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==2708== ERROR: AddressSanitizer: heap-use-after-free on address 0x602e0001fc64 at pc 0x4007f9 bp 0x7ffd8b8b0830 sp 0x7ffd8b8b0828----错误类型说明是对堆的释放后使用，调用地址在0x4007f9.
READ of size 4 at 0x602e0001fc64 thread T0
#0 0x4007f8 (/home/al/temp/address_sanitizer/use_after_free+0x4007f8)---------------------------错误现场在use_after_free的0x4007f8，在第“return array[argc];”行。
#1 0x7fcbf515582f (/lib/x86_64-linux-gnu/libc-2.23.so+0x2082f)
#2 0x4006b8 (/home/al/temp/address_sanitizer/use_after_free+0x4006b8)
0x602e0001fc64 is located 4 bytes inside of 400-byte region [0x602e0001fc60,0x602e0001fdf0)
freed by thread T0 here:
#0 0x7fcbf551083a (/usr/lib/x86_64-linux-gnu/libasan.so.0.0.0+0x1183a)
#1 0x4007ac (/home/al/temp/address_sanitizer/use_after_free+0x4007ac)---------------------------释放现场，通过addr2line得到对应第“delete [] array;”行。
#2 0x7fcbf515582f (/lib/x86_64-linux-gnu/libc-2.23.so+0x2082f)
previously allocated by thread T0 here:
#0 0x7fcbf551067a (/usr/lib/x86_64-linux-gnu/libasan.so.0.0.0+0x1167a)
#1 0x400795 (/home/al/temp/address_sanitizer/use_after_free+0x400795)---------------------------申请现场，通过addr2line得到对应第“int *array = new int[100];”行。
#2 0x7fcbf515582f (/lib/x86_64-linux-gnu/libc-2.23.so+0x2082f)
Shadow bytes around the buggy address:
0x0c063fffbf30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c063fffbf40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c063fffbf50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c063fffbf60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c063fffbf70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c063fffbf80: fa fa fa fa fa fa fa fa fa fa fa fa[fd]fd fd fd------------------------------------[]表示异常点，0xfd表示此段内存已经被释放。
0x0c063fffbf90: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c063fffbfa0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x0c063fffbfb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa------------------------------------一个shadow字节表示8个字节，共50个0xfd，对应400个字节，也即分配的array大小。
0x0c063fffbfc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c063fffbfd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa //堆的左边界
Heap righ redzone: fb //堆的右边界
Freed Heap region: fd //内存中的堆被释放
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
ASan internal: fe==2708== ABORTING