Reproduce steps: 1. git clone -c core.autocrlf=true https://github.com/mongodb/mongo D:\MongoDB\src 2. Open a VS 2017 x64 command prompt and browse to D:\MongoDB\src 3. pip.exe install --user -r .\etc\pip\dev-requirements.txt 4. python.exe buildscripts/scons.py all -j4 5. python.exe buildscripts/resmoke.py --suites=unittests --jobs=1 6. python.exe buildscripts/resmoke.py --suites=unittests_query --jobs=1   Acutal result: [executor:cpp_unit_test:job0] 2019-07-07T23:24:17.052-0700 db_pipeline_test.exe ran in 29890.23 seconds: failed. [executor:cpp_unit_test:job0] 2019-07-07T23:24:17.052-0700 C++ unit test build\opt\mongo\db\pipeline\db_pipeline_test.exe failed, so stopping... [executor:cpp_unit_test:job0] 2019-07-07T23:24:17.052-0700 Received a StopExecution exception: C++ unit test build\opt\mongo\db\pipeline\db_pipeline_test.exe failed. [executor] 2019-07-07T23:24:17.052-0700 Waiting for threads to complete [executor] 2019-07-07T23:24:17.052-0700 Threads are completed! [executor] 2019-07-07T23:24:17.052-0700 Summary: 25 test(s) ran in 30041.11 seconds (24 succeeded, 64 were skipped, 1 failed, 0 errored) The following tests failed (with exit code): build\opt\mongo\db\pipeline\db_pipeline_test.exe (3221226356 UNKNOWN) [resmoke] 2019-07-07T23:24:17.052-0700 ================================================================================ [resmoke] 2019-07-07T23:24:17.052-0700 Summary of unittests suite: 25 test(s) ran in 30041.11 seconds (24 succeeded, 64 were skipped, 1 failed, 0 errored) The following tests failed (with exit code): build\opt\mongo\db\pipeline\db_pipeline_test.exe (3221226356 UNKNOWN) 25 test(s) ran in 30041.11 seconds (24 succeeded, 64 were skipped, 1 failed, 0 errored) cpp_unit_tests: 25 test(s) ran in 30041.11 seconds (24 succeeded, 64 were skipped, 1 failed, 0 errored) The following tests failed (with exit code): build\opt\mongo\db\pipeline\db_pipeline_test.exe (3221226356 UNKNOWN) [resmoke] 2019-07-07T23:24:17.052-0700 Exiting with code: 1 --- Logging error --- Traceback (most recent call last): File "C:\tools\python3\lib\logging\__init__.py", line 1037, in emit stream.write(msg + self.terminator) File "C:\tools\python3\lib\encodings\cp1252.py", line 19, in encode return codecs.charmap_encode(input,self.errors,encoding_table)[0] UnicodeEncodeError: 'charmap' codec can't encode character '\ufffd' in position 161: character maps to <undefined> Call stack: File "C:\tools\python3\lib\threading.py", line 885, in _bootstrap self._bootstrap_inner() File "C:\tools\python3\lib\threading.py", line 917, in _bootstrap_inner self.run() File "D:\MongoDB\src\buildscripts\resmokelib\core\pipe.py", line 63, in run self.__logger.log(self.__level, line.rstrip()) Message: '2019-07-07T15:03:54.652-0700 I ACCESS [main123456789] invalid char in key file 904a-8ef2-498f-e3c1: \ufffd\x04V' Arguments: () [command took 30042 seconds]