[Qt-creator] How do I see clang warning when using clang code model?

[Nikos Chantziaras]

I tried the clang code model plugin with Creator 3.6.0. A lot of yellow 
triangle warning signs show up, but there's nothing in the "Issues" 
panel (Alt+1). Neither in any of the other panels. Clicking on the 
yellow triangles just places breakpoints, it doesn't open any tooltip 
with the warning or anything.

How do I deal with all these yellow triangles?