6375 – [CTFE] Segfault when using std.array.appender with an initial array

Test case:
-----------------------------
struct D6375 {
 int[] arr;
}
A6375 a6375(int[] array) {
 return A6375(array);
}
struct A6375 {
 D6375* _data;
 this(int[] arr) {
 _data = new D6375;
 _data.arr = arr;
 }
 int[] data() {
 return _data.arr;
 } 
}
static assert({
 int[] a = [ 1, 2 ];
 auto app2 = a6375(a);
 auto data = app2.data();
 return true;
}());
-----------------------------
Bus error: 10
-----------------------------
This is essentially the trimmed down version of the unit test for std.array.appender, running in CTFE. The segfault is due to StructLiteralExp::getField in expression.c:
 if (e->type->castMod(0) != type->castMod(0) && type->ty == Tsarray)
 // ^^^^ e->type is NULL
Running e->semantic() once fixed the issue, but I'm not sure if this is the best solution.

https://github.com/D-Programming-Language/dmd/commit/0904c8aa200e4d080d500d96d5904c33ba17cc86
https://github.com/D-Programming-Language/dmd/commit/e48a8c67f02172c72e04f36759d2d6868d716368