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From github.com:llvm/llvm-project
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   326d4e90335c..21502bddb37a  main       -> origin/main
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HEAD is now at 21502bddb37a [lldb] Drop support for the Buffer Protocol (#168144)
INFO:2025-11-15T00:14:31Z:root:syncing...
Deleted branch merge (was 326d4e90335c).
Switched to a new branch 'merge'
branch 'merge' set up to track 'origin/main'.
INFO:2025-11-15T00:14:31Z:root:building
ninja: Entering directory `out/gn'
[1/4617] ACTION //libcxx/include:write_config_site(//llvm/utils/gn/build/toolchain:unix)
FAILED: include/c++/v1/__config_site 
python3 ../../llvm/utils/gn/build/write_cmake_config.py -o include/c++/v1/__config_site ../../libcxx/include/__config_site.in _LIBCPP_ABI_FORCE_ITANIUM= _LIBCPP_ABI_FORCE_MICROSOFT= _LIBCPP_ABI_VERSION=1 _LIBCPP_EXTRA_SITE_DEFINES= _LIBCPP_HAS_FILESYSTEM=1 _LIBCPP_HAS_THREADS=1 _LIBCPP_HAS_MONOTONIC_CLOCK=1 _LIBCPP_HAS_MUSL_LIBC= _LIBCPP_HAS_THREAD_API_PTHREAD= _LIBCPP_HAS_THREAD_API_EXTERNAL= _LIBCPP_HAS_THREAD_API_WIN32= _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS= _LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS= _LIBCPP_NO_VCRUNTIME= _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION= _LIBCPP_HAS_RANDOM_DEVICE=1 _LIBCPP_HAS_LOCALIZATION=1 _LIBCPP_HAS_UNICODE=1 _LIBCPP_HAS_WIDE_CHARACTERS=1 _LIBCPP_HAS_TERMINAL=1 _LIBCPP_INSTRUMENTED_WITH_ASAN= _LIBCPP_ABI_DEFINES= _LIBCPP_HARDENING_MODE_DEFAULT=_LIBCPP_HARDENING_MODE_NONE _LIBCPP_PSTL_BACKEND_LIBDISPATCH= _LIBCPP_PSTL_BACKEND_SERIAL= _LIBCPP_PSTL_BACKEND_STD_THREAD=1 _LIBCPP_ABI_NAMESPACE=__1 _LIBCPP_HAS_TIME_ZONE_DATABASE=1
Traceback (most recent call last):
  File "/usr/local/google/home/thakis/src/llvm-project/out/gn/../../llvm/utils/gn/build/write_cmake_config.py", line 122, in <module>
    sys.exit(main())
             ~~~~^^
  File "/usr/local/google/home/thakis/src/llvm-project/out/gn/../../llvm/utils/gn/build/write_cmake_config.py", line 72, in main
    in_line = var_re.sub(repl, in_line)
  File "/usr/local/google/home/thakis/src/llvm-project/out/gn/../../llvm/utils/gn/build/write_cmake_config.py", line 70, in repl
    return values[key]
           ~~~~~~^^^^^
KeyError: '_LIBCPP_ASSERTION_SEMANTIC_DEFAULT'
[2/4617] CXX obj/llvm/lib/Target/Target.RegisterTargetPassConfigCallback.o
[3/4617] CXX obj/llvm/lib/IR/IR.RuntimeLibcalls.o
[4/4617] CXX obj/llvm/lib/Target/Target.Target.o
[5/4617] CXX obj/llvm/lib/ExecutionEngine/ExecutionEngine.TargetSelect.o
[6/4617] CXX obj/llvm/lib/ExecutionEngine/ExecutionEngine.ExecutionEngineBindings.o
[7/4617] CXX obj/llvm/lib/Transforms/CFGuard/CFGuard.CFGuard.o
[8/4617] CXX obj/llvm/lib/Object/Object.IRSymtab.o
[9/4617] CXX obj/llvm/lib/Target/Target.TargetLoweringObjectFile.o
[10/4617] CXX obj/llvm/lib/Transforms/Coroutines/Coroutines.CoroConditionalWrapper.o
[11/4617] CXX obj/llvm/lib/Transforms/AggressiveInstCombine/AggressiveInstCombine.TruncInstCombine.o
[12/4617] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CSEInfo.o
[13/4617] CXX obj/llvm/lib/ExecutionEngine/Interpreter/Interpreter.Interpreter.o
[14/4617] CXX obj/llvm/lib/Transforms/Coroutines/Coroutines.CoroCleanup.o
[15/4617] CXX obj/llvm/lib/DebugInfo/DWARF/DWARF.DWARFUnit.o
[16/4617] CXX obj/llvm/lib/Transforms/Coroutines/Coroutines.CoroAnnotationElide.o
[17/4617] CXX obj/llvm/lib/Frontend/Driver/Driver.CodeGenOptions.o
[18/4617] CXX obj/llvm/lib/Target/Target.TargetMachineC.o
[19/4617] CXX obj/llvm/lib/ExecutionEngine/MCJIT/MCJIT.MCJIT.o
[20/4617] CXX obj/llvm/lib/Transforms/HipStdPar/HipStdPar.HipStdPar.o
[21/4617] CXX obj/llvm/lib/Transforms/IPO/IPO.AlwaysInliner.o
[22/4617] CXX obj/llvm/lib/Transforms/Coroutines/Coroutines.CoroEarly.o
[23/4617] CXX obj/llvm/lib/ExecutionEngine/Interpreter/Interpreter.ExternalFunctions.o
[24/4617] CXX obj/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.WinCFGuard.o
[25/4617] CXX obj/llvm/lib/Target/Target.TargetMachine.o
[26/4617] CXX obj/llvm/lib/LTO/LTO.UpdateCompilerUsed.o
[27/4617] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelperArtifacts.o
[28/4617] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CSEMIRBuilder.o
[29/4617] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelperCompares.o
[30/4617] CXX obj/llvm/lib/ExecutionEngine/ExecutionEngine.ExecutionEngine.o
[31/4617] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelperCasts.o
[32/4617] CXX obj/llvm/lib/Transforms/Coroutines/Coroutines.CoroElide.o
[33/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.AcceleratorRecordsSaver.o
[34/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.OutputSections.o
[35/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.DependencyTracker.o
[36/4617] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.Combiner.o
[37/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.SyntheticTypeNameBuilder.o
[38/4617] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CallLowering.o
[39/4617] CXX obj/llvm/lib/ExecutionEngine/Interpreter/Interpreter.Execution.o
[40/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.DWARFLinker.o
[41/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.DIEAttributeCloner.o
[42/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.DWARFLinkerTypeUnit.o
[43/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.DWARFEmitterImpl.o
[44/4617] CXX obj/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.WinException.o
[45/4617] CXX obj/llvm/lib/FuzzMutate/FuzzMutate.IRMutator.o
[46/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.DWARFLinkerUnit.o
[47/4617] CXX obj/llvm/lib/Transforms/IPO/IPO.ArgumentPromotion.o
[48/4617] CXX obj/llvm/lib/Transforms/AggressiveInstCombine/AggressiveInstCombine.AggressiveInstCombine.o
[49/4617] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.StatepointLowering.o
[50/4617] CXX obj/llvm/lib/Passes/Passes.PassBuilderBindings.o
[51/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.DWARFLinkerCompileUnit.o
[52/4617] CXX obj/llvm/lib/Passes/Passes.CodeGenPassBuilder.o
[53/4617] CXX obj/llvm/lib/Transforms/Coroutines/Coroutines.CoroFrame.o
[54/4617] CXX obj/llvm/lib/LTO/LTO.LTOModule.o
[55/4617] CXX obj/llvm/lib/LTO/LTO.LTOCodeGenerator.o
[56/4617] CXX obj/llvm/lib/DWARFLinker/Parallel/Parallel.DWARFLinkerImpl.o
[57/4617] CXX obj/llvm/lib/DWARFLinker/Classic/Classic.DWARFLinker.o
[58/4617] CXX obj/llvm/lib/LTO/LTO.LTOBackend.o
[59/4617] CXX obj/llvm/lib/LTO/LTO.ThinLTOCodeGenerator.o
[60/4617] CXX obj/llvm/lib/Passes/Passes.StandardInstrumentations.o
[61/4617] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.TargetLowering.o
[62/4617] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelper.o
[63/4617] CXX obj/llvm/lib/LTO/LTO.LTO.o
[64/4617] CXX obj/llvm/lib/Frontend/OpenMP/OpenMP.OMPIRBuilder.o
[65/4617] CXX obj/llvm/lib/Passes/Passes.PassBuilderPipelines.o
[66/4617] CXX obj/llvm/lib/Passes/Passes.PassBuilder.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.