ninja: Entering directory `out/gn'
[1/25] CXX stage2_unix/obj/compiler-rt/lib/ubsan/standalone_sources.ubsan_diag_standalone.o
[2/25] CXX stage2_unix/obj/compiler-rt/lib/ubsan/sources.ubsan_init.o
[3/25] CXX stage2_unix/obj/compiler-rt/lib/sanitizer_common/sources.sanitizer_symbolizer_libcdep.o
FAILED: stage2_unix/obj/compiler-rt/lib/sanitizer_common/sources.sanitizer_symbolizer_libcdep.o 
./bin/clang++ -MMD -MF stage2_unix/obj/compiler-rt/lib/sanitizer_common/sources.sanitizer_symbolizer_libcdep.o.d -o stage2_unix/obj/compiler-rt/lib/sanitizer_common/sources.sanitizer_symbolizer_libcdep.o -c ../../compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp  -I../../compiler-rt/lib -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 -Wcovered-switch-default -fno-builtin -gline-tables-only -fPIC -funwind-tables -fvisibility=hidden -Werror=thread-safety -Werror=thread-safety-reference -Werror=thread-safety-beta -std=c++17 -fvisibility-inlines-hidden -fno-exceptions -fno-rtti
../../compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp:36:18: error: reading variable 'tools_' requires holding mutex 'symbolizer_->mu_' [-Werror,-Wthread-safety-analysis]
   36 |     symbolizer_->tools_.clear();
      |                  ^
1 error generated.
[4/25] CXX stage2_unix/obj/compiler-rt/lib/ubsan/sources.ubsan_monitor.o
[5/25] CXX stage2_unix/obj/compiler-rt/lib/ubsan/cxx_sources.ubsan_handlers_cxx.o
[6/25] CXX stage2_unix/obj/compiler-rt/lib/tsan/rtl/rtl.tsan_platform_posix.o
[7/25] CXX stage2_unix/obj/compiler-rt/lib/ubsan/sources.ubsan_diag.o
[8/25] CXX stage2_unix/obj/compiler-rt/lib/tsan/rtl/rtl.tsan_platform_linux.o
[9/25] CXX stage2_unix/obj/compiler-rt/lib/ubsan/sources.ubsan_handlers.o
[10/25] CXX stage2_unix/obj/compiler-rt/lib/tsan/rtl/rtl.tsan_sync.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.