How to “set a breakpoint in malloc_error_break to debug” in Qt Creator?

My Qt5 app crashes when I hit the close window returning:

MyApp(28741,0x7fff7aa73000) malloc: *** error for object 0x7fc40bc8e300: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
The program has unexpectedly finished.

How to “set a breakpoint in malloc_error_break to debug” in Qt Creator 4 (Mac OS)?

Should be better to do it via terminal in lldb/gdb, how?