Failing unit tests: StringCache, RefactoringProjectUpdater.UpdateProjectPart

Q Creator master, against our currently shipped LLVM/Clang 8.

12:33:07: Starting /d1/creator/master/builds/unit/unittest/unittest --gtest_filter=StringCache/0.AddFilePathsWithStorageFunction...
QML debugging is enabled. Only use this in a safe environment.
Note: Google Test filter = StringCache/0.AddFilePathsWithStorageFunction
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from StringCache/0, where TypeParam = ClangBackEnd::StringCache<Utils::BasicSmallString<190u>, Utils::SmallStringView, int, testing::NiceMock<MockMutex>, int (Utils::SmallStringView, Utils::SmallStringView), &Utils::reverseCompare, ClangBackEnd::StringCacheEntry<Utils::BasicSmallString<190u>, Utils::SmallStringView, int> >
[ RUN ] StringCache/0.AddFilePathsWithStorageFunction
12:33:07: The program has unexpectedly finished.
12:33:07: The process was ended forcefully.
12:33:08: /d1/creator/master/builds/unit/unittest/unittest crashed.

12:32:26: Starting /d1/creator/master/builds/unit/unittest/unittest --gtest_filter=RefactoringProjectUpdater.UpdateProjectPart...
QML debugging is enabled. Only use this in a safe environment.
Note: Google Test filter = RefactoringProjectUpdater.UpdateProjectPart
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from RefactoringProjectUpdater
[ RUN ] RefactoringProjectUpdater.UpdateProjectPart
unknown file: Failure
C++ exception with description "map::at" thrown in the test body.
../../../source/tests/unit/unittest/refactoringprojectupdater-test.cpp:124: Failure
Actual function call count doesn't match EXPECT_CALL(mockRefactoringServer, updateProjectParts(Field(&UpdateProjectPartsMessage::projectsParts, ElementsAre(IsProjectPartContainer(3)))))...
{{ Expected: to be called once}}
{{ Actual: never called - unsatisfied and active}}
[ FAILED ] RefactoringProjectUpdater.UpdateProjectPart (4 ms)
[----------] 1 test from RefactoringProjectUpdater (4 ms total)[----------] Global test environment tear-down
[==========] 1 test from 1 test suite ran. (4 ms total)
[ PASSED ] 0 tests.
[ FAILED ] 1 test, listed below:
[ FAILED ] RefactoringProjectUpdater.UpdateProjectPart1 FAILED TEST
12:32:27: /d1/creator/master/builds/unit/unittest/unittest exited with code 1