Fix: empty mathlive lastSibling.type#1
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lamhungypl wants to merge 2 commits into
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March 19, 2026 11:02
atom is captured before ModeEditor.insert() mutates the tree. After insert, atom.parent may be undefined, making lastSibling return undefined and crashing on .type access. Optional chaining skips the content-move block safely when the atom has been detached from the tree.
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