ZJIT: Run yjit-bench

[tekknolagi]

[k0kubun]

Now that we fixed #644 and #645, I think we're done. I already tested all benchmarks with 2 itrs and blurhash seemed like the only failure when I was working on it.

I'll run a whole benchmark suite with full iterations on both x86_64-linux and arm64-darwin now to confirm that.

[tekknolagi]

!! Let's get some preliminary numbers then so we can all be very disappointed and know what's ahead of us :D

[k0kubun]

This time I was running only ZJIT because it takes a while.

Anyway, it ran successfully on all benchmarks. So I'll close the issue. For numbers, I'll separately run headline benchmarks with different implementations.

arm64

ruby-release: ruby 3.5.0dev (2025-07-17T19:22:26Z master 04d43e1870) +ZJIT +PRISM [arm64-darwin24]

-----------------  -----------------  ----------
bench              ruby-release (ms)  stddev (%)
activerecord       161.7              0.7
chunky-png         413.0              0.3
erubi-rails        662.0              0.3
hexapdf            1242.8             2.3
liquid-c           30.3               5.5
liquid-compile     25.9               1.8
liquid-render      72.0               1.9
lobsters           593.1              1.0
mail               72.9               5.8
psych-load         1204.8             0.3
railsbench         1182.0             1.2
rubocop            90.5               1.7
ruby-lsp           88.8               0.7
sequel             28.5               1.6
shipit             1037.4             1.6
binarytrees        159.8              2.0
blurhash           188.8              0.2
erubi              102.5              1.0
etanni             147.1              0.6
fannkuchredux      298.2              0.3
fluentd            213.3              4.6
graphql            162.6              0.8
graphql-native     258.5              0.5
lee                542.1              0.2
matmul             409.8              0.2
nbody              59.9               2.9
nqueens            127.3              0.5
optcarrot          4467.8             1.1
protoboeuf         92.9               1.1
protoboeuf-encode  67.5               0.3
rack               18.8               1.4
ruby-json          147.8              0.4
rubyboy            2663.6             0.2
rubykon            575.0              1.3
sudoku             341.6              0.3
tinygql            343.1              0.1
30k_ifelse         92.9               4.4
30k_methods        30.9               7.5
attr_accessor      65.7               0.5
cfunc_itself       10.2               4.5
fib                112.2              0.2
getivar            28.7               1.0
keyword_args       89.7               1.0
loops-times        488.7              0.2
object-new         41.0               0.8
respond_to         104.3              3.3
ruby-xor           65.3               0.7
setivar            52.6               1.6
setivar_object     60.1               0.6
setivar_young      58.1               1.3
str_concat         48.8               2.0
throw              12.0               1.5
-----------------  -----------------  ----------

x86_64

ruby-release: ruby 3.5.0dev (2025-07-17T19:22:26Z master 04d43e1870) +ZJIT +PRISM [x86_64-linux]

-----------------  -----------------  ----------
bench              ruby-release (ms)  stddev (%)
activerecord       223.8              1.2
chunky-png         522.2              0.3
erubi-rails        923.4              0.6
hexapdf            1659.5             1.4
liquid-c           44.1               4.4
liquid-compile     37.0               1.9
liquid-render      101.3              1.4
lobsters           796.5              0.5
mail               98.3               5.6
psych-load         1520.6             0.3
railsbench         1977.9             0.9
rubocop            111.2              1.7
ruby-lsp           115.2              0.8
sequel             45.1               1.0
shipit             1456.5             1.5
binarytrees        202.8              2.6
blurhash           230.5              0.4
erubi              117.6              1.1
etanni             186.2              0.7
fannkuchredux      278.3              0.3
fluentd            283.1              1.3
graphql            202.7              0.5
graphql-native     335.7              1.1
lee                696.2              0.3
matmul             547.5              0.7
nbody              74.8               0.8
nqueens            137.2              0.5
optcarrot          5737.7             1.2
protoboeuf         110.9              0.7
protoboeuf-encode  86.8               2.4
rack               28.7               1.5
ruby-json          202.3              0.5
rubyboy            3286.0             0.4
rubykon            761.3              1.1
sudoku             316.4              0.8
tinygql            465.0              0.8
30k_ifelse         133.2              0.5
30k_methods        51.3               0.8
attr_accessor      77.3               0.6
cfunc_itself       11.0               1.9
fib                133.1              0.4
getivar            46.8               1.0
keyword_args       145.7              0.6
loops-times        671.1              0.2
object-new         58.4               1.7
respond_to         138.7              0.9
ruby-xor           86.3               0.8
setivar            73.4               0.9
setivar_object     79.7               1.4
setivar_young      79.2               0.6
str_concat         42.4               1.8
throw              16.0               2.0
-----------------  -----------------  ----------

[k0kubun]

I ran headline benchmarks with the interpreter, YJIT, and ZJIT, but the results looked wrong; YJIT didn't didn't give any speedup (while it does speed up microbenchmarks like fib).

I also tried --yjit-stats to see what's wrong, but it printed nothing. So something seems very off. I'm using Ruby built with --enable-yjit --enable-zjit for this. I'll need to look into it first before posting any number.

[k0kubun]

I minimized the repro condition for the bundler issue and finished reporting it ruby/rubygems#8892.

This problems seems specific to Ruby master, so I guess a workaround could be to use BUNDLED WITH 2.8.0.dev for every benchmark for now. Ruby 3.4 can use it correctly, and Ruby master doesn't re-exec itself with that Gemfile.lock. I'll file a PR to do it.

[k0kubun]

Filed ruby/ruby-bench#371.

I've learned from hsbt that bundle config version system allows you to ignore BUNDLED WITH, but I think yjit-bench should support benchmarking Ruby master without such a special configuration. So I think the PR is still nice to have.

[eregon]

but I think yjit-bench should support benchmarking Ruby master without such a special configuration

The .bundle/config could be checked in to automatically apply that, but it would need to be added for every benchmark.
It's also possible to enable that via just an env var: BUNDLE_VERSION=system, which maybe could be set by the common harness or maybe run_benchmarks.rb.

Ultimately I think ruby/rubygems#8892 is a pretty serious Bundler bug though, so the best would be to fix it there.

[k0kubun]

So, with Gemfile.lock fixed, the following benchmarks currently don't run properly with ZJIT:

• activerecord
• chunky-png
• erubi
• erubi-rails
• etanni
• fluentd
• graphql
• graphql-native
• hexapdf
• lee
• liquid-c
• liquid-compile
• liquid-render
• lobsters
• mail
• psych-load
• rack
• railsbench
• rubocop
• ruby-json
• ruby-lsp
• rubyboy
• sequel
• shipit
• tinygql

I'll have a look at them next week.

[k0kubun]

It's crashing inside require 'bundler/setup', so every benchmark using Gemfile would fail on it.

[k0kubun]

It looks like yet another GC problem:

$ /opt/rubies/ruby/bin/ruby --zjit benchmarks/fluentd/benchmark.rb
ruby 3.5.0dev (2025-08-04T00:29:53Z zjit-routine-call 1c6b36af18) +ZJIT dev_nodebug +PRISM [x86_64-linux]
Command: bundle check 2> /dev/null || bundle install
The Gemfile's dependencies are satisfied
<internal:io>:134: [BUG] Segmentation fault at 0x0000000000000000
ruby 3.5.0dev (2025-08-04T00:29:53Z zjit-routine-call 1c6b36af18) +ZJIT dev_nodebug +PRISM [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0050 p:0010 s:0273 e:000272 METHOD <internal:io>:134 [FINISH]
c:0049 p:0023 s:0265 e:000264 BLOCK  /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/stub_specification.rb:113 [FINISH]
c:0048 p:---- s:0258 e:000257 CFUNC  :open
c:0047 p:0012 s:0252 e:000251 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems.rb:866
c:0046 p:0019 s:0245 e:000244 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/stub_specification.rb:109
c:0045 p:0004 s:0240 e:000239 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/rubygems_ext.rb:327 [FINISH]
c:0044 p:0003 s:0236 e:000235 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/stub_specification.rb:196 [FINISH]
c:0043 p:---- s:0232 e:000231 CFUNC  :select
c:0042 p:0016 s:0228 e:000227 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification.rb:785
c:0041 p:0027 s:0222 e:000221 BLOCK  /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:208 [FINISH]
c:0040 p:---- s:0216 e:000215 IFUNC
c:0039 p:---- s:0213 e:000212 CFUNC  :each
c:0038 p:---- s:0210 e:000209 CFUNC  :flat_map
c:0037 p:0006 s:0206 e:000205 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:205
c:0036 p:0006 s:0201 e:000200 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:199
c:0035 p:0009 s:0196 e:000195 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:68
c:0034 p:0018 s:0188 e:000187 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:42
c:0033 p:0005 s:0182 e:000181 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification.rb:799
c:0032 p:0004 s:0178 e:000177 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/rubygems_integration.rb:427
c:0031 p:0006 s:0174 e:000173 BLOCK  /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/source/rubygems.rb:373
c:0030 p:0020 s:0170 e:000169 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/index.rb:9
c:0029 p:0012 s:0165 e:000164 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/source/rubygems.rb:372
c:0028 p:0059 s:0161 e:000159 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/source/rubygems.rb:149
c:0027 p:0005 s:0155 e:000154 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/lazy_specification.rb:200
c:0026 p:0016 s:0149 e:000148 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/lazy_specification.rb:141
c:0025 p:0003 s:0145 e:000144 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/lazy_specification.rb:132 [FINISH]
c:0024 p:---- s:0141 e:000140 IFUNC
c:0023 p:---- s:0138 e:000137 CFUNC  :each
c:0022 p:---- s:0135 e:000134 CFUNC  :filter_map
c:0021 p:0020 s:0131 e:000130 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/match_platform.rb:20
c:0020 p:0061 s:0122 e:000121 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/materialization.rb:27
c:0019 p:0003 s:0118 e:000117 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/materialization.rb:18
c:0018 p:0093 s:0114 e:000113 BLOCK  /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/spec_set.rb:269
c:0017 p:0017 s:0105 e:000104 METHOD <internal:kernel>:168
c:0016 p:0043 s:0100 e:000099 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/spec_set.rb:255
c:0015 p:0005 s:0090 e:000089 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/spec_set.rb:131
c:0014 p:0007 s:0085 e:000084 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/definition.rb:649
c:0013 p:0013 s:0072 e:000071 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/definition.rb:237
c:0012 p:0009 s:0068 e:000067 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/definition.rb:304
c:0011 p:0017 s:0062 e:000061 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/runtime.rb:18
c:0010 p:0037 s:0055 e:000054 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler.rb:166
c:0009 p:0004 s:0050 e:000049 BLOCK  /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/setup.rb:16
c:0008 p:0012 s:0047 e:000046 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/ui/shell.rb:173
c:0007 p:0009 s:0041 e:000040 METHOD /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/ui/shell.rb:119
c:0006 p:0049 s:0036 e:000035 TOP    /opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/setup.rb:16 [FINISH]
c:0005 p:---- s:0027 e:000026 CFUNC  :require
c:0004 p:0023 s:0022 e:000021 METHOD <internal:/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/core_ext/kernel_require.rb>:139
c:0003 p:0017 s:0016 e:000015 METHOD /home/k0kubun/src/github.com/Shopify/yjit-bench/harness/harness-common.rb:47
c:0002 p:0017 s:0010 E:001830 EVAL   benchmarks/fluentd/benchmark.rb:6 [FINISH]
c:0001 p:0000 s:0003 E:001570 DUMMY  [FINISH]

-- Ruby level backtrace information ----------------------------------------
benchmarks/fluentd/benchmark.rb:6:in '<main>'
/home/k0kubun/src/github.com/Shopify/yjit-bench/harness/harness-common.rb:47:in 'use_gemfile'
<internal:/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/core_ext/kernel_require.rb>:139:in 'require'
<internal:/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/core_ext/kernel_require.rb>:139:in 'require'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/setup.rb:16:in '<top (required)>'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/ui/shell.rb:119:in 'silence'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/ui/shell.rb:173:in 'with_level'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/setup.rb:16:in 'block in <top (required)>'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler.rb:166:in 'setup'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/runtime.rb:18:in 'setup'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/definition.rb:304:in 'specs_for'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/definition.rb:237:in 'specs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/definition.rb:649:in 'materialize'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/spec_set.rb:131:in 'materialize'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/spec_set.rb:255:in 'materialize_dependencies'
<internal:kernel>:168:in 'loop'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/spec_set.rb:269:in 'block in materialize_dependencies'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/materialization.rb:18:in 'complete?'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/materialization.rb:27:in 'specs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/match_platform.rb:20:in 'select_best_local_platform_match'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/match_platform.rb:20:in 'filter_map'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/match_platform.rb:20:in 'each'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/lazy_specification.rb:132:in 'materialized_for_installation'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/lazy_specification.rb:141:in 'materialize_for_installation'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/lazy_specification.rb:200:in 'materialize'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/source/rubygems.rb:149:in 'specs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/source/rubygems.rb:372:in 'installed_specs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/index.rb:9:in 'build'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/source/rubygems.rb:373:in 'block in installed_specs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/rubygems_integration.rb:427:in 'installed_specs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification.rb:799:in 'stubs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:42:in 'stubs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:68:in 'stubs_for_pattern'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:199:in 'installed_stubs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:205:in 'map_stubs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:205:in 'flat_map'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:205:in 'each'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification_record.rb:208:in 'block in map_stubs'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification.rb:785:in 'gemspec_stubs_in'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/specification.rb:785:in 'select'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/stub_specification.rb:196:in 'valid?'
/opt/rubies/ruby/lib/ruby/3.5.0+2/bundler/rubygems_ext.rb:327:in 'data'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/stub_specification.rb:109:in 'data'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems.rb:866:in 'open_file'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems.rb:866:in 'open'
/opt/rubies/ruby/lib/ruby/3.5.0+2/rubygems/stub_specification.rb:113:in 'block in data'
<internal:io>:134:in 'readline'

-- Threading information ---------------------------------------------------
Total ractor count: 1
Ruby thread count for this ractor: 1

-- Machine register context ------------------------------------------------
 RIP: 0x00005f580f8ac74d RBP: 0x00005f58140f2ca0 RSP: 0x00007ffc861a40f0
 RAX: 0x0000000000000000 RBX: 0x00007b1ade000000 RCX: 0x0000000000000000
 RDX: 0x0000000000000000 RDI: 0x0000000000000000 RSI: 0x00007b1addcefe00
  R8: 0x0000e9c500000001  R9: 0x00005f5814959c10 R10: 0x000000000000001a
 R11: 0x0000000000000001 R12: 0x00005f58140f0300 R13: 0x0000000000000000
 R14: 0x0000000000000000 R15: 0x0000000000000000 EFL: 0x0000000000010206

-- C level backtrace information -------------------------------------------
/opt/rubies/ruby/bin/ruby(rb_print_backtrace+0x8) [0x5f58100d2632] ../vm_dump.c:843
/opt/rubies/ruby/bin/ruby(rb_vm_bugreport) ../vm_dump.c:1175
/opt/rubies/ruby/bin/ruby(rb_bug_for_fatal_signal+0x102) [0x5f5810089262] ../error.c:1130
/opt/rubies/ruby/bin/ruby(sigsegv+0x46) [0x5f580f9c99b6] ../signal.c:946
/lib/x86_64-linux-gnu/libc.so.6(0x7b1ade445330) [0x7b1ade445330]
/opt/rubies/ruby/bin/ruby(RVALUE_WB_UNPROTECTED+0x0) [0x5f580f8ac74d] ../gc/default/default.c:4299
/opt/rubies/ruby/bin/ruby(rgengc_check_relation) ../gc/default/default.c:4300
/opt/rubies/ruby/bin/ruby(gc_mark) ../gc/default/default.c:4369
/opt/rubies/ruby/bin/ruby(rb_gc_impl_mark) ../gc/default/default.c:4435
/opt/rubies/ruby/bin/ruby(gc_mark_internal) ../gc.c:2605
/opt/rubies/ruby/bin/ruby(rb_zjit_iseq_mark+0x1da) [0x5f580fb00b3a] zjit/src/gc.rs:88
/opt/rubies/ruby/bin/ruby(rb_iseq_mark_and_move+0x618) [0x5f580f901898] ../iseq.c:413
/opt/rubies/ruby/bin/ruby(gc_mark_children+0x1c) [0x5f580f8b65f2] ../gc/default/default.c:4563
/opt/rubies/ruby/bin/ruby(gc_marks_wb_unprotected_objects_plane) ../gc/default/default.c:5249
/opt/rubies/ruby/bin/ruby(rgengc_rememberset_mark_plane) ../gc/default/default.c:5241
/opt/rubies/ruby/bin/ruby(rgengc_rememberset_mark) ../gc/default/default.c:5907
/opt/rubies/ruby/bin/ruby(gc_marks_start) ../gc/default/default.c:5731
/opt/rubies/ruby/bin/ruby(gc_marks) ../gc/default/default.c:5751
/opt/rubies/ruby/bin/ruby(gc_start) ../gc/default/default.c:6425
/opt/rubies/ruby/bin/ruby(heap_prepare+0x46) [0x5f580f8b7536] ../gc/default/default.c:2050
/opt/rubies/ruby/bin/ruby(heap_next_free_page) ../gc/default/default.c:2274
/opt/rubies/ruby/bin/ruby(newobj_cache_miss) ../gc/default/default.c:2381
/opt/rubies/ruby/bin/ruby(newobj_alloc+0xd) [0x5f580f8b8fdd] ../gc/default/default.c:2405
/opt/rubies/ruby/bin/ruby(rb_gc_impl_new_obj) ../gc/default/default.c:2484
/opt/rubies/ruby/bin/ruby(newobj_of) ../gc.c:991
/opt/rubies/ruby/bin/ruby(rb_wb_protected_newobj_of) ../gc.c:1029
/opt/rubies/ruby/bin/ruby(str_alloc_embed+0x1c) [0x5f580f9db41c] ../string.c:1006
/opt/rubies/ruby/bin/ruby(str_enc_new) ../string.c:1049
/opt/rubies/ruby/bin/ruby(rb_io_getline_fast+0x27) [0x5f580f8e2c3c] ../io.c:4039
/opt/rubies/ruby/bin/ruby(rb_io_getline_0) ../io.c:4175
/opt/rubies/ruby/bin/ruby(rb_io_getline_1+0xc) [0x5f580f8e38bf] ../io.c:4280
/opt/rubies/ruby/bin/ruby(io_readline) ../io.c:4467
/opt/rubies/ruby/bin/ruby(invoke_bf+0x13) [0x5f580fa7b0d4] ../vm_insnhelper.c:7488
/opt/rubies/ruby/bin/ruby(vm_invoke_builtin_delegate) ../vm_insnhelper.c:7516
/opt/rubies/ruby/bin/ruby(vm_exec_core) ../insns.def:1698
/opt/rubies/ruby/bin/ruby(rb_vm_exec+0x213) [0x5f580fa6b933] ../vm.c:2621
[0x5f580b2bdee5]

[k0kubun]

In this instance:

/opt/rubies/ruby-debug/lib/ruby/3.5.0+2/rubygems/vendor/uri/lib/uri/common.rb:310: [BUG] Segmentation fault at 0x00007a86bb000000

Code address 0x56dd23077499 originally had 0x7a86bb94e580, but then the half of the bits seem to be wiped out and it became 0x7a86bb000000. Something is updating the code at the GC offset.