Testing: 0 .. 
FAIL: LLVM-Unit :: tools/llvm-exegesis/./LLVMExegesisTests/PerfHelperTest.FunctionalTest (2933 of 27000)
******************** TEST 'LLVM-Unit :: tools/llvm-exegesis/./LLVMExegesisTests/PerfHelperTest.FunctionalTest' FAILED ********************
Note: Google Test filter = PerfHelperTest.FunctionalTest
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from PerfHelperTest
[ RUN      ] PerfHelperTest.FunctionalTest
/build/llvm/unittests/tools/llvm-exegesis/PerfHelperTest.cpp:37: Failure
      Expected: CallbackEventName
      Which is: ""
To be equal to: "CYCLES:u"
/build/llvm/unittests/tools/llvm-exegesis/PerfHelperTest.cpp:38: Failure
Value of: CallbackEventNameFullyQualifed
Expected: isn't empty
  Actual: ""
[  FAILED  ] PerfHelperTest.FunctionalTest (3 ms)
[----------] 1 test from PerfHelperTest (3 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (3 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] PerfHelperTest.FunctionalTest

 1 FAILED TEST
invalid event attribute - cannot create event CYCLES:u

********************
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 

1 warning(s) in tests.
Testing Time: 108.19s
********************
Failing Tests (1):
    LLVM-Unit :: tools/llvm-exegesis/./LLVMExegesisTests/PerfHelperTest.FunctionalTest

  Expected Passes    : 25609
  Expected Failures  : 141
  Unsupported Tests  : 1249
  Unexpected Failures: 1
make[3]: *** [CMakeFiles/check-all.dir/build.make:58: CMakeFiles/check-all] Error 1
make[3]: Leaving directory '/build/llvm/build'
make[2]: *** [CMakeFiles/Makefile2:365: CMakeFiles/check-all.dir/all] Error 2
make[2]: Leaving directory '/build/llvm/build'
make[1]: *** [CMakeFiles/Makefile2:372: CMakeFiles/check-all.dir/rule] Error 2
make[1]: Leaving directory '/build/llvm/build'
make: *** [Makefile:251: check-all] Error 2
builder for '/nix/store/4kq72x6ahrigryr6yjjj7c7ayqy8z2sl-llvm-7.0.1.drv' failed with exit code 2