declaration within implied do loop

[Vivek_R_]

I think the code

program implied_do_declaration
implicit none
integer, allocatable :: vec(:)
vec = [(2*i, integer :: i=1,3)]
print*,vec ! 2 4 6
end program implied_do_declaration

is valid Fortran 2018 but Intel Fortran says

ifort -standard-semantics -stand:f18 implied_do.f90
Intel(R) Fortran Intel(R) 64 Compiler Classic for applications running on Intel(R) 64, Version 2021.5.0 Build 20211109_000000
Copyright (C) 1985-2021 Intel Corporation. All rights reserved.

implied_do.f90(4): error #6404: This name does not have a type, and must have an explicit type. [I]
vec = [(2*i, integer :: i=1,3)]
------------------------^
compilation aborted for implied_do.f90 (code 1)

[andrew_4619]

Look at  https://community.intel.com/t5/Intel-Fortran-Compiler/Over-enthusiastic-type-declaration-checking-in-array-constructor/m-p/1348245#M159130