Created attachment 1470643 [details]
Test case to reproduce issue

Description of problem:
Use of template alias leads to unexpected results.

Version-Release number of selected component (if applicable):
clang version 5.0.1

Steps to Reproduce:
1. Download test.cpp attachment
2. Run command: scl enable llvm-toolset-7 'bash'
3. Compile the attachment: clang++ -std=c++11 test.cpp

Actual results:
Compile time assertions are failing.

Expected results:
Should compile without errors.