Clang rejects valid program having new C[]{1}

[ranaanoop]

The following valid program is rejected by clang. Demo

struct C{
   C(int);
};
int main() {
    C *ptr{new C[]{1}}; //clang rejects but gcc accepts
}

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Anoop Rana (ranaanoop)

The following valid program is rejected by clang. [Demo](https://godbolt.org/z/hzxfdnzod)

struct C{
   C(int);
};
int main() {
    C *ptr{new C[]{1}}; //clang rejects but gcc accepts
}

[shafik]

Confirmed.

CC @Fznamznon

[MaskRay]

Similar to #76976 @alanzhao1

[zygoloid]

https://eel.is/c++draft/expr.new#9 presumably does not apply here because there is no expression at all in this case.