VC ++ 17内部编译器错误

Question

I have some really weirdly behaving code which makes the compiler crash. I am using VC++ 17:

//.hpp
typedef unsigned short UID;
typedef UID GoodType;
typedef struct _Recipe
{
    typedef struct {
        GoodType goodType; unsigned short units;
    } GoodRatio;
    std::vector<GoodRatio> input;
    GoodRatio output;
    //int a;
} Recipe;

//.cpp
int main()
{
    std::vector<Recipe> recipes
    {
        {
            { { 0, 1 }, { 1, 2 } }, { 2, 1 }
        },
    };
}

The error:

1>c:\users\peter\downloads\nationsgamemockup\nationsgamemockup\nationsgamemockup.cpp(25): fatal error C1001: An internal error has occurred in the compiler.
1>(compiler file 'f:\dd\vctools\compiler\utc\src\p2\main.c', line 255)
1> To work around this problem, try simplifying or changing the program near the locations listed above.

The behaviour I observed so far:

If I uncomment the //int a; line the error goes away regardless of whether I add an argument for a in the constructor call in the main function.

If I comment the std::vector<GoodRatio> input; line and remove the corresponding argument from the constructor call the error goes away.

If I comment the GoodRatio output; line and remove the corresponding argument from the constructor call the error goes away.

If I change the recipes variable in main to just a single recipe the error goes away (as in simply Recipe a{ { { 0, 1 },{ 1, 2 } },{ 2, 1 } }; ).

Note: The _Recipe struct cannot be an anonymous struct because it has a data member of type std::vector<GoodRatio> and the Recipe::GoodRatio type only comes into existence at the semicolon after the typedef. That is my guess at least. I get an error if I try to do this.

Edit: My question is: Why does this happen?

Answer 1

Adding a constructor to GoodRatio seems to solve the problem:

GoodRatio(unsigned short goodType = {}, unsigned short units = {}) :
goodType{ goodType }, units{ units } {}

I have also sent feedback to microsoft.