[Bug c++/81051] New: lambda capture of this in initialization list with virtual inheritance

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81051

            Bug ID: 81051
           Summary: lambda capture of this in initialization list with
                    virtual inheritance
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dje at gcc dot gnu.org
  Target Milestone: ---

[Reported on Stackoverflow
https://stackoverflow.com/questions/43748646/gcc-bug-with-lambda-capture-of-this-in-initialization-list-with-virtual-inherita]

The following code segfaults under gcc-4.9, 5.4, and 6.3 with std=c++11, but
compiles and runs fine under clang-3.7, and VS2015 Update 3.

C++14 12.7.3 is fairly explicit that this should be allowed.

struct A
{
    int Func() { return x++; }
    int x = 5;
};

struct B
{
    B(int) {}
};

struct Derived : public virtual A, public B
{
    Derived()
      : A()
      // , B(this->Func()) // This works!
      , B([this](){ return this->Func(); }()) // But this segfaults.
    {
    }
};

int main()
{
    Derived c;
}