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

Question

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++;  
}

我以 3 种方式构建它：

1. g++ -g -o main1 ../main1.cpp
2. g++ -g -o main1 -O1 ../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) 时，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:

这是我的 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？为什么会抛出异常？

Answer 1

您可以通过禁用有问题的漂亮打印机来防止此异常。请参阅“帮助禁用漂亮打印机”。