QTableWidget onCurrentItemChanged(QTableWidgetItem *cur, QTableWidgetItem *prev),When program started, prev is null

[echo_lovely]

• Environment

1. OS: Ubuntu 20.04
2. Qt -version 5.12.8

QTableWidget onCurrentItemChanged(QTableWidgetItem *cur, QTableWidgetItem *prev),
When program frist starts, the address of prev is 0x0，how to handle with the problem?

QAQ

[echo_lovely]

0x0 looks lile a wronged person or bear! ahaha

[JonB]

@echo_lovely
There is no "problem". First time it is called you are (presumably) changing from no current item (0x0, nullptr) to some current item. Perfectly reasonable? So do not try to access prev->... if prev == nullptr.