[llvm-bugs] [Bug 52063] New: new[] with deduced size requires the type to be default-constructible

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=52063

            Bug ID: 52063
           Summary: new[] with deduced size requires the type to be
                    default-constructible
           Product: clang
           Version: 12.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: blckcat at inbox.ru
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

Code:
    struct A { A(int) {} };
    int main() { new A[]{A(1),A(2),A(3)}; }

This produces following error:
    error: no matching constructor for initialization of 'A'
    note: candidate constructor not viable: requires 1 argument, but 0 were
provided
    (more candidates explained here)
    note: in implicit initialization of trailing array elements in
runtime-sized array new

Since the array size is known at compile-time, this looks like a bug. GCC &
MSVC accept this code.

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