated by k0kubun (Takashi Kokubun) about 23 hours ago Actions
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 #2 [ruby-core:124123]

  • Assignee set to jit

Backtrace & Logs

Is it possible to share the Ruby backtrace as well?

Updated by gearoiddc (Gearoid de Cleir) about 23 hours ago Actions
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 #3 [ruby-core:124124]

Sure no problem anything else?

-- Ruby level backtrace information ----------------------------------------
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/puma-7.1.0/lib/puma/thread_pool.rb:182:in 'block in spawn_thread'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/puma-7.1.0/lib/puma/server.rb:262:in 'block in run'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/puma-7.1.0/lib/puma/server.rb:503:in 'process_client'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/puma-7.1.0/lib/puma/request.rb:100:in 'handle_request'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/puma-7.1.0/lib/puma/thread_pool.rb:355:in 'with_force_shutdown'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/puma-7.1.0/lib/puma/request.rb:101:in 'block in handle_request'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/puma-7.1.0/lib/puma/configuration.rb:300:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/railties-7.2.3/lib/rails/engine.rb:535:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-mini-profiler-3.0.0/lib/mini_profiler/profiler.rb:393:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/host_authorization.rb:143:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/sendfile.rb:127:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/static.rb:27:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/executor.rb:16:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/server_timing.rb:60:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/server_timing.rb:26:in 'collect_events'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/server_timing.rb:61:in 'block in call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/cache/strategy/local_cache_middleware.rb:29:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/runtime.rb:22:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/method_override.rb:24:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/request_id.rb:33:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/request_store-1.5.1/lib/request_store/middleware.rb:19:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/remote_ip.rb:96:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/sprockets-rails-3.5.1/lib/sprockets/rails/quiet_assets.rb:17:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/railties-7.2.3/lib/rails/rack/logger.rb:29:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/railties-7.2.3/lib/rails/rack/logger.rb:41:in 'call_app'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/show_exceptions.rb:32:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/debug_exceptions.rb:31:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/airbrake-13.0.5/lib/airbrake/rack/middleware.rb:23:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/airbrake-13.0.5/lib/airbrake/rack/middleware.rb:34:in 'call!'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/better_errors-2.9.1/lib/better_errors/middleware.rb:60:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/better_errors-2.9.1/lib/better_errors/middleware.rb:82:in 'better_errors_call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/better_errors-2.9.1/lib/better_errors/middleware.rb:87:in 'protected_app_call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/actionable_exceptions.rb:18:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/executor.rb:16:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/callbacks.rb:30:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/callbacks.rb:101:in 'run_callbacks'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/callbacks.rb:31:in 'block in call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activerecord-7.2.3/lib/active_record/migration.rb:674:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/middleware/cookies.rb:704:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/session/abstract/id.rb:260:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/session/abstract/id.rb:266:in 'context'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/http/content_security_policy.rb:38:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/http/permissions_policy.rb:38:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/head.rb:12:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/conditional_get.rb:27:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/etag.rb:27:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-2.2.21/lib/rack/tempfile_reaper.rb:15:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/warden-1.2.9/lib/warden/manager.rb:34:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/warden-1.2.9/lib/warden/manager.rb:34:in 'catch'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/warden-1.2.9/lib/warden/manager.rb:36:in 'block in call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/remotipart-1.4.4/lib/remotipart/middleware.rb:32:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/rack-attack-6.6.1/lib/rack/attack.rb:127:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/bullet-8.0.8/lib/bullet/rack.rb:21:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/scout_apm-5.7.0/lib/scout_apm/middleware.rb:17:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/scout_apm-5.7.0/lib/scout_apm/instant/middleware.rb:55:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/omniauth-1.9.2/lib/omniauth/strategy.rb:169:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/omniauth-1.9.2/lib/omniauth/strategy.rb:192:in 'call!'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/routing/route_set.rb:896:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/journey/router.rb:34:in 'serve'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/journey/router.rb:126:in 'find_routes'
<internal:array>:228:in 'each'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/journey/router.rb:133:in 'block in find_routes'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/journey/router.rb:53:in 'block in serve'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/routing/route_set.rb:50:in 'serve'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/routing/route_set.rb:67:in 'dispatch'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_controller/metal.rb:335:in 'dispatch'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_controller/metal.rb:252:in 'dispatch'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionview-7.2.3/lib/action_view/rendering.rb:40:in 'process'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/abstract_controller/base.rb:152:in 'process'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activerecord-7.2.3/lib/active_record/railties/controller_runtime.rb:39:in 'process_action'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_controller/metal/params_wrapper.rb:259:in 'process_action'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_controller/metal/instrumentation.rb:76:in 'process_action'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/notifications.rb:210:in 'instrument'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/notifications/instrumenter.rb:58:in 'instrument'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/notifications.rb:210:in 'block in instrument'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_controller/metal/instrumentation.rb:77:in 'block in process_action'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_controller/metal/rescue.rb:27:in 'process_action'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/abstract_controller/callbacks.rb:260:in 'process_action'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/callbacks.rb:109:in 'run_callbacks'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/callbacks.rb:560:in 'invoke_before'
<internal:array>:228:in 'each'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/callbacks.rb:560:in 'block in invoke_before'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/callbacks.rb:180:in 'call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/abstract_controller/callbacks.rb:34:in 'block (2 levels) in <module:Callbacks>'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/callbacks.rb:179:in 'block in call'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/callbacks.rb:429:in 'block in make_lambda'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/activesupport-7.2.3/lib/active_support/callbacks.rb:429:in 'instance_exec'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/auto-session-timeout-1.3/lib/auto_session_timeout.rb:10:in 'block in auto_session_timeout'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/auto-session-timeout-1.3/lib/auto_session_timeout.rb:48:in 'session_expired?'
/home/gearoid/.rvm/gems/ruby-3.4.7@7.2.3/gems/actionpack-7.2.3/lib/action_dispatch/request/session.rb:118:in '[]'

Updated by alanwu (Alan Wu) about 5 hours ago Actions
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 #4 [ruby-core:124144]

It looks like you've hit the same panic as #21565.

Could you try the instructions from https://bugs.ruby-lang.org/issues/21565#note-5 to gather more information? Since you're on 3.4.7, you don't need to patch ruby for the steps there.

Updated by gearoiddc (Gearoid de Cleir) about 4 hours ago 1Actions
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 #5 [ruby-core:124145]

I've attached a file the original log file was 90mb so I used

grep -B 2 -A 100 "action_dispatch/request/session.rb" /tmp/yjit_58847.log > /tmp/session_blocks.log

Hopefully that is what you are looking for.

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