qt basic_string上的C ++异常析构函数仅在双击运行时 [英] qt C++ exception on basic_string destructor on double click run only

问题描述

我有以下代码：

  CAtlString str = currentFolder-> whatsThis（）。toStdWString（）。c_str ; 
  

currentFolder是qt QTreeWidgetItem *。
当我运行程序从VS2010它工作确定。但是当我通过双击在同一个文件夹（x64 / Debug或Release）启动程序，我有例外：

 未处理的异常在0x00007ffe2a07572a（ntdll.dll）在test.exe：0xC0000005：访问冲突读取位置0xffffffffffffffff。 
 

在basic_string析构函数中的dealloc上：

 〜basic_string（）// xstring 
 {//销毁字符串
 _Tidy（true）; 
} 
  

// ...

$ b b

  void deallocate（pointer _Ptr，size_type）// in xmemory 
 {// deallocate object at _Ptr，ignore size 
 :: operator delete（_Ptr） ; 
} 
  

我试图直接删除字符串，清除，我有同样的结果。我也试图使用不同的运行时和部署包，没有幸运。 （用Dependency Walker搜索）。
为什么程序在VS2010下工作？
thx！

更新这是最小的代码重现了问题：

I have following code:

CAtlString str = currentFolder->whatsThis().toStdWString().c_str();

currentFolder is qt QTreeWidgetItem*. When I run program from VS2010 it works ok. But when I start program by double click in the same folder (x64/Debug or Release), I have exceptions:

Unhandled exception at 0x00007ffe2a07572a (ntdll.dll) in test.exe: 0xC0000005: Access violation reading location 0xffffffffffffffff.

on dealloc in basic_string destructor:

~basic_string()      // xstring
    {   // destroy the string
    _Tidy(true);
    }

// ...

void deallocate(pointer _Ptr, size_type) // in xmemory
    {   // deallocate object at _Ptr, ignore size
    ::operator delete(_Ptr);
    }

I`m trying to delete string directly, clean, erase - but every time I had the same result. Also I had tried to use different runtimes and deploy packages, without lucky. (searched with Dependency Walker). Why program works under VS2010? And how can I fix standalone running? thx!

Update This is the minimal code reproduced the problem: zalil.ru use x64 config and run program by double click for catch the exception.

Update2 if I keep wstring pointer alive (using temp variable), I have following error:

解决方案

I have found problem solution. As I can understood, on my computer I have mixed installed Qt libraries (3 different versions) and when std::string destructor called, I have UB because wrong runtime called. To solve my problem, I need to avoid using toStdWString/c_str in QString conversions //for example like this auto arr = currentFolder->whatsThis().toUtf8(); std::string temp_str(arr.data()); qDebug() << temp_str.c_str();

or recompile/clean reinstall all libraries that I have used. Its so strange configuration error) There is the page with decision: forum.qt.io

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