constexpr struct/class instantiation not working

[Toni Neubert]

The following code snipped does not compile under ARM gcc 8.x (also arm-none-eabi):

```
constexpr int bar{1};

struct Foo {
 int value{bar};
};

constexpr Foo f;

constexpr Foo f2{}; // Error occurs here.
```

Fails to compile with: 'const Foo{((int)bar)}' is not a constant expression

Check out: https://godbolt.org/z/JGKfNk

It works in ARM gcc 7.x and all x86-64 clang/gcc version.

[Toni Neubert (viatorus)]

Solved in GCC 8.2019.3+Update. Thank you! :)

[Toni Neubert (viatorus)]

GCC 8.2019.3+Update