[Beignet] Does LLVM 3.6 still hit a bug?

[Rebecca N. Palmer]

Debian are planning to switch their default LLVM/Clang to 3.6 soon.  Is 
it still the case that
> The recommended LLVM/CLANG version is 3.5 and/or 3.6. Based on our test result, LLVM 3.5 has best pass rate on all the test suites. Compare to LLVM 3.5, LLVM 3.6 has slightly lower pass rate(caused by one front end bug at clang 3.6) but has better performance (3% to 5% up).
(http://www.freedesktop.org/wiki/Software/Beignet/)?  Where can I find 
code to test for this bug (the test suite doesn't)?