source_clang_test failure

Hei!

I'm trying to package JuCi++ for GNU Guix, but am getting a test failure in source_clang_test:

 7/11 Test  #7: source_clang_test ................Child aborted***Exception:   4.13 sec
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ERROR:/tmp/guix-build-jucipp-1.5.1.drv-0/source/tests/source_clang_test.cc:163:int main(): assertion failed (clang_view->clang_diagnostics.size() == 0): (20 == 0)

Any ideas what might be wrong?