bug:越界访问导致ERROR: AddressSanitizer: heap-buffer-overflow on address

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【积土成山】AddressSanitizer: heap-buffer-overflow on address 背景，不同场景，内在原理，参考文献一、背景 1.1 问题背景 1 在做leetcode时，总是会遇到关于“heap-buffer-overflow”的问题； 2 下面对这些场景进行归纳，提出潜在检查点，以及尝试揭示出其内在原理； 1.2 AddressSanitizer 1 快速内存错误检测工具； 2 这里还提供一种方法，进行本地安装和调试； 3 那么在之后如果leetcode不过，然后给出的堆... 阅读详情

==30==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x603000000054 at pc 0x00000040d6e7 bp 0x7fffd87fd2f0 sp 0x7fffd87fd2e8
READ of

越界访问了，注意数组等的边界，len-1

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==30==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x603000000054 at pc 0x00000040d6e7 bp 0x7fffd87fd2f0 sp 0x7fffd87fd2e8
READ of size 4 at 0x603000000054 thread T0
    #1 0x7f96f8e952e0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202e0)

0x603000000054 is located 0 bytes to the right of 20-byte region [0x603000000040,0x603000000054)
allocated by thread T0 here:
    #0 0x7f96fa8bace0 in operator new(unsigned long) (/usr/local/lib64/libasan.so.5+