Issue #21655 has been updated by kurly (Greg Kubaryk). backtrace using a gentoo-built build with -ggdb3 added to CFLAGS ``` beans ~ # cd /var/tmp/portage/dev-lang/ruby-3.3.10/work/ruby-3.3.10/ beans /var/tmp/portage/dev-lang/ruby-3.3.10/work/ruby-3.3.10 # gdb --args ./miniruby -I./lib -I. -I.ext/common -n -e 'BEGIN{version=ARGV.shift;mis=ARGV.dup}' -e 'END{abort "UNICODE version mismatch: #{mis}" unless mis.empty?}' -e '(mis.delete(ARGF.path); ARGF.close) if /ONIG_UNICODE_VERSION_STRING +"#{Regexp.quote(version)}"/o' 15.0.0 ./enc/unicode/15.0.0/casefold.h ./enc/unicode/15.0.0/name2ctype.h ./miniruby -I./lib -I. -I.ext/common ./tool/generic_erb.rb -o builtin_binary.inc ./template/builtin_binary.inc.tmpl GNU gdb (Gentoo 16.3 vanilla) 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 "x86_64-pc-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://bugs.gentoo.org/>. 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 ./miniruby... warning: File "/var/tmp/portage/dev-lang/ruby-3.3.10/work/ruby-3.3.10/.gdbinit" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load". To enable execution of this file add add-auto-load-safe-path /var/tmp/portage/dev-lang/ruby-3.3.10/work/ruby-3.3.10/.gdbinit line to your configuration file "/root/.config/gdb/gdbinit". To completely disable this security protection add set auto-load safe-path / line to your configuration file "/root/.config/gdb/gdbinit". For more information about this security protection see the "Auto-loading safe path" section in the GDB manual. E.g., run from the shell: info "(gdb)Auto-loading safe path" (gdb) run Starting program: /var/tmp/portage/dev-lang/ruby-3.3.10/work/ruby-3.3.10/miniruby -I./lib -I. -I.ext/common -n -e BEGIN\{version=ARGV.shift\;mis=ARGV.dup\} -e END\{abort\ \"UNICODE\ version\ mismatch:\ \#\{mis\}\"\ unless\ mis.empty\?\} -e \(mis.delete\(ARGF.path\)\;\ ARGF.close\)\ if\ /ONIG_UNICODE_VERSION_STRING\ +\"\#\{Regexp.quote\(version\)\}\"/o 15.0.0 ./enc/unicode/15.0.0/casefold.h ./enc/unicode/15.0.0/name2ctype.h ./miniruby -I./lib -I. -I.ext/common ./tool/generic_erb.rb -o builtin_binary.inc ./template/builtin_binary.inc.tmpl [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7c76d69 in malloc_usable_size () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff7c76d69 in malloc_usable_size () from /lib64/libc.so.6 #1 0x000055555563b490 in objspace_malloc_size (objspace=0x5555559a7550, ptr=0x45005555559e6dc0, hint=<optimized out>) at gc.c:12381 #2 objspace_xrealloc (objspace=0x5555559a7550, ptr=0x45005555559e6dc0, new_size=18, old_size=<optimized out>) at gc.c:12689 #3 0x0000555555760a8a in rb_str_resize (str=str@entry=140737348585000, len=17) at string.c:3179 #4 0x0000555555760c2d in rb_fstring (str=str@entry=140737348585000) at ./include/ruby/internal/core/rstring.h:369 #5 0x00005555557a32c8 in build_const_pathname (head=<optimized out>, tail=140737348585040) at variable.c:397 #6 rb_set_class_path_string (klass=klass@entry=140737348547760, under=under@entry=140737348551920, name=140737348585040) at variable.c:417 #7 0x000055555559c2f4 in rb_define_class_id_under_no_pin (outer=140737348551920, id=10891, super=140737348552240, super@entry=93824992527378) at class.c:1035 #8 0x000055555559c412 in rb_define_class_id_under (outer=<optimized out>, id=<optimized out>, super=super@entry=93824992527378) at class.c:1045 #9 0x000055555559c470 in rb_define_class_under (outer=<optimized out>, name=name@entry=0x555555846fdc "EADDRINUSE", super=93824992527378) at class.c:1006 #10 0x000055555560e153 in set_syserr (n=n@entry=98, name=name@entry=0x555555846fdc "EADDRINUSE") at error.c:2711 #11 0x00005555556148e9 in Init_syserr () at /var/tmp/portage/dev-lang/ruby-3.3.10/work/ruby-3.3.10/known_errors.inc:18 #12 0x0000555555647eaa in rb_call_inits () at inits.c:40 #13 0x0000555555618943 in ruby_setup () at eval.c:89 #14 0x000055555561a40d in ruby_init () at eval.c:101 #15 0x0000555555576193 in rb_main (argc=22, argv=0x7fffffffe098) at ./main.c:38 #16 main (argc=<optimized out>, argv=<optimized out>) at ./main.c:64 (gdb) frame 3 #3 0x0000555555760a8a in rb_str_resize (str=str@entry=140737348585000, len=17) at string.c:3179 3179 SIZED_REALLOC_N(RSTRING(str)->as.heap.ptr, char, (gdb) p str $1 = 140737348585000 (gdb) p *str $2 = 8396805 (gdb) ``` ---------------------------------------- Bug #21655: segfault when building 3.3.10, regression from 3.3.9 https://bugs.ruby-lang.org/issues/21655#change-114964 * Author: kurly (Greg Kubaryk) * Status: Open * ruby -v: ruby 3.3.10 (2025-10-23 revision 343ea05002) [x86_64-linux] * Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- ref downstream bug https://bugs.gentoo.org/965095 - reporting upstream because I was able to reproduce the problem from ruby-3.3.10.tar.xz manually build log excerpt; the rest will be provided as an attachment gcc -O2 -pipe -march=amdfam10 -L. -fstack-protector-strong -rdynamic -Wl,-export-dynamic -fstack-protector-strong -pie main.o dmydln.o miniinit.o dmyext.o array.o ast.o bignum.o class.o compar.o compile.o complex.o cont.o debug.o debug_counter.o dir.o dln_find.o encoding.o enum.o enumerator.o error.o eval.o file.o gc.o hash.o inits.o io.o io_buffer.o iseq.o load.o marshal.o math.o memory_view.o rjit.o rjit_c.o node.o node_dump.o numeric.o object.o pack.o parse.o parser_st.o proc.o process.o ractor.o random.o range.o rational.o re.o regcomp.o regenc.o regerror.o regexec.o regparse.o regsyntax.o ruby.o ruby_parser.o scheduler.o shape.o signal.o sprintf.o st.o strftime.o string.o struct.o symbol.o thread.o time.o transcode.o util.o variable.o version.o vm.o vm_backtrace.o vm_dump.o vm_sync.o vm_trace.o weakmap.o prism/api_node.o prism/api_pack.o prism/diagnostic.o prism/encoding.o prism/extension.o prism/node.o prism/options.o prism/pack.o prism/prettyprint.o prism/regexp.o prism/serialize.o prism/token_type.o prism/util/pm_buffer.o prism/util/pm_char.o prism/util/pm_constant_pool.o prism/util/pm_list.o prism/util/pm_memchr.o prism/util/pm_newline_list.o prism/util/pm_state_stack.o prism/util/pm_string.o prism/util/pm_string_list.o prism/util/pm_strncasecmp.o prism/util/pm_strpbrk.o prism/prism.o prism_init.o yjit.o yjit/target/release/libyjit.o coroutine/amd64/Context.o enc/ascii.o enc/us_ascii.o enc/unicode.o enc/utf_8.o enc/trans/newline.o setproctitle.o addr2line.o -lz -lrt -lrt -lgmp -ldl -lcrypt -lm -lpthread -o miniruby : ./miniruby -I./lib -I. -I.ext/common ./tool/generic_erb.rb -o builtin_binary.inc \ ./template/builtin_binary.inc.tmpl make: *** [uncommon.mk:1316: builtin_binary.inc] Segmentation fault (core dumped) ---Files-------------------------------- buildlog (76.5 KB) -- https://bugs.ruby-lang.org/