双重删除会发生什么?

What happens in a double delete?(双重删除会发生什么?)

问题描述

Obj *op = new Obj;
Obj *op2 = op;
delete op;
delete op2; // What happens here?

当您不小心重复删除时，最糟糕的情况是什么?有关系吗?编译器会抛出错误吗?

What's the worst that can happen when you accidentally double delete? Does it matter? Is the compiler going to throw an error?

推荐答案

它会导致未定义的行为.任何事情都可能发生.在实践中，运行时崩溃可能是我所期望的.

It causes undefined behaviour. Anything can happen. In practice, a runtime crash is probably what I'd expect.

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