VK-GL-CTS Khronos members and Confidential Conformance Test Suite

I download VK-GL-CTS and build it, I have some questions about it, is there anybody clear it.
I can run glcts to test specific case, the result is fail, but the cts-runner always core dump.

One more question, does there have any introduction about the source code, can I get all the sourcecode of the test cases.
What the meaning of the “Khronos members” and “Khronos Confidential Conformance Test Suite”, what’s the different when I use the test suit as a “non-Khronos members”