iOS Error: Running the project on iOS12 gives an error, but it works fine on iOS11

Question

The project enters the background, switches the wifi network, and enters the project to make a network request. The request process will report an error. The error message is as follows:

xxx(739,0x16ca7f000) malloc: Heap corruption detected, free list is damaged at 0x280c78fa0

*** Incorrect guard value: 206401777864449

xxx(739,0x16ca7f000) malloc: *** set a breakpoint in malloc_error_break to debug.

Answer 1

xcode10 -- Edit scheme -- Diagnostics -- select "Address Sanitizer"