Re: ruby segfaults

[ci4ic4 <ci4ic4%proton.me@localhost>]

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On Friday, 27 February 2026 at 1:43 PM, Takahiro Kambe <taca%back-street.net@localhost> wrote:

> In message <kdIo_gwVwx21HyIuZ98qmg4JGbukmg4587HtaLK6OhFOJrd43g5uXOn2kFdLirBrxX7JFzeKI84JAeYkFscQRC11qj-BiJMwfi3mz3mzBXU=@proton.me>
> 	on Thu, 26 Feb 2026 14:15:34 +0000,
> 	ci4ic4 <ci4ic4%proton.me@localhost> wrote:
> > FWIW I am getting the same panics using version 3.3:
> The same in 11.99.5 on evbarm-aarch64 (in VMware Fusion MacBook Air M2).
> 
> NetBSD 11.99.5 (GENERIC64) #0: Thu Feb  5 11:15:10 JST 2026  taca%m2evbarm.a.back-street.net@localhost:/data/11.99.5/evbarm/evbarm/sys/arch/evbarm/compile/GENERIC64
> 
> ...
> 
> /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:301: [BUG] Segmentation fault at 0x0000ffffffb59000
> ruby 3.3.10 (2025-10-23 revision 343ea05002) [aarch64-netbsd]
> 
> -- Control frame information -----------------------------------------------
> c:0011 p:---- s:0050 e:000049 CFUNC  :gsub
> c:0010 p:0011 s:0045 e:000044 METHOD /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:301
> c:0009 p:0006 s:0038 e:000037 BLOCK  /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:319 [FINISH]
> c:0008 p:---- s:0034 e:000033 CFUNC  :each_value
> c:0007 p:2045 s:0030 e:000029 CLASS  /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:318
> c:0006 p:0007 s:0027 e:000026 TOP    /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:11 [FINISH]
> c:0005 p:---- s:0024 e:000023 CFUNC  :require
> c:0004 p:0005 s:0019 e:000018 TOP    /usr/pkg/lib/ruby/3.3.0/rubygems.rb:9 [FINISH]
> c:0003 p:---- s:0012 e:000011 CFUNC  :require
> c:0002 p:0012 s:0007 e:000006 TOP    <internal:gem_prelude>:2 [FINISH]
> c:0001 p:0000 s:0003 E:001540 DUMMY  [FINISH]
> 
> -- Ruby level backtrace information ----------------------------------------
> <internal:gem_prelude>:2:in `<internal:gem_prelude>'
> <internal:gem_prelude>:2:in `require'
> /usr/pkg/lib/ruby/3.3.0/rubygems.rb:9:in `<top (required)>'
> /usr/pkg/lib/ruby/3.3.0/rubygems.rb:9:in `require'
> /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:11:in `<top (required)>'
> /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:318:in `<module:RbConfig>'
> /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:318:in `each_value'
> /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:319:in `block in <module:RbConfig>'
> /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:301:in `expand'
> /usr/pkg/lib/ruby/3.3.0/aarch64-netbsd/rbconfig.rb:301:in `gsub'
> 
> -- Threading information ---------------------------------------------------
> Total ractor count: 1
> Ruby thread count for this ractor: 1
> 
> # gdb /usr/pkg/bin/ruby33  ruby33.core
> GNU gdb (GDB) 16.3
> Copyright (C) 2024 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
> Type "show copying" and "show warranty" for details.
> This GDB was configured as "aarch64--netbsd".
> Type "show configuration" for configuration details.
> For bug reporting instructions, please see:
> <https://www.gnu.org/software/gdb/bugs/>.
> Find the GDB manual and other documentation resources online at:
>     <http://www.gnu.org/software/gdb/documentation/>.
> 
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from /usr/pkg/bin/ruby33...
> (No debugging symbols found in /usr/pkg/bin/ruby33)
> [New process 11509]
> [New process 9796]
> Core was generated by `ruby33'.
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0  0x0000f0bab99336bc in _lwp_kill () from /usr/lib/libc.so.12
> [Current thread is 1 (process 11509)]
> (gdb) where
> #0  0x0000f0bab99336bc in _lwp_kill () from /usr/lib/libc.so.12
> #1  0x0000f0bab9e18fc8 in rb_bug_for_fatal_signal ()
>    from /usr/pkg/lib/libruby33.so.33
> #2  0x0000f0bab9f2d1ac in sigsegv () from /usr/pkg/lib/libruby33.so.33
> #3  <signal handler called>
> #4  0x0000f0bab9e395d0 in each_location.constprop ()
>    from /usr/pkg/lib/libruby33.so.33
> #5  0x0000f0bab9e39704 in mark_current_machine_context ()
>    from /usr/pkg/lib/libruby33.so.33
> #6  0x0000f0bab9e39bc4 in gc_mark_roots () from /usr/pkg/lib/libruby33.so.33
> #7  0x0000f0bab9e3fd5c in gc_start () from /usr/pkg/lib/libruby33.so.33
> #8  0x0000f0bab9e40f6c in newobj_alloc () from /usr/pkg/lib/libruby33.so.33
> #9  0x0000f0bab9e424d0 in rb_imemo_new () from /usr/pkg/lib/libruby33.so.33
> #10 0x0000f0bab9f95cf8 in lep_svar_set () from /usr/pkg/lib/libruby33.so.33
> #11 0x0000f0bab9f025e0 in rb_reg_search_set_match ()
>    from /usr/pkg/lib/libruby33.so.33
> #12 0x0000f0bab9f506ec in str_gsub () from /usr/pkg/lib/libruby33.so.33
> #13 0x0000f0bab9f9cf50 in vm_call_cfunc_with_frame_ ()
>    from /usr/pkg/lib/libruby33.so.33
> #14 0x0000f0bab9fabe64 in vm_exec_core () from /usr/pkg/lib/libruby33.so.33
> #15 0x0000f0bab9fae3e8 in rb_vm_exec () from /usr/pkg/lib/libruby33.so.33
> #16 0x0000f0bab9fb2bb8 in rb_yield () from /usr/pkg/lib/libruby33.so.33
> #17 0x0000f0bab9e43f34 in each_value_i () from /usr/pkg/lib/libruby33.so.33
> #18 0x0000f0bab9e43c50 in hash_foreach_iter ()
>    from /usr/pkg/lib/libruby33.so.33
> #19 0x0000f0bab9f364ec in st_general_foreach ()
>    from /usr/pkg/lib/libruby33.so.33
> #20 0x0000f0bab9e46b28 in hash_foreach_call ()
>    from /usr/pkg/lib/libruby33.so.33
> #21 0x0000f0bab9e21bc8 in rb_ensure () from /usr/pkg/lib/libruby33.so.33
> #22 0x0000f0bab9e48e5c in rb_hash_foreach () from /usr/pkg/lib/libruby33.so.33
> #23 0x0000f0bab9e49cb0 in rb_hash_each_value ()
>    from /usr/pkg/lib/libruby33.so.33
> #24 0x0000f0bab9f9cf50 in vm_call_cfunc_with_frame_ ()
>    from /usr/pkg/lib/libruby33.so.33
> #25 0x0000f0bab9fabe64 in vm_exec_core () from /usr/pkg/lib/libruby33.so.33
> #26 0x0000f0bab9fae3e8 in rb_vm_exec () from /usr/pkg/lib/libruby33.so.33
> #27 0x0000f0bab9e783cc in require_internal () from /usr/pkg/lib/libruby33.so.33
> #28 0x0000f0bab9e78438 in rb_require_string_internal ()
>    from /usr/pkg/lib/libruby33.so.33
> #29 0x0000f0bab9e78a60 in rb_require_string ()
>    from /usr/pkg/lib/libruby33.so.33
> #30 0x0000f0bab9f9cf50 in vm_call_cfunc_with_frame_ ()
>    from /usr/pkg/lib/libruby33.so.33
> #31 0x0000f0bab9fa8e70 in vm_exec_core () from /usr/pkg/lib/libruby33.so.33
> #32 0x0000f0bab9fae3e8 in rb_vm_exec () from /usr/pkg/lib/libruby33.so.33
> #33 0x0000f0bab9e783cc in require_internal () from /usr/pkg/lib/libruby33.so.33
> #34 0x0000f0bab9e78438 in rb_require_string_internal ()
>    from /usr/pkg/lib/libruby33.so.33
> #35 0x0000f0bab9e78a60 in rb_require_string ()
>    from /usr/pkg/lib/libruby33.so.33
> #36 0x0000f0bab9f9cf50 in vm_call_cfunc_with_frame_ ()
>    from /usr/pkg/lib/libruby33.so.33
> #37 0x0000f0bab9fa8e70 in vm_exec_core () from /usr/pkg/lib/libruby33.so.33
> --Type <RET> for more, q to quit, c to continue without paging--
> #38 0x0000f0bab9fae3e8 in rb_vm_exec () from /usr/pkg/lib/libruby33.so.33
> #39 0x0000f0bab9f283d4 in ruby_opt_init.part ()
>    from /usr/pkg/lib/libruby33.so.33
> #40 0x0000f0bab9f288f0 in load_file_internal ()
>    from /usr/pkg/lib/libruby33.so.33
> #41 0x0000f0bab9e21bc8 in rb_ensure () from /usr/pkg/lib/libruby33.so.33
> #42 0x0000f0bab9f29ad0 in process_options () from /usr/pkg/lib/libruby33.so.33
> #43 0x0000f0bab9f2a3bc in ruby_process_options ()
>    from /usr/pkg/lib/libruby33.so.33
> #44 0x0000f0bab9e22c94 in ruby_options () from /usr/pkg/lib/libruby33.so.33
> #45 0x00000000081b0f4c in main ()
> 
> --
> Takahiro Kambe <taca%back-street.net@localhost>


Interesting. 

I replaced ruby 3.3 with 4.01, on both my aarch64 and amd64 systems. 'make test' passes just fine several times on both of them; my previous crash was building games/greed 4.4 - this now builds without any problem on aarch64, but on amd64 I get roughly 50% of the builds - the rest fail the same way. 

Again, FWIW... 

 
>