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Describe what a state reset is

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Signed-off-by: Aaron Raimist <aaron@raim.ist>
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Aaron Raimist 2020-10-13 11:42:21 -05:00
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specification/rooms/v1.rst
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@ -89,8 +89,14 @@ State resolution
~~~~~~~~~~~~~~~~
.. WARNING::
Room version 1 is known to have bugs that can cause the state of rooms to reset.
This is fixed in room version 2 and later.
Room version 1 is known to have bugs that can cause the state of rooms to reset
to older versions of the room's state. For example this could mean that users
who had joined the room may be removed from the room, admins and moderators
could lose their power level, and users who has been banned from the room may
be able to rejoin. Other state events such as the the room's name or topic could
also reset to a previous version.
This is fixed in the state resolution algorithm introduced in room version 2.
The room state :math:`S'(E)` after an event :math:`E` is defined in terms of
the room state :math:`S(E)` before :math:`E`, and depends on whether