ninja: Entering directory `out/gn'
[1/1003] ACTION //llvm/include/llvm/TargetParser:RISCVTargetParserDef(//llvm/utils/gn/build/toolchain:unix)
[2/543] ACTION //llvm/lib/Target/RISCV:RISCVGenMacroFusion(//llvm/utils/gn/build/toolchain:unix)
[3/542] ACTION //llvm/lib/Target/RISCV:RISCVGenMCPseudoLowering(//llvm/utils/gn/build/toolchain:unix)
[4/541] ACTION //llvm/lib/Target/RISCV:RISCVGenCompressInstEmitter(//llvm/utils/gn/build/toolchain:unix)
[5/540] ACTION //llvm/lib/Target/RISCV/MCTargetDesc:RISCVGenRegisterInfo(//llvm/utils/gn/build/toolchain:unix)
[6/539] ACTION //llvm/lib/Target/RISCV:RISCVGenRegisterBank(//llvm/utils/gn/build/toolchain:unix)
[7/538] ACTION //llvm/lib/Target/RISCV:RISCVGenO0PreLegalizeGICombiner(//llvm/utils/gn/build/toolchain:unix)
[8/537] ACTION //llvm/lib/Target/RISCV:RISCVGenPostLegalizeGICombiner(//llvm/utils/gn/build/toolchain:unix)
[9/536] ACTION //llvm/lib/Target/RISCV:RISCVGenPreLegalizeGICombiner(//llvm/utils/gn/build/toolchain:unix)
[10/535] ACTION //llvm/lib/Target/RISCV/MCTargetDesc:RISCVGenMCCodeEmitter(//llvm/utils/gn/build/toolchain:unix)
[11/534] ACTION //llvm/lib/Target/RISCV/Disassembler:RISCVGenDisassemblerTables(//llvm/utils/gn/build/toolchain:unix)
[12/533] ACTION //llvm/lib/Target/RISCV/MCTargetDesc:RISCVGenAsmWriter(//llvm/utils/gn/build/toolchain:unix)
[13/532] ACTION //llvm/lib/Target/RISCV/AsmParser:RISCVGenAsmMatcher(//llvm/utils/gn/build/toolchain:unix)
[14/531] ACTION //llvm/lib/Target/RISCV/MCTargetDesc:RISCVGenSearchableTables(//llvm/utils/gn/build/toolchain:unix)
[15/530] ACTION //llvm/lib/Target/RISCV:RISCVGenGlobalISel(//llvm/utils/gn/build/toolchain:unix)
[16/529] ACTION //llvm/lib/Target/RISCV/MCTargetDesc:RISCVGenInstrInfo(//llvm/utils/gn/build/toolchain:unix)
[17/528] ACTION //llvm/lib/Target/RISCV:RISCVGenDAGISel(//llvm/utils/gn/build/toolchain:unix)
[18/527] ACTION //llvm/lib/Target/RISCV/MCTargetDesc:RISCVGenSubtargetInfo(//llvm/utils/gn/build/toolchain:unix)
[19/30] AR stage2_unix/lib/libLLVMSupport.a
[20/30] AR stage2_unix/lib/libgtest.a
[21/30] LINK stage2_unix/obj/compiler-rt/lib/scudo/standalone/tests/ScudoCUnitTest
[22/30] LINK stage2_unix/obj/compiler-rt/lib/scudo/standalone/tests/ScudoCxxUnitTest
[23/30] LINK stage2_unix/obj/compiler-rt/lib/scudo/standalone/tests/ScudoHooksUnitTest
[24/30] LINK stage2_unix/obj/compiler-rt/lib/scudo/standalone/tests/ScudoUnitTest
[25/30] STAMP obj/compiler-rt/lib/scudo/scudo.stamp
[26/30] CXX stage2_unix/obj/libcxx/src/cxx_experimental.time_zone.o
FAILED: stage2_unix/obj/libcxx/src/cxx_experimental.time_zone.o 
./bin/clang++ -MMD -MF stage2_unix/obj/libcxx/src/cxx_experimental.time_zone.o.d -o stage2_unix/obj/libcxx/src/cxx_experimental.time_zone.o -c ../../libcxx/src/time_zone.cpp -D_LIBCPP_BUILDING_LIBRARY -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -DLIBCXX_BUILDING_LIBCXXABI -I../../llvm/include -Istage2_unix/gen/llvm/include -I../../libcxxabi/include -Iinclude/c++/v1 -O3 -fdiagnostics-color -Wall -Wextra -Wno-unused-parameter -Wdelete-non-virtual-dtor -Wstring-conversion -no-canonical-prefixes -Werror=date-time -fdebug-compilation-dir=. --sysroot=../../sysroot -Wpoison-system-directories -fPIC -Wcovered-switch-default -Wall -Wextra -W -Wwrite-strings -Wno-unused-parameter -Wno-long-long -Werror=return-type -Wextra-semi -Wno-user-defined-literals -Wno-covered-switch-default -std=c++17 -fvisibility-inlines-hidden -std=c++20 -nostdinc++
../../libcxx/src/time_zone.cpp:35:10: fatal error: 'expected' file not found
   35 | #include <expected>
      |          ^~~~~~~~~~
1 error generated.
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.