PROTECT overprotects objects

[Siskin-Bot]

Submitted by: Carl

PROTECT protects the values of an object from being set. However, without /deep, it should still be possible to modify the contents of those values.

The example below shows that modification of a sub-object is not allowed, but it should be.

This may be related to some of the other PROTECT related bugs.

>> obj: object [a: object [b: 10]]
== make object! [
    a: make object! [
        b: 10
    ]
]

>> protect obj
== make object! [
    a: make object! [
        b: 10
    ]
]

>> obj/a: 0
** Script error: protected variable - cannot modify: a ;<- correct


>> obj/a/b: 20
** Script error: protected variable - cannot modify: a ;<- wrong

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^{Imported from: CureCode [ Version: alpha 76 Type: Bug Platform: All Category: Security Reproduce: Always Fixed-in:alpha 79 ]
Imported from: metaeducation#1170}

Comments:

Rebolbot commented on Aug 4, 2009:

Submitted by: BrianH

See #1014 for the proposed behavior to fix this bug in PROTECT. And #1015 for UNPROTECT.

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Rebolbot mentioned this issue on Jan 12, 2016:
SYSTEM/MODULES needs access controls, similar to SECURE

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Rebolbot added Type.bug and Status.important on Jan 12, 2016

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[Oldes]

>> obj: protect object [a: object [b: 10]]
== make object! [
    a: make object! [
        b: 10
    ]
]

>> obj/a: 0
** Script error: protected variable - cannot modify: a

>> obj/a/b: 20
== 20