baloo-widgets-15.12.0 compiled against baloo-5.17 and Qt 5.5.1 fails its only test:

Running tests...
/usr/x86_64-pc-linux-gnu/bin/ctest --force-new-ctest-process --verbose
UpdateCTestConfiguration  from :/var/tmp/paludis/build/kde-baloo-widgets-15.12.0/work/build/DartConfiguration.tcl
UpdateCTestConfiguration  from :/var/tmp/paludis/build/kde-baloo-widgets-15.12.0/work/build/DartConfiguration.tcl
Test project /var/tmp/paludis/build/kde-baloo-widgets-15.12.0/work/build
Constructing a list of tests
Done constructing a list of tests
Checking test dependency graph...
Checking test dependency graph end
test 1
    Start 1: extractortest

1: Test command: /var/tmp/paludis/build/kde-baloo-widgets-15.12.0/work/build/autotests/extractortest
1: Test timeout computed to be: 9.99988e+06
1: ********* Start testing of ExtractorTest *********
1: Config: Using QtTest library 5.5.1, Qt 5.5.1 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 5.2.0)
1: PASS   : ExtractorTest::initTestCase()
make: *** No rule to make target 'check'.  Stop.
make -j5 ARGS=--verbose test

Error:
  * In program cave perform install --hooks --managed-output --output-exclusivity with-others =kde/baloo-widgets-15.12.0:4::kde --destination installed --replacing =kde/baloo-widgets-15.12.0:4::installed --x-of-y 1 of 1:
  * When installing 'kde/baloo-widgets-15.12.0:4::kde' replacing { 'kde/baloo-widgets-15.12.0:4::installed' }:
  * When running an ebuild command on 'kde/baloo-widgets-15.12.0:4::kde':
  * Install failed for 'kde/baloo-widgets-15.12.0:4::kde' (paludis::ActionFailedError)

1: FAIL!  : ExtractorTest::test() Compared values are not the same
1:    Actual   (data.size()): 3
1:    Expected (2)          : 2
1:    Loc: [/var/tmp/paludis/build/kde-baloo-widgets-15.12.0/work/baloo-widgets-15.12.0/autotests/extractortest.cpp(54)]
1: PASS   : ExtractorTest::cleanupTestCase()
1: Totals: 2 passed, 1 failed, 0 skipped, 0 blacklisted
1: ********* Finished testing of ExtractorTest *********
1/1 Test #1: extractortest ....................***Failed    0.04 sec

0% tests passed, 1 tests failed out of 1

Total Test time (real) =   0.04 sec

The following tests FAILED:
          1 - extractortest (Failed)
Makefile:130: recipe for target 'test' failed


Reproducible: Always