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<!-- Describe the issue -->
<!--- What behavior did you expect? -->
<!--- What was the actual behavior (provide screenshots if the issue is GUI-related)? -->
...
Running tests: flatfile_tests from ../../src/test/flatfile_tests.cpp
Running tests: fs_tests from ../../src/test/fs_tests.cpp
Running tests: getarg_tests from ../../src/test/getarg_tests.cpp
Running 1 test case...
Entering test module "Bitcoin Core Test Suite"
../../src/test/fs_tests.cpp(11): Entering test suite "fs_tests"
../../src/test/fs_tests.cpp(13): Entering test case "fsbridge_fstream"
unknown location(0): fatal error: in "fs_tests/fsbridge_fstream": boost::system::system_error: boost::filesystem::path codecvt to string: error
../../src/test/fs_tests.cpp(13): last checkpoint: "fsbridge_fstream" entry.
../../src/test/fs_tests.cpp(13): Leaving test case "fsbridge_fstream"; testing time: 40255us
../../src/test/fs_tests.cpp(11): Leaving test suite "fs_tests"; testing time: 40286us
Leaving test module "Bitcoin Core Test Suite"; testing time: 40445us
*** 1 failure is detected in the test module "Bitcoin Core Test Suite"
Makefile:13625: recipe for target 'test/fs_tests.cpp.test' failed
make[3]: *** [test/fs_tests.cpp.test] Error 1
...
<!--- How reliably can you reproduce the issue, what are the steps to do so? -->
This is a fresh clone, run with ../configure --disable-ccache --with-incompatible-bdb under a build/ subdirectory. Running make check, make -j4 check both produce this issue.
<!-- What version of Bitcoin Core are you using, where did you get it (website, self-compiled, etc)? -->
Running off fresh master (commit 1088b90cbae3e9e9fe686356361f1ce08ad8a478)
<!-- What type of machine are you observing the error on (OS/CPU and disk type)? -->
Debian GNU/Linux 9.9 (stretch) ; Xeon E5-2630L on VPS. libboost-filesystem version is 1.67.0-7~bpo9+1
