[ruby-core:107279] [Ruby master Bug#18501] [BUG] try to mark T_NONE object in RubyVM::InstructionSequence. load_from_binary

Issue #18501 has been updated by tenderlovemaking (Aaron Patterson).

File 0001-Guard-hash-k-v.patch added

## Hash is writing T_NONE references

I think it's possible that T_NONE objects are being written in to a hash.  Basically we dup the string key, and if the hash needs to expand, it does so before actually inserting the key.  The expansion of the hash causes a malloc which kicks the GC, and the compiler has optimized the code such that the GC doesn't see a reference to the object in the stack or a register.

The GC ends up collecting the string, then the Hash writes a T_NONE to the underlying table.

Lets follow the order of events for code like this:

```ruby
hash["foo"] = "bar"
```

### 1. Ruby -> [`rb_hash_aset`](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L2911) is called

This function checks if the key is a string, and if so it does something special.  Namely, it calls `RHASH_UPDATE_ITER` with a special callback `hash_aset_str`.  `RHASH_UPDATE_ITER` is just a wrapper for `tbl_update`.

### 2. `rb_hash_aset` -> [`tbl_update`](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1724).

This function just calls in to `rb_hash_stlike_update` along with a struct.  The [`func` member](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1728) of the struct is our callback `hash_aset_str`.

### 3. `tbl_update` -> [`rb_hash_stlike_update`](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1681)

This function just checks if we have an AR table or not.  In this case, we have an AR table, so we just call `ar_update`.  `arg` is passed to `ar_update` and it has the `hash_aset_str` function pointer.  We also [pass `tbl_update_modify`](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1732) as a callback.

### 4. `rb_hash_stlike_update` -> [`ar_update`](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1000-L1001)

`ar_update` does some checks, then eventually [calls `tbl_update_modify` as a callback, passing arg](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1028).

### 5. `ar_update` -> [`tbl_update_modify`](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1697)

`tbl_update_modify` finally [calls `hash_aset_str` as a callback](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1703)

### 6. `tbl_update_modify` -> [`hash_aset_str`](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L2872-L2873)

`hash_aset_str` checks the key.  The key doesn't exist (it's new), but it's also not frozen.  So we allocate a new frozen string object and [assign that to `*key`](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L2876) so that the caller can read it.

Now we return up the stack.  `hash_aset_str` returns control to `tbl_update_modify`

### 7. `tbl_update_modify`

`tbl_update_modify` [executes a write barrier on the key and value](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1711-L1712).

This is odd because the key and value **haven't been written yet**.  Neither are reachable via the hash yet.  Since we have allocated a new string, the string's liveness depends on being found in the C stack or a register.  It's not referenced from the hash yet.

I think it's OK if the write barrier happens here, but it is odd that we execute the barrier but the reference isn't "real" yet.

`tbl_update_modify` returns control to `ar_update`

### 8. `ar_update`

`ar_update` finally [adds the reference to the hash](https://github.com/ruby/ruby/blob/b815a0bd75b660652bf05479467904fa06399092/hash.c#L1034).

I think this is where the bug is.  Adding a reference to the hash could cause the hash to expand which would cause xmalloc to execute, and this could cause GC to run.  The compiler could have optimized this code in such a way that the reference to the key is not on the stack and no longer in a register.


----------------------------------------
Bug #18501: [BUG] try to mark T_NONE object in RubyVM::InstructionSequence. load_from_binary
https://bugs.ruby-lang.org/issues/18501#change-96143

* Author: byroot (Jean Boussier)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.1.0p0 (2021-12-25 revision fb4df44d16) [x86_64-linux]
* Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
```
<OBJ_INFO:gc_mark_ptr@gc.c:6709> 0x00007fbf1fba1270 [2 M    ] T_NONE
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:49: [BUG] try to mark T_NONE object
ruby 3.1.0p0 (2021-12-25 revision fb4df44d16) [x86_64-linux]
 
-- Control frame information -----------------------------------------------
c:0024 p:---- s:0126 e:000125 CFUNC  :load_from_binary
c:0023 p:0017 s:0121 e:000120 METHOD /tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:49 [FINISH]
c:0022 p:---- s:0114 e:000113 CFUNC  :fetch
c:0021 p:0061 s:0106 e:000105 METHOD /tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:60
c:0020 p:0053 s:0099 e:000098 METHOD /tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:85 [FINISH]
c:0019 p:---- s:0093 e:000092 CFUNC  :require
c:0018 p:0065 s:0088 e:000087 METHOD /tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:28
c:0017 p:0066 s:0077 e:000076 METHOD /tmp/bundle/ruby/3.1.0/gems/zeitwerk-2.5.3/lib/zeitwerk/kernel.rb:35
c:0016 p:0005 s:0069 e:000068 BLOCK  /app/test/load_selected_tests.rb:11 [FINISH]
c:0015 p:---- s:0065 e:000064 CFUNC  :each
c:0014 p:0006 s:0061 e:000060 METHOD /app/test/load_selected_tests.rb:10
c:0013 p:0025 s:0057 e:000056 TOP    /app/test/load_selected_tests.rb:28 [FINISH]
c:0012 p:---- s:0054 e:000053 CFUNC  :require
c:0011 p:0016 s:0049 e:000048 BLOCK  /tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:287 [FINISH]
c:0010 p:---- s:0045 e:000044 CFUNC  :each
c:0009 p:0008 s:0041 e:000040 METHOD /tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:286
c:0008 p:0221 s:0037 E:001fd0 METHOD /tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:78 [FINISH]
c:0007 p:---- s:0031 e:000030 CFUNC  :public_send
c:0006 p:0073 s:0026 e:000025 METHOD /tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:35
c:0005 p:0007 s:0021 e:000020 METHOD /tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:19
c:0004 p:0034 s:0016 e:000015 TOP    /tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/exe/minitest-queue:5 [FINISH]
c:0003 p:---- s:0013 e:000012 CFUNC  :load
c:0002 p:0124 s:0008 E:0023a0 EVAL   /tmp/bundle/ruby/3.1.0/bin/minitest-queue:25 [FINISH]
c:0001 p:0000 s:0003 E:002230 (none) [FINISH]
 
-- Ruby level backtrace information ----------------------------------------
/tmp/bundle/ruby/3.1.0/bin/minitest-queue:25:in `<main>'
/tmp/bundle/ruby/3.1.0/bin/minitest-queue:25:in `load'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/exe/minitest-queue:5:in `<top (required)>'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:19:in `invoke'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:35:in `run!'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:35:in `public_send'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:78:in `run_command'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:286:in `load_tests'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:286:in `each'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:287:in `block in load_tests'
/tmp/bundle/ruby/3.1.0/gems/ci-queue-0.22.0/lib/minitest/queue/runner.rb:287:in `require'
/app/test/load_selected_tests.rb:28:in `<top (required)>'
/app/test/load_selected_tests.rb:10:in `require_tests'
/app/test/load_selected_tests.rb:10:in `each'
/app/test/load_selected_tests.rb:11:in `block in require_tests'
/tmp/bundle/ruby/3.1.0/gems/zeitwerk-2.5.3/lib/zeitwerk/kernel.rb:35:in `require'
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:28:in `require'
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:28:in `require'
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:85:in `load_iseq'
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:60:in `fetch'
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:60:in `fetch'
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:49:in `storage_to_output'
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/compile_cache/iseq.rb:49:in `load_from_binary'
 
-- C level backtrace information -------------------------------------------
/usr/local/ruby/bin/ruby(rb_print_backtrace+0x11) [0x555912686188] vm_dump.c:759
/usr/local/ruby/bin/ruby(rb_vm_bugreport) vm_dump.c:1045
/usr/local/ruby/bin/ruby(bug_report_end+0x0) [0x555912732edf] error.c:797
/usr/local/ruby/bin/ruby(rb_bug_without_die) error.c:797
/usr/local/ruby/bin/ruby(die+0x0) [0x5559124a492c] error.c:805
/usr/local/ruby/bin/ruby(rb_bug) error.c:807
/usr/local/ruby/bin/ruby(gc_mark_ptr+0x138) [0x5559124c6468] gc.c:6710
/usr/local/ruby/bin/ruby(gc_mark+0xb) [0x5559124c6b9b] gc.c:6743
/usr/local/ruby/bin/ruby(mark_keyvalue) gc.c:6303
/usr/local/ruby/bin/ruby(apply_functor+0x13) [0x5559125e7516] st.c:1570
/usr/local/ruby/bin/ruby(st_general_foreach) st.c:1480
/usr/local/ruby/bin/ruby(rb_st_foreach) st.c:1577
/usr/local/ruby/bin/ruby(mark_hash+0xf) [0x5559124c81d7] gc.c:6335
/usr/local/ruby/bin/ruby(gc_mark_children) gc.c:6947
/usr/local/ruby/bin/ruby(gc_marks_wb_unprotected_objects_plane+0x1e) [0x5559124c997e] gc.c:7864
/usr/local/ruby/bin/ruby(rgengc_rememberset_mark_plane) gc.c:7856
/usr/local/ruby/bin/ruby(rgengc_rememberset_mark) gc.c:8319
/usr/local/ruby/bin/ruby(gc_marks_start) gc.c:7844
/usr/local/ruby/bin/ruby(gc_marks) gc.c:8145
/usr/local/ruby/bin/ruby(gc_start) gc.c:8963
/usr/local/ruby/bin/ruby(rb_multi_ractor_p+0x0) [0x5559124ce372] gc.c:8849
/usr/local/ruby/bin/ruby(rb_vm_lock_leave) vm_sync.h:92
/usr/local/ruby/bin/ruby(garbage_collect) gc.c:8851
/usr/local/ruby/bin/ruby(garbage_collect_with_gvl) gc.c:9221
/usr/local/ruby/bin/ruby(objspace_malloc_increase_body) gc.c:11294
/usr/local/ruby/bin/ruby(objspace_malloc_increase_body) gc.c:11272
/usr/local/ruby/bin/ruby(objspace_malloc_fixup) gc.c:11372
/usr/local/ruby/bin/ruby(objspace_xmalloc0) gc.c:11443
/usr/local/ruby/bin/ruby(rb_st_init_table_with_size+0x79) [0x5559125e4f59] st.c:551
/usr/local/ruby/bin/ruby(rebuild_table+0x1e7) [0x5559125e51f7] st.c:727
/usr/local/ruby/bin/ruby(rebuild_table_if_necessary+0xc) [0x5559125e6f14] st.c:1071
/usr/local/ruby/bin/ruby(st_add_direct_with_hash) st.c:1131
/usr/local/ruby/bin/ruby(rb_st_update) st.c:1428
/usr/local/ruby/bin/ruby(register_fstring+0x34) [0x55591260af6e] string.c:450
/usr/local/ruby/bin/ruby(rb_enc_interned_str) string.c:11960
/usr/local/ruby/bin/ruby(ibf_load_object+0xca) [0x5559126cb7aa] compile.c:12567
/usr/local/ruby/bin/ruby(ibf_load_code+0x427) [0x5559126f03e7] compile.c:12541
/usr/local/ruby/bin/ruby(ibf_load_iseq_each+0xca1) [0x5559126ec99b] compile.c:11866
/usr/local/ruby/bin/ruby(rb_ibf_load_iseq_complete) compile.c:12748
/usr/local/ruby/bin/ruby(ibf_load_iseq+0xf2) [0x5559126eff82] compile.c:12803
/usr/local/ruby/bin/ruby(ibf_load_code+0x478) [0x5559126f0438] compile.c:11166
/usr/local/ruby/bin/ruby(ibf_load_iseq_each+0xca1) [0x5559126ec99b] compile.c:11866
/usr/local/ruby/bin/ruby(rb_ibf_load_iseq_complete) compile.c:12748
/usr/local/ruby/bin/ruby(ibf_load_iseq+0xf2) [0x5559126eff82] compile.c:12803
/usr/local/ruby/bin/ruby(rb_iseq_ibf_load+0xb3) [0x5559126f1393] compile.c:12909
/usr/local/ruby/bin/ruby(iseqw_s_load_from_binary+0x10) [0x555912506dc0] iseq.c:3600
/usr/local/ruby/bin/ruby(vm_cfp_consistent_p+0x0) [0x555912666909] vm_insnhelper.c:3037
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame) vm_insnhelper.c:3039
/usr/local/ruby/bin/ruby(vm_sendish+0xe) [0x555912677a93] vm_insnhelper.c:4751
/usr/local/ruby/bin/ruby(vm_exec_core) insns.def:778
/usr/local/ruby/bin/ruby(rb_vm_exec+0xb6) [0x555912668f96] vm.c:2211
/usr/local/ruby/bin/ruby(vm_call0_body+0x4db) [0x555912670e7b] vm_eval.c:205
/usr/local/ruby/bin/ruby(rb_funcallv_scope+0x1aa) [0x555912674caa] vm_eval.c:86
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/bootsnap.so(try_storage_to_output+0x6c) [0x7fc01c93fc4c] bootsnap.c:943
/usr/local/ruby/bin/ruby(rb_protect+0xfc) [0x5559124aaeec] eval.c:967
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/bootsnap.so(fetch_cached_data+0x48) [0x7fc01c9407e0] bootsnap.c:955
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/bootsnap.so(bs_fetch) bootsnap.c:737
/tmp/bundle/ruby/3.1.0/gems/bootsnap-1.10.1/lib/bootsnap/bootsnap.so(bs_rb_fetch) bootsnap.c:359
/usr/local/ruby/bin/ruby(vm_cfp_consistent_p+0x0) [0x555912666909] vm_insnhelper.c:3037
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame) vm_insnhelper.c:3039
/usr/local/ruby/bin/ruby(vm_sendish+0xe) [0x555912677a93] vm_insnhelper.c:4751
/usr/local/ruby/bin/ruby(vm_exec_core) insns.def:778
/usr/local/ruby/bin/ruby(rb_vm_exec+0xb6) [0x555912668f96] vm.c:2211
/usr/local/ruby/bin/ruby(vm_call0_body+0x4db) [0x555912670e7b] vm_eval.c:205
/usr/local/ruby/bin/ruby(rb_vm_call0+0xc7) [0x5559126716d7] vm_eval.c:57
/usr/local/ruby/bin/ruby(rb_vm_call_kw+0x1e) [0x555912672a1c] vm_eval.c:302
/usr/local/ruby/bin/ruby(rb_check_funcall_default_kw) vm_eval.c:690
/usr/local/ruby/bin/ruby(RB_IMMEDIATE_P+0x0) [0x55591250d79a] iseq.c:956
/usr/local/ruby/bin/ruby(RB_SPECIAL_CONST_P) ./include/ruby/internal/special_consts.h:262
/usr/local/ruby/bin/ruby(rb_iseq_load_iseq) iseq.c:958
/usr/local/ruby/bin/ruby(load_iseq_eval+0xa) [0x5559125152c6] load.c:644
/usr/local/ruby/bin/ruby(require_internal) load.c:1132
/usr/local/ruby/bin/ruby(rb_require_string+0x2c) [0x5559125154b9] load.c:1223
/usr/local/ruby/bin/ruby(rb_f_require) load.c:904
/usr/local/ruby/bin/ruby(vm_cfp_consistent_p+0x0) [0x555912666909] vm_insnhelper.c:3037
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame) vm_insnhelper.c:3039
/usr/local/ruby/bin/ruby(vm_call_method_each_type+0x79) [0x55591266a0d9] vm_insnhelper.c:3639
/usr/local/ruby/bin/ruby(vm_call_alias+0x87) [0x55591266b987] vm_insnhelper.c:3189
/usr/local/ruby/bin/ruby(vm_sendish+0xe) [0x555912677a93] vm_insnhelper.c:4751
/usr/local/ruby/bin/ruby(vm_exec_core) insns.def:778
/usr/local/ruby/bin/ruby(rb_vm_exec+0xb6) [0x555912668f96] vm.c:2211
/usr/local/ruby/bin/ruby(rb_yield+0x256) [0x55591266e346] vm.c:1316
/usr/local/ruby/bin/ruby(RB_FL_TEST_RAW+0x0) [0x55591269630c] array.c:2522
/usr/local/ruby/bin/ruby(RB_FL_ANY_RAW) ./include/ruby/internal/fl_type.h:558
/usr/local/ruby/bin/ruby(rb_array_len) ./include/ruby/internal/core/rarray.h:302
/usr/local/ruby/bin/ruby(rb_ary_each) array.c:2521
/usr/local/ruby/bin/ruby(vm_cfp_consistent_p+0x0) [0x555912666909] vm_insnhelper.c:3037
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame) vm_insnhelper.c:3039
/usr/local/ruby/bin/ruby(vm_sendish+0xc) [0x555912677b9d] vm_insnhelper.c:4751
/usr/local/ruby/bin/ruby(vm_exec_core) insns.def:759
/usr/local/ruby/bin/ruby(rb_vm_exec+0xb6) [0x555912668f96] vm.c:2211
/usr/local/ruby/bin/ruby(load_iseq_eval+0xa) [0x5559125152fa] load.c:656
/usr/local/ruby/bin/ruby(require_internal) load.c:1132
/usr/local/ruby/bin/ruby(rb_require_string+0x2c) [0x5559125154b9] load.c:1223
/usr/local/ruby/bin/ruby(rb_f_require) load.c:904
/usr/local/ruby/bin/ruby(vm_cfp_consistent_p+0x0) [0x555912666909] vm_insnhelper.c:3037
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame) vm_insnhelper.c:3039
/usr/local/ruby/bin/ruby(vm_call_method_each_type+0x79) [0x55591266a0d9] vm_insnhelper.c:3639
/usr/local/ruby/bin/ruby(vm_call_alias+0x87) [0x55591266b987] vm_insnhelper.c:3189
/usr/local/ruby/bin/ruby(vm_call_method_each_type+0x269) [0x55591266a2c9] vm_insnhelper.c:3675
/usr/local/ruby/bin/ruby(vm_call_method+0xb4) [0x55591266a9a4] vm_insnhelper.c:3750
/usr/local/ruby/bin/ruby(vm_sendish+0xe) [0x555912677a93] vm_insnhelper.c:4751
/usr/local/ruby/bin/ruby(vm_exec_core) insns.def:778
/usr/local/ruby/bin/ruby(rb_vm_exec+0xb6) [0x555912668f96] vm.c:2211
/usr/local/ruby/bin/ruby(rb_yield+0x256) [0x55591266e346] vm.c:1316
/usr/local/ruby/bin/ruby(RB_FL_TEST_RAW+0x0) [0x55591269630c] array.c:2522
/usr/local/ruby/bin/ruby(RB_FL_ANY_RAW) ./include/ruby/internal/fl_type.h:558
/usr/local/ruby/bin/ruby(rb_array_len) ./include/ruby/internal/core/rarray.h:302
/usr/local/ruby/bin/ruby(rb_ary_each) array.c:2521
/usr/local/ruby/bin/ruby(vm_cfp_consistent_p+0x0) [0x555912666909] vm_insnhelper.c:3037
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame) vm_insnhelper.c:3039
/usr/local/ruby/bin/ruby(vm_sendish+0xc) [0x555912677b9d] vm_insnhelper.c:4751
/usr/local/ruby/bin/ruby(vm_exec_core) insns.def:759
/usr/local/ruby/bin/ruby(rb_vm_exec+0xb6) [0x555912668f96] vm.c:2211
/usr/local/ruby/bin/ruby(vm_call0_body+0x4db) [0x555912670e7b] vm_eval.c:205
/usr/local/ruby/bin/ruby(rb_call0+0x20d) [0x555912673bad] vm_eval.c:86
/usr/local/ruby/bin/ruby(send_internal+0xef) [0x5559126742af] vm_eval.c:1261
/usr/local/ruby/bin/ruby(vm_cfp_consistent_p+0x0) [0x555912666909] vm_insnhelper.c:3037
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame) vm_insnhelper.c:3039
/usr/local/ruby/bin/ruby(vm_call_method_each_type+0x79) [0x55591266a0d9] vm_insnhelper.c:3639
/usr/local/ruby/bin/ruby(vm_call_method+0xb4) [0x55591266a9a4] vm_insnhelper.c:3750
/usr/local/ruby/bin/ruby(vm_sendish+0xe) [0x555912677a93] vm_insnhelper.c:4751
/usr/local/ruby/bin/ruby(vm_exec_core) insns.def:778
/usr/local/ruby/bin/ruby(rb_vm_exec+0xb6) [0x555912668f96] vm.c:2211
/usr/local/ruby/bin/ruby(raise_load_if_failed+0x0) [0x5559125140cc] load.c:656
/usr/local/ruby/bin/ruby(rb_load_internal) load.c:719
/usr/local/ruby/bin/ruby(rb_f_load+0xb1) [0x555912514271] load.c:792
/usr/local/ruby/bin/ruby(vm_cfp_consistent_p+0x0) [0x555912666909] vm_insnhelper.c:3037
/usr/local/ruby/bin/ruby(vm_call_cfunc_with_frame) vm_insnhelper.c:3039
/usr/local/ruby/bin/ruby(vm_call_method_each_type+0x79) [0x55591266a0d9] vm_insnhelper.c:3639
/usr/local/ruby/bin/ruby(vm_call_method+0xb4) [0x55591266a9a4] vm_insnhelper.c:3750
/usr/local/ruby/bin/ruby(vm_sendish+0xe) [0x555912677a93] vm_insnhelper.c:4751
/usr/local/ruby/bin/ruby(vm_exec_core) insns.def:778
/usr/local/ruby/bin/ruby(rb_vm_exec+0xb6) [0x555912668f96] vm.c:2211
/usr/local/ruby/bin/ruby(rb_ec_exec_node+0xbb) [0x5559124a4efb] eval.c:280
/usr/local/ruby/bin/ruby(ruby_run_node+0x4f) [0x5559124aa13f] eval.c:321
/usr/local/ruby/bin/ruby(main+0x5f) [0x5559124a4c7f] error.c:3180
 ```

From my limited understanding it seems to happen if GC triggers at a very specific point.

---Files--------------------------------
0001-Guard-hash-k-v.patch (881 Bytes)


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