Make sure cached ECs don't get modifed #4818
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…tances" This reverts commit 3836140.
This reverts commit 5f04b7b.
The `__deepcopy__` needs to be very generic to avoid misleading results by not copying all (possibly changed) attributes. So leave that alone and use `ec.copy()` on the `'ec'` key directly in the cache code.
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The type that is cached is a dictionary containing the EasyConfig in the
"ec"key. Hence we end up invokingdict.copynotec.copyThis results in not making independent copies and hence modifications affect all references even those gotten later
Revert 3836140 which introduced the issue
Our current
EasyConfig.copymethod effectively parses the EasyConfig text again invoking e.g. theparse_hookagain.I guess
__deepcopy__needs to be more smart than this to not also miss attributes set after the construction. Hence I left that out and just usedec.copy()as was likely intended by the above commit. It just needs to be done on the EasyConfig instance while the dict itself can be deep-copied if it doesn't contain the easyconfig.