ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/275] ACTION //clang/tools/driver:clangxx(//llvm/utils/gn/build/toolchain:unix)
[2/275] ACTION //lld/tools/lld:lld-link(//llvm/utils/gn/build/toolchain:unix)
[3/275] ACTION //llvm/tools/llvm-ar:llvm-ranlib(//llvm/utils/gn/build/toolchain:unix)
[4/275] ACTION //lld/tools/lld:wasm-ld(//llvm/utils/gn/build/toolchain:unix)
[5/275] ACTION //clang/tools/driver:clang-cl(//llvm/utils/gn/build/toolchain:unix)
[6/275] ACTION //llvm/tools/llvm-ar:llvm-dlltool(//llvm/utils/gn/build/toolchain:unix)
[7/275] ACTION //clang/tools/driver:clang-cpp(//llvm/utils/gn/build/toolchain:unix)
[8/275] ACTION //llvm/tools/llvm-ar:llvm-lib(//llvm/utils/gn/build/toolchain:unix)
[9/275] ACTION //lld/tools/lld:ld64.lld(//llvm/utils/gn/build/toolchain:unix)
[10/275] ACTION //lld/tools/lld:ld.lld(//llvm/utils/gn/build/toolchain:unix)
[11/275] ACTION //llvm/utils/llvm-lit:llvm-lit(//llvm/utils/gn/build/toolchain:unix)
FAILED: bin/llvm-lit 
python3 ../../llvm/utils/gn/build/write_cmake_config.py -o bin/llvm-lit ../../llvm/utils/llvm-lit/llvm-lit.in LLVM_SOURCE_DIR=../../../llvm Python3_EXECUTABLE=/usr/bin/env\ python3 BUILD_MODE=. LLVM_LIT_CONFIG_MAP=\#\ Takes\ a\ path\ that\'s\ relative\ to\ __file__\ and\ makes\ it\ absolute.\\ndef\ path\(p\):\\n\ \ \ \ return\ os.path.abspath\(os.path.join\(__file__,\ \'..\',\ p\)\)\ if\ p\ else\ \'\'\\n\\nmap_config\(\\n\ \ \ \ path\(r\'../../../bolt/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/bolt/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../bolt/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/bolt/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang-tools-extra/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang-tools-extra/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang-tools-extra/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang-tools-extra/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang-tools-extra/clangd/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang-tools-extra/clangd/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang-tools-extra/clangd/unittests/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang-tools-extra/clangd/unittests/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lld/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lld/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lld/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lld/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lldb/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lldb/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lldb/test/API/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lldb/test/API/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lldb/test/Shell/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lldb/test/Shell/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lldb/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lldb/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../llvm/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/llvm/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../llvm/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/llvm/test/Unit/lit.site.cfg.py\'\)\)
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: 'LLVM_WINDOWS_PREFER_FORWARD_SLASH'
[12/275] ACTION //compiler-rt/test/lsan:asan_mode_cfg(//llvm/utils/gn/build/toolchain:stage2_unix)
[13/275] ACTION //compiler-rt/test/builtins:builtins_mode_cfg(//llvm/utils/gn/build/toolchain:stage2_unix)
[14/275] ACTION //compiler-rt/test:lit_common_configured(//llvm/utils/gn/build/toolchain:stage2_unix)
[15/275] ACTION //compiler-rt/test/hwasan:lit_site_cfg(//llvm/utils/gn/build/toolchain:stage2_unix)
[16/275] ACTION //llvm/include/llvm/Config:Disassemblers.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[17/275] ACTION //compiler-rt/test/asan:lit_site_cfg(//llvm/utils/gn/build/toolchain:stage2_unix)
[18/275] ACTION //llvm/include/llvm/Config:AsmParsers.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[19/275] ACTION //llvm/include/llvm/Support:write_vcsrevision(//llvm/utils/gn/build/toolchain:stage2_unix)
[20/275] ACTION //llvm/include/llvm/Config:Targets.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[21/275] ACTION //llvm/include/llvm/Config:TargetMCAs.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[22/275] ACTION //llvm/include/llvm/Config:Targets(//llvm/utils/gn/build/toolchain:stage2_unix)
[23/275] ACTION //llvm/include/llvm/Config:TargetExegesis.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[24/275] ACTION //llvm/include/llvm/Config:abi-breaking(//llvm/utils/gn/build/toolchain:stage2_unix)
[25/275] ACTION //llvm/include/llvm/Config:AsmPrinters.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[26/275] ACTION //llvm/include/llvm/Config:llvm-config(//llvm/utils/gn/build/toolchain:stage2_unix)
[27/94] ACTION //llvm/include/llvm/Support:write_extension_def(//llvm/utils/gn/build/toolchain:stage2_unix)
[28/94] AR lib/libc++experimental.a
[29/94] AR lib/libc++abi.a
[30/94] ACTION //compiler-rt/lib/ubsan:ubsan_loop_detect_dynamic_list(//llvm/utils/gn/build/toolchain:stage2_unix)
[31/94] ACTION //compiler-rt/lib/ubsan:ubsan_static_cxx_dynamic_list(//llvm/utils/gn/build/toolchain:stage2_unix)
[32/94] ACTION //compiler-rt/lib/ubsan:ubsan_static_dynamic_list(//llvm/utils/gn/build/toolchain:stage2_unix)
[33/94] ACTION //compiler-rt/lib/ubsan:version_script(//llvm/utils/gn/build/toolchain:stage2_unix)
[34/94] ACTION //compiler-rt/lib/hwasan:version_script(//llvm/utils/gn/build/toolchain:stage2_unix)
[35/94] CXX stage2_unix/obj/libcxx/src/cxx_static.optional.o
[36/94] CXX stage2_unix/obj/libcxx/src/cxx_static.stdexcept.o
[37/94] CXX stage2_unix/obj/libcxx/src/cxx_static.system_error.o
[38/94] CXX stage2_unix/obj/libcxx/src/cxx_static.vector.o
[39/94] CXX stage2_unix/obj/libcxx/src/filesystem/cxx_static.filesystem_error.o
[40/94] CXX stage2_unix/obj/libcxx/src/cxx_static.random.o
[41/94] CXX stage2_unix/obj/libcxx/src/cxx_static.random_shuffle.o
[42/94] CXX stage2_unix/obj/libcxx/src/cxx_static.strstream.o
[43/94] CXX stage2_unix/obj/libcxx/src/cxx_static.thread.o
[44/94] CXX stage2_unix/obj/libcxx/src/cxx_static.regex.o
[45/94] CXX stage2_unix/obj/libcxx/src/filesystem/cxx_static.path.o
[46/94] CXX stage2_unix/obj/libcxx/src/cxx_static.print.o
[47/94] CXX stage2_unix/obj/libcxx/src/cxx_static.ostream.o
[48/94] CXX stage2_unix/obj/libcxx/src/cxx_static.string.o
[49/94] CXX stage2_unix/obj/libcxx/src/filesystem/cxx_static.filesystem_clock.o
[50/94] CXX stage2_unix/obj/libcxx/src/filesystem/cxx_static.directory_entry.o
[51/94] CXX stage2_unix/obj/libcxx/src/filesystem/cxx_static.directory_iterator.o
[52/94] CXX stage2_unix/obj/libcxx/src/filesystem/cxx_static.operations.o
[53/94] CXX stage2_unix/obj/libcxxabi/src/cxxabi_shared.cxa_demangle.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.