patch 8.2.1373: Vim9: no error for assigning to non-existing script var Commit: https://github.com/vim/vim/commit/f9b2b49663226235f94f08230fe9023caf80a6e9 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Aug 5 14:34:14 2020 +0200 patch 8.2.1373: Vim9: no error for assigning to non-existing script var Problem: Vim9: no error for assigning to non-existing script var. Solution: Check that in Vim9 script the variable was defined. (closes https://github.com/vim/vim/issues/6630)

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