Extended Description

While attempting to compile this code (bla.cpp):

//##################
int nested(int a){
#pragma omp parallel
++a;

auto F = &{
#pragma omp parallel
{
#pragma omp target
++a;
}
};
F();
return a;
}
//##################

With the frontend command:

clang -cc1 -internal-isystem $CLANG_PATH/bin/../lib/clang/3.8.0/include -nostdsysteminc -fopenmp -x c++ -triple x86_64-unknown-unknown -o - bla.cpp

it gets into an infinite loop in the parser. Note that the code needs -std=c++11, and adding this extra option makes the problem go away. Nevertheless, the compiler should not run forever if the user forgets to add that.