ninja: Entering directory `out/gn'
[1/5947] CXX obj/llvm/lib/Support/Support.Z3Solver.o
[2/5947] CXX obj/llvm/lib/Support/Support.ScaledNumber.o
[3/5947] CXX obj/llvm/lib/Support/Support.APFloat.o
FAILED: obj/llvm/lib/Support/Support.APFloat.o 
../../chromeclang/bin/clang++ -MMD -MF obj/llvm/lib/Support/Support.APFloat.o.d -o obj/llvm/lib/Support/Support.APFloat.o -c ../../llvm/lib/Support/APFloat.cpp  -I../../llvm/lib/Support/Unix -I../../llvm/lib/Support/Windows -I../../third-party/siphash/include -I../../llvm/include -Igen/llvm/include -arch arm64 -isysroot ../../sysroot/MacOSX.sdk -mmacos-version-min=12 -mmacos-version-min=12 -O3 -fdiagnostics-color -Wall -Wextra -Wno-unused-parameter -Wdelete-non-virtual-dtor -Wstring-conversion -no-canonical-prefixes -Werror=date-time -isysroot ../../sysroot/MacOSX.sdk -Wpoison-system-directories -fPIC -Wcovered-switch-default -std=c++17 -fvisibility-inlines-hidden -fno-exceptions -fno-rtti
../../llvm/lib/Support/APFloat.cpp:5627:29: error: use of undeclared identifier 'Parts'
    assert(DstPartsCount <= Parts.size() && "Integer too big");
                            ^
1 error generated.
[4/5947] CXX obj/llvm/lib/Support/Support.APFixedPoint.o
[5/5947] CXX obj/llvm/lib/Support/Support.StringRef.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.