May the later tashrīʿ ending add meaning?

Qalb, Tashrīʿ and Luzūm Mā Lā Yalzam: Completing the Verbal Ornaments

• Yes, if both stops remain valid, an expansion is possible
• No, both must have identical content letter for letter
• No; expansion converts it to qalb
• Yes, only if the first ending is meaningless