APPEND can create duplicate words in an object

[rebolbot]

Submitted by: Sunanda

ob: object []
append ob  [b: 2 b: 3 b: 4]
== make object! [
        b: 2
        b: 3
        b: 4
    ]

foreach w words-of ob [print get w]   ;; they are actually different
    2
    3
    4

This does not happen if the word is already in the object (unless it is hidden)/

ob: object []
append ob  [b: 2 b: 3 b: 4]  ;; not sure if append should error out or silently discard duplicate values
(length? words-of ob) = 1   ;; not one is bad
ob/b = 2            ;; other value is bad

^{CC - Data [ Version: r3 master Type: Bug Platform: All Category: Native Reproduce: Always Fixed-in:none ]}

[rebolbot]

Submitted by: MarcS

Proposed fix and discussion: rebol/rebol#105

[rebolbot]

Submitted by: Ladislav

In the core-tests suite.

[rebolbot]

Submitted by: BrianH

Have APPEND silently override duplicate values, taking the last specified value as the one that wins. That is consistent with the behavior of APPEND when it has words that already exist in the object before the append.

[rebolbot]

Submitted by: Ladislav

Fixed by rebol/rebol#153