If the passport gets officially cancelled and stamped by the passport office ... U could use the old one. But ring up the embassy call center to confirm this because any misinformation could jeopardize your travel. Alternatively you could google search the validity of your old TRV.
https://www.canadavisa.com/canada-immigration-discussion-board/threads/valid-multiple-visa-in-old-passport-can-i-enter-canada.85627/
Try searching the CIC sites. You may get specific question / answer about your case.
https://www.canadavisa.com/canada-immigration-discussion-board/threads/valid-multiple-visa-in-old-passport-can-i-enter-canada.85627/
Try searching the CIC sites. You may get specific question / answer about your case.