ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/261] ACTION //clang/tools/driver:clang-cpp(//llvm/utils/gn/build/toolchain:unix)
[2/261] ACTION //clang/tools/driver:clang-cl(//llvm/utils/gn/build/toolchain:unix)
[3/261] ACTION //clang/tools/driver:clangxx(//llvm/utils/gn/build/toolchain:unix)
[4/261] 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'
[5/261] ACTION //libcxx/src:cxx_symlink(//llvm/utils/gn/build/toolchain:stage2_unix)
[6/261] ACTION //llvm/include/llvm/Config:llvm-config(//llvm/utils/gn/build/toolchain:stage2_unix)
[7/216] ACTION //llvm/include/llvm/Config:abi-breaking(//llvm/utils/gn/build/toolchain:stage2_unix)
[8/102] ACTION //compiler-rt/test/builtins:builtins_mode_cfg(//llvm/utils/gn/build/toolchain:stage2_unix)
[9/102] ACTION //llvm/include/llvm/Config:TargetMCAs.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[10/102] ACTION //llvm/include/llvm/Config:TargetExegesis.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[11/102] ACTION //llvm/include/llvm/Config:AsmPrinters.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[12/102] ACTION //llvm/include/llvm/Config:Disassemblers.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[13/102] ACTION //compiler-rt/test/asan:lit_site_cfg(//llvm/utils/gn/build/toolchain:stage2_unix)
[14/102] ACTION //llvm/include/llvm/Support:write_extension_def(//llvm/utils/gn/build/toolchain:stage2_unix)
[15/102] ACTION //compiler-rt/test/lsan:asan_mode_cfg(//llvm/utils/gn/build/toolchain:stage2_unix)
[16/102] ACTION //llvm/include/llvm/Config:Targets(//llvm/utils/gn/build/toolchain:stage2_unix)
[17/102] ACTION //compiler-rt/test:lit_common_configured(//llvm/utils/gn/build/toolchain:stage2_unix)
[18/102] ACTION //llvm/include/llvm/Config:Targets.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[19/102] ACTION //compiler-rt/test/hwasan:lit_site_cfg(//llvm/utils/gn/build/toolchain:stage2_unix)
[20/102] ACTION //llvm/include/llvm/Support:write_vcsrevision(//llvm/utils/gn/build/toolchain:stage2_unix)
[21/102] ACTION //compiler-rt/lib/ubsan:ubsan_loop_detect_dynamic_list(//llvm/utils/gn/build/toolchain:stage2_unix)
[22/102] ACTION //llvm/include/llvm/Config:AsmParsers.def(//llvm/utils/gn/build/toolchain:stage2_unix)
[23/102] ACTION //compiler-rt/lib/ubsan:ubsan_static_cxx_dynamic_list(//llvm/utils/gn/build/toolchain:stage2_unix)
[24/102] ACTION //compiler-rt/lib/ubsan:ubsan_static_dynamic_list(//llvm/utils/gn/build/toolchain:stage2_unix)
[25/102] ACTION //compiler-rt/lib/ubsan:version_script(//llvm/utils/gn/build/toolchain:stage2_unix)
[26/102] ACTION //compiler-rt/lib/hwasan:version_script(//llvm/utils/gn/build/toolchain:stage2_unix)
[27/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.fuchsia.o
[28/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.mem_map_fuchsia.o
[29/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.common.o
[30/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.release.o
[31/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.flags.o
[32/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.mem_map.o
[33/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.condition_variable_linux.o
[34/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.flags_parser.o
[35/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.report_linux.o
[36/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.checksum.o
[37/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.timing.o
[38/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.linux.o
[39/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.mem_map_linux.o
[40/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.string_utils.o
[41/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/sources.report.o
[42/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/cxx_wrapper_sources.wrappers_cpp.o
[43/102] CXX stage2_unix/obj/compiler-rt/lib/scudo/standalone/c_wrapper_sources.wrappers_c.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.