Build failure. Verbose build follows.
+ echo 'Build failure. Verbose build follows.'
+ make all install V=1
[  0%] Built target secp256k1_precomputed
[  1%] Built target secp256k1
[  1%] Generating obj/build.h
[  1%] Built target generate_build_info
[  2%] Built target bitcoin_clientversion
[  2%] Built target bitcoin_crypto_x86_shani
[  3%] Built target bitcoin_crypto_sse41
[  3%] Built target bitcoin_crypto_avx2
[  5%] Built target bitcoin_crypto
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[ 11%] Built target bitcoin_util
[ 16%] Built target bitcoin_common
[ 19%] Built target bitcoin_wallet
[ 19%] Built target bitcoin-wallet
[ 20%] Built target crc32c_sse42
[ 20%] Built target crc32c
[ 25%] Built target leveldb
[ 26%] Built target minisketch_clmul
[ 27%] Built target minisketch
[ 28%] Built target bitcoin_zmq
[ 38%] Built target bitcoin_node
[ 38%] Built target bitcoind
[ 38%] Built target bitcoin_cli
[ 39%] Built target bitcoin-cli
[ 39%] Built target bitcoin-tx
[ 40%] Built target bitcoin-util
[ 40%] Built target unitester
[ 40%] Built target object
[ 40%] Built target noverify_tests
[ 41%] Built target tests
[ 41%] Built target exhaustive_tests
[ 41%] Built target bitcoinqt_autogen_timestamp_deps
[ 41%] Built target bitcoinqt_autogen
[ 62%] Built target bitcoinqt
[ 62%] Built target bitcoin-qt_autogen_timestamp_deps
[ 62%] Built target bitcoin-qt_autogen
[ 62%] Built target bitcoin-qt
[ 63%] Built target test_util
[ 63%] Built target test_bitcoin-qt_autogen_timestamp_deps
[ 63%] Built target test_bitcoin-qt_autogen
[ 64%] Built target test_bitcoin-qt
[ 69%] Built target bench_bitcoin
[ 69%] Building CXX object src/test/CMakeFiles/test_bitcoin.dir/feefrac_tests.cpp.o
/ci_container_base/src/test/feefrac_tests.cpp:18:13: error: unused variable 'zero_fee' [-Werror,-Wunused-variable]
   18 |     FeeFrac zero_fee{0, 1}; // zero-fee allowed
      |             ^~~~~~~~
1 error generated.
make[2]: *** [src/test/CMakeFiles/test_bitcoin.dir/build.make:602: src/test/CMakeFiles/test_bitcoin.dir/feefrac_tests.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:2669: src/test/CMakeFiles/test_bitcoin.dir/all] Error 2
make: *** [Makefile:146: all] Error 2

Exit status: 2