Bug #17634: Ractor code gives me malloc(): unaligned fastbin chunk detected - Ruby master - Ruby Issue Tracking System

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Bug #17634

closed

Ractor code gives me malloc(): unaligned fastbin chunk detected

Added by fidalgo (Paulo Fidalgo) about 3 years ago. Updated about 3 years ago.

Status:

Closed

Assignee:

ko1 (Koichi Sasada)

Target version:

ruby -v:

ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]

Backport:

2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: DONE

[ruby-core:102541]

Description

I'm running this code against ruby 3.0.0

# frozen_string_literal: true

def number_combinations
  @number_combinations ||= (1..50).to_a.combination(5)
end

def max_sequence_numbers_reached?(elements)
  elements.slice_when { |i, j| i + 1 == j }.count <= 2
end

puts "Combinations size:#{number_combinations.size}"
splits = number_combinations.each_slice(number_combinations.size / 8)
ractors = []
splits.each do |split|
  ractor = Ractor.new do
    combination = Ractor.receive
    puts "Received combination size:#{combination.size}"
    combination.map { |c| c unless max_sequence_numbers_reached?(c) }.compact
  end
  ractor.send(split)
  ractors << ractor
end
result = ractors.map(&:take)
puts result.flatten.size

I'm taking one big array, split it into 8 other arrays and then use one actor for each subset to check if there is more than 2 sequence numbers.
Since I'm not sharing state between actors nor doing something fancy, I would expect this to run 100% of the times.
I have different errors when running

ruby ractor.rb 
Combinations size:2118760
<internal:ractor>:267: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues.
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
malloc(): unaligned fastbin chunk detected
Aborted (core dumped)

ruby ractor.rb 
Combinations size:2118760
<internal:ractor>:267: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues.
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
<OBJ_INFO:gc_mark_ptr@gc.c:6106> 0x0000000007666050 [0 M   ] T_NONE 
ractor.rb:8: [BUG] try to mark T_NONE object
ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0011 p:---- s:0039 e:000038 IFUNC 
c:0010 p:---- s:0036 e:000035 CFUNC  :each
c:0009 p:---- s:0033 e:000032 IFUNC 
c:0008 p:---- s:0030 E:0014e0 CFUNC  :each
c:0007 p:---- s:0027 e:000026 CFUNC  :each
c:0006 p:---- s:0024 E:001480 CFUNC  :count
c:0005 p:0008 s:0020 E:0012d8 METHOD ractor.rb:8
c:0004 p:0006 s:0015 e:000014 BLOCK  ractor.rb:18 [FINISH]
c:0003 p:---- s:0011 e:000010 CFUNC  :map
c:0002 p:0040 s:0007 e:000006 BLOCK  ractor.rb:18 [FINISH]
c:0001 p:---- s:0003 e:000002 (none) [FINISH]

-- Ruby level backtrace information ----------------------------------------
ractor.rb:18:in `block (2 levels) in <main>'
ractor.rb:18:in `map'
ractor.rb:18:in `block (3 levels) in <main>'
ractor.rb:8:in `max_sequence_numbers_reached?'
ractor.rb:8:in `count'
ractor.rb:8:in `each'
ractor.rb:8:in `each'
ractor.rb:8:in `each'

-- C level backtrace information -------------------------------------------
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_print_backtrace+0x11) [0x7faa0e3fa6fb] vm_dump.c:758
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_bugreport) vm_dump.c:998
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(bug_report_end+0x0) [0x7faa0e207dfa] error.c:763
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_bug_without_die) error.c:763
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(die+0x0) [0x7faa0e171e01] error.c:771
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_bug) error.c:773
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(gc_mark_ptr+0xd8) [0x7faa0e22d768] gc.c:6107
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(generator_mark+0xc) [0x7faa0e1fcdec] enumerator.c:1387
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(is_mark_stack_empty+0x0) [0x7faa0e2304cc] gc.c:6454
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(pop_mark_stack) gc.c:5458
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(gc_mark_stacked_objects) gc.c:6448
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(gc_mark_stacked_objects_all) gc.c:6494
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(gc_marks_rest) gc.c:7435
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(gc_marks+0x8) [0x7faa0e230e08] gc.c:7491
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(gc_start) gc.c:8309
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_multi_ractor_p+0x0) [0x7faa0e23299f] gc.c:8197
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_lock_leave) vm_sync.h:93
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(garbage_collect) gc.c:8199
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(garbage_collect_with_gvl) gc.c:8502
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(objspace_malloc_increase) gc.c:10448
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(objspace_malloc_increase) gc.c:10426
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(objspace_malloc_fixup+0x17) [0x7faa0e2351c4] gc.c:10527
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(ruby_xmalloc2) gc.c:10598
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(ary_heap_alloc+0x14) [0x7faa0e178504] array.c:329
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(ary_heap_alloc) array.c:320
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(ary_resize_capa) array.c:448
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(ary_double_capa+0x44) [0x7faa0e17cd88] array.c:502
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(ary_ensure_room_for_push) array.c:653
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_array_ptr_use_start+0x0) [0x7faa0e17cf0d] array.c:1304
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_ary_push) array.c:1305
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(slicewhen_ii+0x132) [0x7faa0e1f8902] enum.c:3693
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_pop_frame+0x0) [0x7faa0e3daab8] vm_insnhelper.c:3704
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_yield_with_cfunc) vm_insnhelper.c:3705
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(invoke_block_from_c_bh+0x10) [0x7faa0e3f21f3] vm.c:1358
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_yield) vm.c:1398
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_yield_0) vm_eval.c:1171
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_yield_1) vm_eval.c:1177
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_yield) vm_eval.c:1187
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(RB_FL_TEST_RAW+0x0) [0x7faa0e17695c] array.c:2523
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(RB_FL_ANY_RAW) ./include/ruby/internal/fl_type.h:258
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_array_len) ./include/ruby/internal/core/rarray.h:135
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_ary_each) array.c:2522
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_cfp_consistent_p+0x0) [0x7faa0e3e79e6] vm_eval.c:95
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_cfunc_with_frame) vm_eval.c:97
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_cfunc) vm_eval.c:109
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_body) vm_eval.c:144
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_call0) vm_eval.c:57
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_call0+0x6a) [0x7faa0e3efc7e] vm_eval.c:361
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_call) vm_eval.c:689
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(iterate_method) vm_eval.c:1406
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_iterate0+0xf8) [0x7faa0e3d74b8] vm_eval.c:1355
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_block_call+0x53) [0x7faa0e3d76e3] vm_eval.c:1420
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_obj_wb_unprotect+0x0) [0x7faa0e1f6100] enum.c:3718
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(RARRAY_PTR) ./include/ruby/internal/core/rarray.h:248
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(slicewhen_i) enum.c:3719
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_pop_frame+0x0) [0x7faa0e3daab8] vm_insnhelper.c:3704
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_yield_with_cfunc) vm_insnhelper.c:3705
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_invoke_proc+0x2a0) [0x7faa0e3e65d0] vm.c:1448
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_invoke_proc+0x57) [0x7faa0e3e7707] vm.c:1485
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_proc_call_kw+0x9c) [0x7faa0e2f1bbc] proc.c:973
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_cfp_consistent_p+0x0) [0x7faa0e3e79e6] vm_eval.c:95
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_cfunc_with_frame) vm_eval.c:97
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_cfunc) vm_eval.c:109
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_body) vm_eval.c:144
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_call0) vm_eval.c:57
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_call0+0x6a) [0x7faa0e3efc7e] vm_eval.c:361
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_call) vm_eval.c:689
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(iterate_method) vm_eval.c:1406
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_iterate0+0xf8) [0x7faa0e3d74b8] vm_eval.c:1355
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_block_call_kw+0x53) [0x7faa0e3d7753] vm_eval.c:1434
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(enumerator_block_call+0x59) [0x7faa0e200049] enumerator.c:555
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_cfp_consistent_p+0x0) [0x7faa0e3e79e6] vm_eval.c:95
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_cfunc_with_frame) vm_eval.c:97
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_cfunc) vm_eval.c:109
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call0_body) vm_eval.c:144
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_call0) vm_eval.c:57
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_call0+0x6a) [0x7faa0e3efc7e] vm_eval.c:361
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_call) vm_eval.c:689
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(iterate_method) vm_eval.c:1406
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_iterate0+0xf8) [0x7faa0e3d74b8] vm_eval.c:1355
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_block_call+0x53) [0x7faa0e3d76e3] vm_eval.c:1420
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(imemo_count_value+0x0) [0x7faa0e1f43c3] enum.c:282
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(enum_count) enum.c:283
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_cfp_consistent_p+0x0) [0x7faa0e3d203c] vm_insnhelper.c:2898
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call_cfunc_with_frame) vm_insnhelper.c:2900
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_sendish+0x366) [0x7faa0e3dc4e6] vm_insnhelper.c:4499
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_exec_core+0x9e) [0x7faa0e3df35e] insns.def:789
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_exec+0x182) [0x7faa0e3e4812] vm.c:2163
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_yield+0x25a) [0x7faa0e3f20da] vm.c:1263
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_ary_collect+0x5c) [0x7faa0e17d67c] array.c:3635
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_cfp_consistent_p+0x0) [0x7faa0e3d203c] vm_insnhelper.c:2898
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_call_cfunc_with_frame) vm_insnhelper.c:2900
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_sendish+0x366) [0x7faa0e3dc4e6] vm_insnhelper.c:4499
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(vm_exec_core+0x10d) [0x7faa0e3df3cd] insns.def:770
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(rb_vm_exec+0x182) [0x7faa0e3e4812] vm.c:2163
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(thread_do_start_proc+0x2a9) [0x7faa0e39db19] thread.c:725
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(thread_do_start+0x66) [0x7faa0e39e057] thread.c:766
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(thread_start_func_2) thread.c:822
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(register_cached_thread_and_wait+0x0) [0x7faa0e39e9ca] thread_pthread.c:994
/home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0(thread_start_func_1) thread_pthread.c:1001
/lib64/libpthread.so.0(start_thread+0xe9) [0x7faa0e0eb3f9]
/lib64/libc.so.6(clone+0x43) [0x7faa0de84b53]

-- Other runtime information -----------------------------------------------

* Loaded script: ractor.rb

* Loaded features:

    0 enumerator.so
    1 thread.rb
    2 rational.so
    3 complex.so
    4 ruby2_keywords.rb
    5 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/encdb.so
    6 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/trans/transdb.so
    7 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/rbconfig.rb
    8 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/compatibility.rb
    9 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/defaults.rb
   10 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/deprecate.rb
   11 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/errors.rb
   12 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/exceptions.rb
   13 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/basic_specification.rb
   14 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/stub_specification.rb
   15 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/text.rb
   16 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/user_interaction.rb
   17 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/specification_policy.rb
   18 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/util/list.rb
   19 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/platform.rb
   20 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/version.rb
   21 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/requirement.rb
   22 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/specification.rb
   23 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/util.rb
   24 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/dependency.rb
   25 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/core_ext/kernel_gem.rb
   26 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/monitor.so
   27 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/monitor.rb
   28 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/core_ext/kernel_require.rb
   29 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/core_ext/kernel_warn.rb
   30 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems.rb
   31 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems/path_support.rb
   32 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/version.rb
   33 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/core_ext/name_error.rb
   34 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/levenshtein.rb
   35 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/jaro_winkler.rb
   36 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/spell_checker.rb
   37 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/spell_checkers/name_error_checkers/class_name_checker.rb
   38 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/spell_checkers/name_error_checkers/variable_name_checker.rb
   39 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/spell_checkers/name_error_checkers.rb
   40 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/spell_checkers/method_name_checker.rb
   41 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/spell_checkers/key_error_checker.rb
   42 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/spell_checkers/null_checker.rb
   43 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/tree_spell_checker.rb
   44 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/spell_checkers/require_path_checker.rb
   45 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean/formatters/plain_formatter.rb
   46 /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/did_you_mean.rb

* Process memory map:

00400000-00401000 r--p 00000000 fd:03 17434847                           /home/fidalgo/.rbenv/versions/3.0.0/bin/ruby
00401000-00402000 r-xp 00001000 fd:03 17434847                           /home/fidalgo/.rbenv/versions/3.0.0/bin/ruby
00402000-00403000 r--p 00002000 fd:03 17434847                           /home/fidalgo/.rbenv/versions/3.0.0/bin/ruby
00403000-00404000 r--p 00002000 fd:03 17434847                           /home/fidalgo/.rbenv/versions/3.0.0/bin/ruby
00404000-00405000 rw-p 00003000 fd:03 17434847                           /home/fidalgo/.rbenv/versions/3.0.0/bin/ruby
01fa1000-10e06000 rw-p 00000000 00:00 0                                  [heap]
7fa9d0000000-7fa9d0f89000 rw-p 00000000 00:00 0 
7fa9d0f89000-7fa9d4000000 ---p 00000000 00:00 0 
7fa9d8000000-7fa9d8821000 rw-p 00000000 00:00 0 
7fa9d8821000-7fa9dc000000 ---p 00000000 00:00 0 
7fa9dc000000-7fa9dc021000 rw-p 00000000 00:00 0 
7fa9dc021000-7fa9e0000000 ---p 00000000 00:00 0 
7fa9e0000000-7fa9e1971000 rw-p 00000000 00:00 0 
7fa9e1971000-7fa9e4000000 ---p 00000000 00:00 0 
7fa9e4000000-7fa9e4afc000 rw-p 00000000 00:00 0 
7fa9e4afc000-7fa9e8000000 ---p 00000000 00:00 0 
7fa9e8000000-7fa9eab79000 rw-p 00000000 00:00 0 
7fa9eab79000-7fa9ec000000 ---p 00000000 00:00 0 
7fa9ec000000-7fa9edc05000 rw-p 00000000 00:00 0 
7fa9edc05000-7fa9f0000000 ---p 00000000 00:00 0 
7fa9f0000000-7fa9f3ac1000 rw-p 00000000 00:00 0 
7fa9f3ac1000-7fa9f4000000 ---p 00000000 00:00 0 
7fa9f6ab6000-7fa9f6dc9000 r--s 00000000 fd:01 3409179                    /usr/lib64/libc-2.32.so
7fa9f6dc9000-7fa9f79fd000 r--s 00000000 fd:03 17434849                   /home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0.0
7fa9f79fd000-7fa9f79fe000 ---p 00000000 00:00 0 
7fa9f79fe000-7fa9f7bfe000 rw-p 00000000 00:00 0 
7fa9f7bfe000-7fa9f7bff000 ---p 00000000 00:00 0 
7fa9f7bff000-7fa9f7dff000 rw-p 00000000 00:00 0 
7fa9f7dff000-7fa9f7e00000 ---p 00000000 00:00 0 
7fa9f7e00000-7fa9f8000000 rw-p 00000000 00:00 0 
7fa9f8000000-7fa9fbffd000 rw-p 00000000 00:00 0 
7fa9fbffd000-7fa9fc000000 ---p 00000000 00:00 0 
7fa9fc0d2000-7fa9fc0d3000 ---p 00000000 00:00 0 
7fa9fc0d3000-7fa9fc2d3000 rw-p 00000000 00:00 0 
7fa9fc2d3000-7fa9fc2d4000 ---p 00000000 00:00 0 
7fa9fc2d4000-7fa9fc4d4000 rw-p 00000000 00:00 0 
7fa9fc6d4000-7fa9fc6d5000 ---p 00000000 00:00 0 
7fa9fc6d5000-7fa9fcadb000 rw-p 00000000 00:00 0 
7fa9fcadb000-7fa9fcadc000 ---p 00000000 00:00 0 
7fa9fcadc000-7fa9fccdc000 rw-p 00000000 00:00 0 
7fa9fccdc000-7fa9fcedd000 rw-p 00000000 00:00 0 
7fa9fcfe7000-7fa9fd032000 r--s 00000000 fd:01 3418677                    /usr/lib64/libpthread-2.32.so
7fa9fd032000-7fa9fd069000 r--s 00000000 fd:03 17434847                   /home/fidalgo/.rbenv/versions/3.0.0/bin/ruby
7fa9fd069000-7fa9fd06c000 r--p 00000000 fd:01 3432683                    /usr/lib64/libgcc_s-10-20201125.so.1
7fa9fd06c000-7fa9fd07e000 r-xp 00003000 fd:01 3432683                    /usr/lib64/libgcc_s-10-20201125.so.1
7fa9fd07e000-7fa9fd082000 r--p 00015000 fd:01 3432683                    /usr/lib64/libgcc_s-10-20201125.so.1
7fa9fd082000-7fa9fd083000 r--p 00018000 fd:01 3432683                    /usr/lib64/libgcc_s-10-20201125.so.1
7fa9fd083000-7fa9fd084000 rw-p 00019000 fd:01 3432683                    /usr/lib64/libgcc_s-10-20201125.so.1
7fa9fd0a0000-7fa9fd2a6000 rw-p 00000000 00:00 0 
7fa9fd2a6000-7fa9fd2a7000 ---p 00000000 00:00 0 
7fa9fd2a7000-7fa9fd348000 rw-p 00000000 00:00 0 
7fa9fd348000-7fa9fd349000 ---p 00000000 00:00 0 
7fa9fd349000-7fa9fd3ea000 rw-p 00000000 00:00 0 
7fa9fd3ea000-7fa9fd3eb000 ---p 00000000 00:00 0 
7fa9fd3eb000-7fa9fd48c000 rw-p 00000000 00:00 0 
7fa9fd48c000-7fa9fd48d000 ---p 00000000 00:00 0 
7fa9fd48d000-7fa9fd52e000 rw-p 00000000 00:00 0 
7fa9fd52e000-7fa9fd52f000 ---p 00000000 00:00 0 
7fa9fd52f000-7fa9fd5d0000 rw-p 00000000 00:00 0 
7fa9fd5d0000-7fa9fd5d1000 ---p 00000000 00:00 0 
7fa9fd5d1000-7fa9fd672000 rw-p 00000000 00:00 0 
7fa9fd672000-7fa9fd673000 ---p 00000000 00:00 0 
7fa9fd673000-7fa9fd714000 rw-p 00000000 00:00 0 
7fa9fd714000-7fa9fd715000 ---p 00000000 00:00 0 
7fa9fd715000-7fa9fd7b6000 rw-p 00000000 00:00 0 
7fa9fd7b6000-7fa9fd7b7000 ---p 00000000 00:00 0 
7fa9fd7b7000-7fa9fd858000 rw-p 00000000 00:00 0 
7fa9fd858000-7fa9fd859000 ---p 00000000 00:00 0 
7fa9fd859000-7fa9fd8fa000 rw-p 00000000 00:00 0 
7fa9fd8fa000-7fa9fd8fb000 ---p 00000000 00:00 0 
7fa9fd8fb000-7fa9fd99c000 rw-p 00000000 00:00 0 
7fa9fd99c000-7fa9fd99d000 ---p 00000000 00:00 0 
7fa9fd99d000-7fa9fda3e000 rw-p 00000000 00:00 0 
7fa9fda3e000-7fa9fda3f000 ---p 00000000 00:00 0 
7fa9fda3f000-7fa9fdae0000 rw-p 00000000 00:00 0 
7fa9fdae0000-7fa9fdae1000 ---p 00000000 00:00 0 
7fa9fdae1000-7fa9fdb82000 rw-p 00000000 00:00 0 
7fa9fdb82000-7fa9fdb83000 ---p 00000000 00:00 0 
7fa9fdb83000-7fa9fdc24000 rw-p 00000000 00:00 0 
7fa9fdc24000-7fa9fdc25000 ---p 00000000 00:00 0 
7fa9fdc25000-7fa9fdcc6000 rw-p 00000000 00:00 0 
7fa9fdcc6000-7fa9fdcc7000 ---p 00000000 00:00 0 
7fa9fdcc7000-7fa9fdd68000 rw-p 00000000 00:00 0 
7fa9fdd68000-7fa9fdd69000 ---p 00000000 00:00 0 
7fa9fdd69000-7fa9fde0a000 rw-p 00000000 00:00 0 
7fa9fde0a000-7fa9fde0b000 ---p 00000000 00:00 0 
7fa9fde0b000-7fa9fdeac000 rw-p 00000000 00:00 0 
7fa9fdeac000-7fa9fdead000 ---p 00000000 00:00 0 
7fa9fdead000-7fa9fdf4e000 rw-p 00000000 00:00 0 
7fa9fdf4e000-7fa9fdf4f000 ---p 00000000 00:00 0 
7fa9fdf4f000-7fa9fdff0000 rw-p 00000000 00:00 0 
7fa9fdff0000-7fa9fdff1000 ---p 00000000 00:00 0 
7fa9fdff1000-7fa9fe092000 rw-p 00000000 00:00 0 
7fa9fe092000-7fa9fe093000 ---p 00000000 00:00 0 
7fa9fe093000-7fa9fe134000 rw-p 00000000 00:00 0 
7fa9fe134000-7fa9fe135000 ---p 00000000 00:00 0 
7fa9fe135000-7fa9fe1d6000 rw-p 00000000 00:00 0 
7fa9fe1d6000-7fa9fe1d7000 ---p 00000000 00:00 0 
7fa9fe1d7000-7fa9fe278000 rw-p 00000000 00:00 0 
7fa9fe278000-7fa9fe279000 ---p 00000000 00:00 0 
7fa9fe279000-7fa9fe31a000 rw-p 00000000 00:00 0 
7fa9fe31a000-7fa9fe31b000 ---p 00000000 00:00 0 
7fa9fe31b000-7fa9fe3bc000 rw-p 00000000 00:00 0 
7fa9fe3bc000-7fa9fe3bd000 ---p 00000000 00:00 0 
7fa9fe3bd000-7fa9fe45e000 rw-p 00000000 00:00 0 
7fa9fe45e000-7fa9fe45f000 ---p 00000000 00:00 0 
7fa9fe45f000-7fa9fe500000 rw-p 00000000 00:00 0 
7fa9fe500000-7fa9fe501000 ---p 00000000 00:00 0 
7fa9fe501000-7fa9fe5a2000 rw-p 00000000 00:00 0 
7fa9fe5a2000-7fa9fe5a3000 ---p 00000000 00:00 0 
7fa9fe5a3000-7fa9fe644000 rw-p 00000000 00:00 0 
7fa9fe644000-7fa9fe645000 ---p 00000000 00:00 0 
7fa9fe645000-7faa00851000 rw-p 00000000 00:00 0 
7faa00851000-7faa0dd81000 r--p 00000000 fd:01 3410919                    /usr/lib/locale/locale-archive
7faa0dd81000-7faa0dd83000 rw-p 00000000 00:00 0 
7faa0dd83000-7faa0dda9000 r--p 00000000 fd:01 3409179                    /usr/lib64/libc-2.32.so
7faa0dda9000-7faa0def8000 r-xp 00026000 fd:01 3409179                    /usr/lib64/libc-2.32.so
7faa0def8000-7faa0df43000 r--p 00175000 fd:01 3409179                    /usr/lib64/libc-2.32.so
7faa0df43000-7faa0df44000 ---p 001c0000 fd:01 3409179                    /usr/lib64/libc-2.32.so
7faa0df44000-7faa0df47000 r--p 001c0000 fd:01 3409179                    /usr/lib64/libc-2.32.so
7faa0df47000-7faa0df4a000 rw-p 001c3000 fd:01 3409179                    /usr/lib64/libc-2.32.so
7faa0df4a000-7faa0df4e000 rw-p 00000000 00:00 0 
7faa0df4e000-7faa0df5d000 r--p 00000000 fd:01 3418672                    /usr/lib64/libm-2.32.so
7faa0df5d000-7faa0dff9000 r-xp 0000f000 fd:01 3418672                    /usr/lib64/libm-2.32.so
7faa0dff9000-7faa0e092000 r--p 000ab000 fd:01 3418672                    /usr/lib64/libm-2.32.so
7faa0e092000-7faa0e093000 r--p 00143000 fd:01 3418672                    /usr/lib64/libm-2.32.so
7faa0e093000-7faa0e094000 rw-p 00144000 fd:01 3418672                    /usr/lib64/libm-2.32.so
7faa0e094000-7faa0e096000 rw-p 00000000 00:00 0 
7faa0e096000-7faa0e098000 r--p 00000000 fd:01 3434307                    /usr/lib64/libcrypt.so.2.0.0
7faa0e098000-7faa0e0ac000 r-xp 00002000 fd:01 3434307                    /usr/lib64/libcrypt.so.2.0.0
7faa0e0ac000-7faa0e0c5000 r--p 00016000 fd:01 3434307                    /usr/lib64/libcrypt.so.2.0.0
7faa0e0c5000-7faa0e0c6000 ---p 0002f000 fd:01 3434307                    /usr/lib64/libcrypt.so.2.0.0
7faa0e0c6000-7faa0e0c7000 r--p 0002f000 fd:01 3434307                    /usr/lib64/libcrypt.so.2.0.0
7faa0e0c7000-7faa0e0d0000 rw-p 00000000 00:00 0 
7faa0e0d0000-7faa0e0d2000 r--p 00000000 fd:01 3418670                    /usr/lib64/libdl-2.32.so
7faa0e0d2000-7faa0e0d4000 r-xp 00002000 fd:01 3418670                    /usr/lib64/libdl-2.32.so
7faa0e0d4000-7faa0e0d5000 r--p 00004000 fd:01 3418670                    /usr/lib64/libdl-2.32.so
7faa0e0d5000-7faa0e0d6000 r--p 00004000 fd:01 3418670                    /usr/lib64/libdl-2.32.so
7faa0e0d6000-7faa0e0d7000 rw-p 00000000 00:00 0 
7faa0e0d7000-7faa0e0da000 r--p 00000000 fd:01 3418687                    /usr/lib64/librt-2.32.so
7faa0e0da000-7faa0e0de000 r-xp 00003000 fd:01 3418687                    /usr/lib64/librt-2.32.so
7faa0e0de000-7faa0e0e0000 r--p 00007000 fd:01 3418687                    /usr/lib64/librt-2.32.so
7faa0e0e0000-7faa0e0e1000 r--p 00008000 fd:01 3418687                    /usr/lib64/librt-2.32.so
7faa0e0e1000-7faa0e0e2000 rw-p 00009000 fd:01 3418687                    /usr/lib64/librt-2.32.so
7faa0e0e2000-7faa0e0e9000 r--p 00000000 fd:01 3418677                    /usr/lib64/libpthread-2.32.so
7faa0e0e9000-7faa0e0f9000 r-xp 00007000 fd:01 3418677                    /usr/lib64/libpthread-2.32.so
7faa0e0f9000-7faa0e0fe000 r--p 00017000 fd:01 3418677                    /usr/lib64/libpthread-2.32.so
7faa0e0fe000-7faa0e0ff000 r--p 0001b000 fd:01 3418677                    /usr/lib64/libpthread-2.32.so
7faa0e0ff000-7faa0e100000 rw-p 0001c000 fd:01 3418677                    /usr/lib64/libpthread-2.32.so
7faa0e100000-7faa0e104000 rw-p 00000000 00:00 0 
7faa0e104000-7faa0e107000 r--p 00000000 fd:01 3429779                    /usr/lib64/libz.so.1.2.11
7faa0e107000-7faa0e115000 r-xp 00003000 fd:01 3429779                    /usr/lib64/libz.so.1.2.11
7faa0e115000-7faa0e11b000 r--p 00011000 fd:01 3429779                    /usr/lib64/libz.so.1.2.11
7faa0e11b000-7faa0e11c000 ---p 00017000 fd:01 3429779                    /usr/lib64/libz.so.1.2.11
7faa0e11c000-7faa0e11d000 r--p 00017000 fd:01 3429779                    /usr/lib64/libz.so.1.2.11
7faa0e11d000-7faa0e11e000 rw-p 00000000 00:00 0 
7faa0e123000-7faa0e124000 r--p 00000000 fd:03 17434925                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/monitor.so
7faa0e124000-7faa0e125000 r-xp 00001000 fd:03 17434925                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/monitor.so
7faa0e125000-7faa0e126000 r--p 00002000 fd:03 17434925                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/monitor.so
7faa0e126000-7faa0e127000 r--p 00002000 fd:03 17434925                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/monitor.so
7faa0e127000-7faa0e128000 rw-p 00003000 fd:03 17434925                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/monitor.so
7faa0e128000-7faa0e129000 r--p 00000000 fd:03 18225989                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/trans/transdb.so
7faa0e129000-7faa0e12b000 r-xp 00001000 fd:03 18225989                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/trans/transdb.so
7faa0e12b000-7faa0e12c000 r--p 00003000 fd:03 18225989                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/trans/transdb.so
7faa0e12c000-7faa0e12d000 r--p 00003000 fd:03 18225989                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/trans/transdb.so
7faa0e12d000-7faa0e12e000 rw-p 00004000 fd:03 18225989                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/trans/transdb.so
7faa0e12e000-7faa0e12f000 r--p 00000000 fd:03 17697632                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/encdb.so
7faa0e12f000-7faa0e130000 r-xp 00001000 fd:03 17697632                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/encdb.so
7faa0e130000-7faa0e131000 r--p 00002000 fd:03 17697632                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/encdb.so
7faa0e131000-7faa0e132000 r--p 00002000 fd:03 17697632                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/encdb.so
7faa0e132000-7faa0e133000 rw-p 00003000 fd:03 17697632                   /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/x86_64-linux/enc/encdb.so
7faa0e133000-7faa0e13a000 r--s 00000000 fd:01 3802244                    /usr/lib64/gconv/gconv-modules.cache
7faa0e13a000-7faa0e16b000 r--p 00000000 fd:03 17434849                   /home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0.0
7faa0e16b000-7faa0e407000 r-xp 00031000 fd:03 17434849                   /home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0.0
7faa0e407000-7faa0e50f000 r--p 002cd000 fd:03 17434849                   /home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0.0
7faa0e50f000-7faa0e510000 ---p 003d5000 fd:03 17434849                   /home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0.0
7faa0e510000-7faa0e517000 r--p 003d5000 fd:03 17434849                   /home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0.0
7faa0e517000-7faa0e51b000 rw-p 003dc000 fd:03 17434849                   /home/fidalgo/.rbenv/versions/3.0.0/lib/libruby.so.3.0.0
7faa0e51b000-7faa0e52d000 rw-p 00000000 00:00 0 
7faa0e52d000-7faa0e531000 r--p 00000000 00:00 0                          [vvar]
7faa0e531000-7faa0e533000 r-xp 00000000 00:00 0                          [vdso]
7faa0e533000-7faa0e534000 r--p 00000000 fd:01 3413984                    /usr/lib64/ld-2.32.so
7faa0e534000-7faa0e555000 r-xp 00001000 fd:01 3413984                    /usr/lib64/ld-2.32.so
7faa0e555000-7faa0e55e000 r--p 00022000 fd:01 3413984                    /usr/lib64/ld-2.32.so
7faa0e55e000-7faa0e55f000 r--p 0002a000 fd:01 3413984                    /usr/lib64/ld-2.32.so
7faa0e55f000-7faa0e561000 rw-p 0002b000 fd:01 3413984                    /usr/lib64/ld-2.32.so
7ffd9d9fc000-7ffd9e1fb000 rw-p 00000000 00:00 0                          [stack]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

Aborted (core dumped)

And here success with debugging:

ruby -d ractor.rb 
Exception `LoadError' at /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems.rb:1348 - cannot load such file -- rubygems/defaults/operating_system
Exception `LoadError' at /home/fidalgo/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems.rb:1356 - cannot load such file -- rubygems/defaults/ruby
Combinations size:2118760
<internal:ractor>:267: warning: Ractor is experimental, and the behavior may change in future versions of Ruby! Also there are many implementation issues.
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
Received combination size:264845
476330