Issue #21167 has been updated by nobu (Nobuyoshi Nakada). I think it is a bug in VC 19.43.34808 for x64. This is the code compiled `heap_idx_for_size` with VC 19.43.34808 for x64 ```asm mov r8d, 63 ; 0000003fH sub r8d, DWORD PTR r$2[rsp] lea rcx, QWORD PTR [r10+39] mul rcx shr rdx, 5 lea rax, QWORD PTR [rdx-1] bsr rcx, rax mov DWORD PTR r$2[rsp], ecx mov ecx, 64 ; 00000040H mov eax, ecx cmovne eax, r8d ``` If `bsr` reset the zero flag, `cmovne` at the end copies `r8d` which is calculated prior to `bsr`, (probably to reduce use of intermediate registers). However `r8d` is calculated from `r$2[rsp]` which should be the result of `bsr` and has not been set at the time of that calculation. ---------------------------------------- Bug #21167: Visual Studio 2022 17.13.x couldn't build ruby.exe https://bugs.ruby-lang.org/issues/21167#change-112165 * Author: hsbt (Hiroshi SHIBATA) * Status: Open * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- `miniruby.exe` built by Visual Studio 2022 17.13.0-2 is not working with our build process. ``` user32.lib advapi32.lib shell32.lib ws2_32.lib iphlpapi.lib gmp.lib imagehlp.lib shlwapi.lib bcrypt.lib linking miniruby.exe Creating library miniruby.lib and object miniruby.exp [BUG] heap_idx_for_size: allocation size too large (size=56u, heap_idx=891288545u) ruby 3.5.0dev (2025-03-03T02:17:14Z master a47e686cb6) [x64-mswin64_140] -- Control frame information ----------------------------------------------- c:0001 p:---- s:0003 e:000002 DUMMY [FINISH] -- Threading information --------------------------------------------------- Total ractor count: 0 Ruby thread count for this ractor: 0 -- C level backtrace information ------------------------------------------- C:\WINDOWS\SYSTEM32\ntdll.dll(ZwWaitForSingleObject+0x14) [0x00007FF9057BF854] C:\WINDOWS\System32\KERNELBASE.dll(WaitForSingleObjectEx+0xaf) [0x00007FF902CFCE1F] C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(rb_print_backtrace+0x3e) [0x00007FF63DC37E7E] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\vm_dump.c:859 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(rb_vm_bugreport+0x1ba) [0x00007FF63DC3803E] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\vm_dump.c:1170 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(rb_bug_without_die_internal+0x72) [0x00007FF63DB0255A] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\error.c:1097 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(rb_bug+0x20) [0x00007FF63DB02448] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\error.c:1117 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(newobj_of+0x1e7) [0x00007FF63DB186FB] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\gc.c:1007 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(typed_data_alloc+0xc3) [0x00007FF63DB212CF] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\gc.c:1084 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(rb_data_typed_object_zalloc+0x3b) [0x00007FF63DB19797] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\gc.c:1107 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(pin_array_list_new+0x25) [0x00007FF63DC1B5D9] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\vm.c:4387 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(Init_vm_objects+0x17) [0x00007FF63DC1665B] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\vm.c:4446 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(ruby_setup+0x3f) [0x00007FF63DB08C1B] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\eval.c:83 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(ruby_init+0x9) [0x00007FF63DB089AD] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\eval.c:98 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(wmain+0x3a) [0x00007FF63DA8103A] C:\Users\hsbt\DevDrive\github.com\ruby\ruby\main.c:51 C:\Users\hsbt\DevDrive\github.com\ruby\ruby.build\2022\miniruby.exe(__scrt_common_main_seh+0x10c) [0x00007FF63DC9DE88] D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288 C:\WINDOWS\System32\KERNEL32.DLL(BaseThreadInitThunk+0x17) [0x00007FF90409E8D7] -- Other runtime information ----------------------------------------------- NMAKE : fatal error U1077: '@ miniruby.exe -v' : return code '0x3' Stop. ``` I disabled that version on our CI temporary. * https://github.com/ruby/ruby/pull/12830 * https://github.com/ruby/actions/pull/81 -- https://bugs.ruby-lang.org/