Build failure when setting optimized tablegen

[R-Goc]

When setting optimized tablegen: -DLLVM_OPTIMIZED_TABLEGEN=ON my build fails with this output:

FAILED: include/llvm/TargetParser/ARMTargetParserDef.inc D:/lib/llvm-dev/build/include/llvm/TargetParser/ARMTargetParserDef.inc
C:\Windows\system32\cmd.exe /C "cd /D D:\lib\llvm-dev\build && D:\lib\llvm-dev\build\NATIVE\bin\llvm-min-tblgen.exe -gen-arm-target-def -I D:/lib/llvm-dev/llvm/lib/Target/ARM/ -I D:/lib/llvm-dev/llvm/include/llvm/TargetParser -ID:/lib/llvm-dev/build/include -ID:/lib/llvm-dev/llvm/include D:/lib/llvm-dev/llvm/lib/Target/ARM/ARM.td --write-if-changed -o include/llvm/TargetParser/ARMTargetParserDef.inc -d include/llvm/TargetParser/ARMTargetParserDef.inc.d"

All tablegen jobs tried fail with no output, and %errorlevel% is -1073741819 when they are ran separately. I'm on a windows system building with clang-cl 19.1.6. Full build command:

cmake -B build -GNinja -Sllvm -Wno-dev -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_ENABLE_RUNTIMES="compiler-rt;libcxx" -DCMAKE_BUILD_TYPE=Debug -DLLVM_PARALLEL_LINK_JOBS=3 -DLLVM_PARALLEL_COMPILE_JOBS=16 -DLLVM_TARGETS_TO_BUILD="X86" -DLLVM_ENABLE_RTTI=ON -DLLVM_ENABLE_EH=ON -DCMAKE_CXX_COMPILER=clang-cl.exe -DCMAKE_ASM_COMPILER=clang-cl.exe -DCMAKE_C_COMPILER=clang-cl.exe -DLLVM_ENABLE_LLD=ON -DCMAKE_C_COMPILER_LAUNCHER=sccache -DCMAKE_CXX_COMPILER_LAUNCHER=sccache -DCMAKE_EXPORT_COMPILE_COMMANDS=ON  -DLLVM_OPTIMIZED_TABLEGEN=ON