functions: Fix defaults for null objects/tuples #28067
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When using defaults with a value which contains null objects or tuples, we cannot continue to traverse the value and apply defaults. Instead, when we find an attribute which is null, we return early and stop processing this branch.
alisdair
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functions
experiment/module_variable_optional_attrs
0.15-backport
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If no default is specified for a nested optional structural typed attribute, the defaults function should just pass through its input. Before this commit the function assumed that the fallback value was always of the correct type, which would panic.
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In following up with the original reporter I found another related panic, so I pushed a follow-up commit adding a fix and tests for that one. |
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I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further. |
ghost
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When using defaults with a value which contains null objects or tuples, we cannot continue to traverse the value and apply defaults. Instead, when we find an attribute which is null, we return early and stop processing this branch.
Previously this would panic. This behaviour is a little counter-intuitive to me, but I think it's consistent with how defaults work. The alternative I considered was replacing the
nullvalue with a copy of the given fallback object/tuple, but that wasn't obviously correct either.Fixes #28046.