https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91261

            Bug ID: 91261
           Summary: noptr-new-declarator does not accept converted
                    constant expressions
           Product: gcc
           Version: 8.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: smw at gcc dot gnu.org
  Target Milestone: ---

The restrictions on the constant-expression of noptr-new-devlarators was
changed from integral constant expressions in C++11 to converted constant
expressions in C++14 [expr.new] 5.3.4/6.  GCC rejects non-integral expressions
with the message "error: expression in new-declarator must have integral or
enumeration type".

Reproducer follows.

  int main() {
    void* p26 = new int [1.0f][3];
  }

Confirmed in GCC 8.3, 9.1, and trunk.

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