Test Environment
Platform: KBL-G (Intel NUC i7)
CPU: Intel (R) Core (TM) i7-8809G CPU @3.10GHz
GPU: AMD(Radeon RX Vega M GH Graphics)
Memory: 16G
OS: Ubutu16.04
Kernel: 4.18.0-rc3
amd driver version: amdgpu-pro-18.40-673869-ubuntu-16.04.tar.xz (Open Stack) 
VK-GL-CTS: https://github.com/KhronosGroup/VK-GL-CTS (commit
id:54e546a1a0a6fa412ea4c3e3081bbc9518928a6e)


When running the test case, got the test failed result from the test tool
./glcts -n KHR-GL31.transform_feedback.api_errors_test
Writing test log into TestResults.qpa
dEQP Core unknown (0xcafebabe) starting..
target implementation = 'Default'

Test case 'KHR-GL31.transform_feedback.api_errors_test'..
Fail (Fail)

DONE!

Test run totals:
Passed: 0/1 (0.0%)
Failed: 1/1 (100.0%)
Not supported: 0/1 (0.0%)
Warnings: 0/1 (0.0%)

More info:
With AMD driver 18.10 (amdgpu-pro-18.10-516951.tar.gz (open stack)) the test
passed.