Missing implicit handler for terminate call from __cxa_vec_dtor

[hubert-reinterpretcast]

N4910 subclause 14.4 [except.handle] paragraphs 7 and 8:

[ ... ] an implicit handler is considered active when the function std::terminate is entered due to a throw. [ ... ] The exception with the most recently activated handler that is still active is called the currently handled exception.

With libc++abi, if an exception throws from more than one destructor called from __cxa_vec_dtor, a call to terminate occurs; however, the currently handled exception within the terminate handler is not updated to match the exception being thrown such that terminate is called.
The GNU runtime library has no such problem.

Online compiler link: https://godbolt.org/z/rYvrM554W

SOURCE (<stdin>):

#include <cxxabi.h>
struct A {
  ~A() noexcept(false) {
    static int cnt;
    if (cnt++)
      throw 0.f;
    throw 0;
  }
};
void dtorfunc(void *p) { static_cast<A *>(p)->~A(); }
int main(void) {
  try {
    throw L'\0';
  } catch (...) {
    try {
      __cxxabiv1::__cxa_vec_dtor(new A[2], 2u, sizeof(A), dtorfunc);
    } catch (...) {}
  }
}

COMPILER INVOCATION COMMAND:

clang++ -stdlib=libc++ -xc++ -

RUN INVOCATION:

./a.out

ACTUAL RUN OUTPUT:

libc++abi: terminating with uncaught exception of type wchar_t

EXPECTED RUN OUTPUT:

libc++abi: terminating with uncaught exception of type float

COMPILER VERSION INFO (clang++ -v):

clang version 15.0.0 (https://github.com/llvm/llvm-project.git a0d40a579a6f27a1b1cdb7d68b2145e332c02c4e)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/wandbox/clang-head/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9
Candidate multilib: .;@m64
Selected multilib: .;@m64