>>333
3回目。> sudo systemctl stop systemd-oomd
これをやって、~/.cache/bazel を削除。
メモリ16GBで再再ビルド。
エラーが前回に戻ったかな↓

/usr/lib/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/bits/basic_string.h:1182:30: error: '*(const std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)((char*)<unknown> + 8).std::__cxx11::basic_string<char>::<anonymous>.std::__cxx11::basic_string<char>::<unnamed union>::_M_allocated_capacity' may be used uninitialized [-Werror=maybe-uninitialized]
1182 | return _M_is_local() ? size_type(_S_local_capacity)
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1183 | : _M_allocated_capacity;
| ~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
Use --verbose_failures to see the command lines of failed build steps.
ERROR: /home/yamato99999/aur/mozc-ut/src/mozc-ut-git/src/protocol/BUILD.bazel:140:14 Compiling protocol/user_dictionary_storage.pb.cc failed: (Exit 1): gcc failed: error executing CppCompile command (from target @@com_google_protobuf//src/google/protobuf:protobuf) /usr/bin/gcc -U_FORTIFY_SOURCE -fstack-protector -Wall -Wunused-but-set-parameter -Wno-free-nonheap-object -fno-omit-frame-pointer -g0 -O2 '-D_FORTIFY_SOURCE=1' -DNDEBUG -ffunction-sections ... (remaining 62 arguments skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
INFO: Elapsed time: 218.061s, Critical Path: 11.59s
INFO: 833 processes: 403 internal, 430 linux-sandbox.
ERROR: Build did NOT complete successfully
==> エラー: build() で問題が発生しました。
中止...

こんな感じでメモリ16GBでも失敗する。
自分のPCがおかしいおま環？
とも疑う。
とりあえずmozc-utビルド、こんな感じで
失敗します。報告でした。