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[mcl_portals] Fix crash on access empty index trying to find portal after its destruction
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@ -103,7 +103,7 @@ local function add_exit(p)
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local e = exits[k]
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for i = 1, #e do
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local t = e[i]
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if t.x == p.x and t.y == p.y and t.z == p.z then
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if t and t.x == p.x and t.y == p.y and t.z == p.z then
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return
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end
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end
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