Python异常:在调试支持stl的c++代码时，索引超出范围

Python Exception: index out of range while debuging the code c++ with support for stl with gdb

本文关键字：代码 索引 范围 c++ 异常 调试 stl 支持 Python      更新时间：2023-10-16
我有一个代码: 
#include <list>
int f(std::list<int>& l)
{
    l.clear();
    int i = 0;
    return i;
}
int main(int argc, char* argv[])
{
    std::list<int> l;
    int i = f(l);
    i++;  
}

我用三种方法构建它:

  1. g++ -g -o main1./main1.cpp
  2. g++ -g -o main1 - 01 ./main1.cpp
  3. g++ -g -o main1 -O2 ./main1.cpp

我用gdb (GNU gdb (gdb) 7.5.1)调试它，当我进入int f(std::list&l)我得到这样的输出:

Python Exception <type 'exceptions.IndexError'> list index out of range:
(gdb) Python Exception <type 'exceptions.IndexError'> list index out of range:
下面是我的gdb会话: 
(gdb) bre main
Breakpoint 1 at 0x400603: file ../main1.cpp, line 11.
(gdb) r
Starting program: /home/mhd/Texts/Programming/Programms/Exercises/Linux/BruceMolayUnixLinux/Exercises/2/Head/Debug/main1 
warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff7ffa000
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
(gdb) n
(gdb) n
(gdb) s
Python Exception <type 'exceptions.IndexError'> list index out of range: 
(gdb) Python Exception <type 'exceptions.IndexError'> list index out of range: 
q
Debugger finished

如何防止此异常?为什么要抛出异常?

您可以通过禁用有问题的漂亮打印机来防止此异常。

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