Another coarray bug with 17U4

When the code below is run with the coarray option toggled on, different behaviors are observed depending on which line (20 or 21) is commented out.

• Commenting out line 20 yields the expected result
• Commenting out line 21 yields an access violation error on line 37.

Since the variable on line 37 is not coindexed, I am surprised by this result. Does this work with version 18 of the compiler?

MODULE M

    IMPLICIT NONE
    TYPE,ABSTRACT :: T_SHAPE_CONTAINER
        CHARACTER(LEN=:),ALLOCATABLE :: NAME
    END TYPE T_SHAPE_CONTAINER
    TYPE,EXTENDS(T_SHAPE_CONTAINER) :: T_POINT_CONTAINER
        REAL,ALLOCATABLE :: COORDINATES(:,:)
    END TYPE T_POINT_CONTAINER
    TYPE,EXTENDS(T_SHAPE_CONTAINER) :: T_LINE_CONTAINER
        REAL,ALLOCATABLE :: COORDINATES(:,:,:)
    END TYPE T_LINE_CONTAINER
    TYPE :: T_CONTAINER
        CLASS(T_SHAPE_CONTAINER),ALLOCATABLE :: SHAPE_CONTAINER
    END TYPE T_CONTAINER
    TYPE :: T_SHAPE_DATA
        TYPE(T_CONTAINER),ALLOCATABLE :: SHAPES(:)
    END TYPE T_SHAPE_DATA

    TYPE(T_SHAPE_DATA) :: SHAPE_DATA_1[*],SHAPE_DATA_2[*]
    !TYPE(T_SHAPE_DATA) :: SHAPE_DATA_1,SHAPE_DATA_2

END MODULE M


PROGRAM P

    USE M
    IMPLICIT NONE
    INTEGER :: I

        ALLOCATE(SHAPE_DATA_1%SHAPES(2))
        ALLOCATE(T_POINT_CONTAINER :: SHAPE_DATA_1%SHAPES(1)%SHAPE_CONTAINER)
        ALLOCATE(T_LINE_CONTAINER  :: SHAPE_DATA_1%SHAPES(2)%SHAPE_CONTAINER)

        DO I=1,2
            SELECT TYPE (A => SHAPE_DATA_1%SHAPES(I)%SHAPE_CONTAINER)
                TYPE IS (T_POINT_CONTAINER)
                    A%NAME = 'Points'
                    ALLOCATE(A%COORDINATES(3,2))
                    A%COORDINATES(:,1) = [1.,2.,3.]
                    A%COORDINATES(:,2) = [4.,5.,6.]
                TYPE IS (T_LINE_CONTAINER)
                    ALLOCATE(A%COORDINATES(3,2,2))
                    A%NAME = 'Lines'
                    A%COORDINATES(:,1,1) = [7.,8.,9.]
                    A%COORDINATES(:,2,1) = [10.,11.,12.]
                    A%COORDINATES(:,1,2) = [13.,14.,15.]
                    A%COORDINATES(:,2,2) = [16.,17.,18.]
            END SELECT
        END DO

        SHAPE_DATA_2 = SHAPE_DATA_1

        DO I=1,2
            SELECT TYPE (A => SHAPE_DATA_2%SHAPES(I)%SHAPE_CONTAINER)
                TYPE IS (T_POINT_CONTAINER)
                    WRITE(*,* )A%NAME
                    WRITE(*,*) A%COORDINATES
                TYPE IS (T_LINE_CONTAINER)
                    WRITE(*,* )A%NAME
                    WRITE(*,*) A%COORDINATES
            END SELECT
        END DO

END PROGRAM P