Diagnosed failure

EchoSubprocessTest.TestSubprocessMetricsOnError: Unrecognized error type. Please see the error log for more information.

Full log

[==========] Running 3 tests from 1 test suite.
[----------] Global test environment set-up.
[----------] 3 tests from EchoSubprocessTest
[ RUN      ] EchoSubprocessTest.TestBasicSubprocessMetrics
WARNING: Logging before InitGoogleLogging() is written to STDERR
I20260806 23:49:53.936834  4303 server.cc:273] Received an EOF from the subprocess
W20260806 23:49:53.938181  4280 server.cc:408] The subprocess has exited with status 143
I20260806 23:49:54.658886  4297 server.cc:366] get failed, inbound queue shut down: Aborted: 
I20260806 23:49:54.659061  4304 server.cc:440] outbound queue shut down: Aborted: 
I20260806 23:49:54.659061  4298 server.cc:366] get failed, inbound queue shut down: Aborted: 
I20260806 23:49:54.659308  4299 server.cc:366] get failed, inbound queue shut down: Aborted: 
[       OK ] EchoSubprocessTest.TestBasicSubprocessMetrics (3004 ms)
[ RUN      ] EchoSubprocessTest.TestSubprocessMetricsOnError
I20260806 23:49:55.404551  4354 server.cc:273] Received an EOF from the subprocess
W20260806 23:49:55.404927  4322 server.cc:408] The subprocess has exited with status 9
I20260806 23:49:55.410740  4345 server.cc:366] get failed, inbound queue shut down: Aborted: 
I20260806 23:49:55.410876  4347 server.cc:366] get failed, inbound queue shut down: Aborted: 
I20260806 23:49:55.410740  4360 server.cc:440] outbound queue shut down: Aborted: 
I20260806 23:49:55.410880  4346 server.cc:366] get failed, inbound queue shut down: Aborted: 
I20260806 23:49:59.136063  4390 server.cc:273] Received an EOF from the subprocess
I20260806 23:49:59.136349  4385 server.cc:366] get failed, inbound queue shut down: Aborted: 
I20260806 23:49:59.136375  4384 server.cc:366] get failed, inbound queue shut down: Aborted: 
F20260806 23:49:59.136253  4368 server.cc:401] Check failed: _s.ok() Bad status: Runtime error: Unable to wait on child: No child processes (error 10)
*** Check failure stack trace: ***
I20260806 23:49:59.137080  4387 server.cc:366] get failed, inbound queue shut down: Aborted: 
*** Aborted at 1786060199 (unix time) try "date -d @1786060199" if you are using GNU date ***
I20260806 23:49:59.137112  4391 server.cc:440] outbound queue shut down: Aborted: 
PC: @                0x0 (unknown)
*** SIGABRT (@0x3e8000010ad) received by PID 4269 (TID 0x7f2ff4bff700) from PID 4269; stack trace: ***
    @           0x278720 __tsan::CallUserSignalHandler() at /data0/somelongdirectorytoavoidrpathissues/src/kudu/thirdparty/src/llvm-11.0.0.src/projects/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp:1915
    @           0x27ae10 rtl_sigaction() at /data0/somelongdirectorytoavoidrpathissues/src/kudu/thirdparty/src/llvm-11.0.0.src/projects/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp:2005
    @     0x7f2ffb5a3980 (unknown) at ??:0
    @     0x7f2ffafc4e87 gsignal at ??:0
    @     0x7f2ffafc67f1 abort at ??:0
    @           0x27cb67 __interceptor_abort at /data0/somelongdirectorytoavoidrpathissues/src/kudu/thirdparty/src/llvm-11.0.0.src/projects/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp:263
    @     0x7f2ffde19df4 google::LogMessage::SendToLog() at ??:0
    @     0x7f2ffde1a9a0 google::LogMessage::Flush() at ??:0
    @     0x7f2ffde1fadb google::LogMessageFatal::~LogMessageFatal() at ??:0
    @     0x7f2fff24e19d kudu::subprocess::SubprocessServer::ExitCheckerThread() at ??:0
    @     0x7f2fff250912 kudu::subprocess::SubprocessServer::Init()::$_1::operator()() at ??:0
    @     0x7f2fff2508ca _ZNSt3__18__invokeIRZN4kudu10subprocess16SubprocessServer4InitEvE3$_1JEEEDTclclsr3std3__1E7forwardIT_Efp_Espclsr3std3__1E7forwardIT0_Efp0_EEEOS6_DpOS7_ at ??:0
    @     0x7f2fff25085a std::__1::__invoke_void_return_wrapper<>::__call<>() at ??:0
    @     0x7f2fff250822 std::__1::__function::__alloc_func<>::operator()() at ??:0
    @     0x7f2fff24fb1e std::__1::__function::__func<>::operator()() at ??:0
    @     0x7f2fff2bdf35 std::__1::__function::__value_func<>::operator()() at ??:0
    @     0x7f2fff2b09da std::__1::function<>::operator()() at ??:0
    @     0x7f2ffe767dc7 kudu::Thread::SuperviseThread() at ??:0
    @           0x278de0 __tsan_thread_start_func at /data0/somelongdirectorytoavoidrpathissues/src/kudu/thirdparty/src/llvm-11.0.0.src/projects/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp:959
    @     0x7f2ffb5986db start_thread at ??:0
    @     0x7f2ffb0a761f clone at ??:0