[vim/vim] deepcopy() drops items of a list or dict holding a null list (PR #21409)

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h_east

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Sep 30, 2026, 3:57:01 AM (yesterday) Sep 30

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Problem:  deepcopy() of a list or dict that holds a null list, tuple or
          dict drops items, and getscriptinfo() with "sid" leaves out
          "variables" and "functions" for a script with such a variable.
Solution: Let item_copy() fail only when copying a list, tuple or dict
          that is not null fails.

Test_deepcopy_null_item() checks that deepcopy() of a dict and of a list holding a null dict, list and tuple gives an equal copy, in legacy Vim script and Vim9 script. Test_getscriptinfo_null_var() checks "variables" and "functions" of getscriptinfo() for a Vim9 script with a null_dict script variable next to another one.

You can view, comment on, or merge this pull request online at:

https://github.com/vim/vim/pull/21409

Commit Summary

1ed997b deepcopy() drops items of a list or dict holding a null list

File Changes

(3 files)

Patch Links:

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Christian Brabandt

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Sep 30, 2026, 2:43:30 PM (20 hours ago) Sep 30

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chrisbra left a comment (vim/vim#21409)

thanks

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