CMark test failures on Linux

gistfile1.txt

note: Using new build system
note: Building targets in parallel
note: Planning build
note: Constructing build description
PhaseScriptExecution Generate\ CMakeFiles/ZERO_CHECK /Users/dabrahams/src/s/build/Xcode-RelWithDebInfoAssert+swift-DebugAssert/cmark-macosx-x86_64/cmark.build/Debug/ZERO_CHECK.build/Script-91C33003B238438AB28443E8.sh (in target 'ZERO_CHECK' from project 'cmark')
    cd /Users/dabrahams/src/s/cmark
    /bin/sh -c /Users/dabrahams/src/s/build/Xcode-RelWithDebInfoAssert+swift-DebugAssert/cmark-macosx-x86_64/cmark.build/Debug/ZERO_CHECK.build/Script-91C33003B238438AB28443E8.sh
make: `/Users/dabrahams/src/s/build/Xcode-RelWithDebInfoAssert+swift-DebugAssert/cmark-macosx-x86_64/CMakeFiles/cmake.check_cache' is up to date.

WriteAuxiliaryFile /Users/dabrahams/src/s/build/Xcode-RelWithDebInfoAssert+swift-DebugAssert/cmark-macosx-x86_64/cmark.build/Debug/RUN_TESTS.build/Script-45142B9BF94F470196CB2966.sh (in target 'RUN_TESTS' from project 'cmark')
    cd /Users/dabrahams/src/s/cmark
    write-file /Users/dabrahams/src/s/build/Xcode-RelWithDebInfoAssert+swift-DebugAssert/cmark-macosx-x86_64/cmark.build/Debug/RUN_TESTS.build/Script-45142B9BF94F470196CB2966.sh

PhaseScriptExecution CMake\ PostBuild\ Rules /Users/dabrahams/src/s/build/Xcode-RelWithDebInfoAssert+swift-DebugAssert/cmark-macosx-x86_64/cmark.build/Debug/RUN_TESTS.build/Script-45142B9BF94F470196CB2966.sh (in target 'RUN_TESTS' from project 'cmark')
    cd /Users/dabrahams/src/s/cmark
    /bin/sh -c /Users/dabrahams/src/s/build/Xcode-RelWithDebInfoAssert+swift-DebugAssert/cmark-macosx-x86_64/cmark.build/Debug/RUN_TESTS.build/Script-45142B9BF94F470196CB2966.sh
Test project /Users/dabrahams/src/s/build/Xcode-RelWithDebInfoAssert+swift-DebugAssert/cmark-macosx-x86_64
    Start 1: api_test
1/9 Test #1: api_test .........................   Passed    0.34 sec
    Start 2: html_normalization
2/9 Test #2: html_normalization ...............   Passed    0.16 sec
    Start 3: spectest_library
3/9 Test #3: spectest_library .................***Failed    0.08 sec
    Start 4: pathological_tests_library
4/9 Test #4: pathological_tests_library .......***Failed    0.06 sec
    Start 5: roundtriptest_library
5/9 Test #5: roundtriptest_library ............***Failed    0.06 sec
    Start 6: entity_library
6/9 Test #6: entity_library ...................***Failed    0.05 sec
    Start 7: spectest_executable
7/9 Test #7: spectest_executable ..............***Failed    0.07 sec
    Start 8: smartpuncttest_executable
8/9 Test #8: smartpuncttest_executable ........***Failed    0.06 sec
    Start 9: regressiontest_executable
9/9 Test #9: regressiontest_executable ........***Failed    0.06 sec

22% tests passed, 7 tests failed out of 9

Total Test time (real) =   0.95 sec

The following tests FAILED:
	  3 - spectest_library (Failed)
	  4 - pathological_tests_library (Failed)
	  5 - roundtriptest_library (Failed)
	  6 - entity_library (Failed)
	  7 - spectest_executable (Failed)
	  8 - smartpuncttest_executable (Failed)
	  9 - regressiontest_executable (Failed)
Errors while running CTest
Command PhaseScriptExecution failed with a nonzero exit code

** BUILD FAILED **