rfc:remove_disable_classes

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rfc:remove_disable_classes [2023/09/29 18:25] – created girgiasrfc:remove_disable_classes [2023/10/02 21:28] (current) – Fix a few typos theodorejb
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 ===== Introduction ===== ===== Introduction =====
  
-The ''disable_classes'' INI setting is fundamentally useless and cause various issues in the engine, as using it will result in unexpected states for the engine to deal with.+The ''disable_classes'' INI setting is fundamentally useless and causes various issues in the engine, as using it will result in unexpected states for the engine to deal with.
  
 Only internal classes can be disabled, which brings the following observation. Only internal classes can be disabled, which brings the following observation.
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 And "disabling" a class from an extension without disabling said extension will, other than rendering it useless, cause various issues that the extension is not prepared to handle as they expect the classes they defined to exist. And "disabling" a class from an extension without disabling said extension will, other than rendering it useless, cause various issues that the extension is not prepared to handle as they expect the classes they defined to exist.
  
-If a hosting provided is concerned about an extension, then it should not enable it in the first place. Not break it ad hoc.+If a hosting provider is concerned about an extension, then it should not enable it in the first place. Not break it ad hoc.
  
 Considering the above, the usefulness of this feature has always been dubious. Considering the above, the usefulness of this feature has always been dubious.
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 What makes this setting particularly broken is that it does not unregister the class, it only overwrites the create CE handler to emit a warning and purge the properties and function hash tables. What makes this setting particularly broken is that it does not unregister the class, it only overwrites the create CE handler to emit a warning and purge the properties and function hash tables.
 This leads to various use after free, segfaults, and broken expectations for the engine and extensions which define said classes. This leads to various use after free, segfaults, and broken expectations for the engine and extensions which define said classes.
-On top of that, it is possible to actually instantiate such a class (and even classes which actually disallow this like ''ext/imap'') in userland, and pass it to function that are typed against said class without raising a TypeError.+On top of that, it is possible to actually instantiate such a class (and even classes which actually disallow this like ''ext/imap'') in userland, and pass it to functions that are typed against said class without raising a TypeError.
 However, when trying to do anything with said object, stuff is going to explode in countless ways. However, when trying to do anything with said object, stuff is going to explode in countless ways.
  
rfc/remove_disable_classes.1696011912.txt.gz · Last modified: 2023/09/29 18:25 by girgias

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