重新发一贴，关于上一篇 C++ 代码中，结构体析构导致内存异常的问题，我做了更多的测试

结构体定义：

struct ModuleConfig
{
	ModuleConfig()
	{
		printf("ModuleConfig::constructor\n");
	}
	~ModuleConfig()
	{
		printf("ModuleConfig::destructor\n");
	}
	
	uint32_t identity;
	std::string pdoMapName;
	uint32_t pdoMapInOffset;
	uint32_t pdoMapOutOffset;
};

调用并崩溃的代码：

void ESI_SetModuleIdentities(int slaveId, std::vector<uint32_t>& moduleIdentities)
{
	
	ModuleConfig* newModule = new ModuleConfig;
	printf("line: %d\n", __LINE__); // 917
	newModule->identity = 243423;
	printf("EEEEE %d\n", newModule->identity);
	delete newModule;
	printf("line: %d\n", __LINE__); // 921
	newModule = NULL;
	printf("line: %d\n", __LINE__); // 923

	SlaveFileConfig* config = database[slaveId];
	config->SetModuleIdentities(moduleIdentities);
}

直接运行后的打印输出：

ModuleConfig::constructor
line: 917
EEEEE 243423
ModuleConfig::destructor

（只有这么多，打完这些就崩溃）

使用 valgrind 调试，相关信息如下：

ModuleConfig::constructor
line: 917
EEEEE 243423
ModuleConfig::destructor
==8820== Conditional jump or move depends on uninitialised value(s)
==8820==    at 0x49D65CE: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string() (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.28)
==8820==    by 0x170615: ModuleConfig::~ModuleConfig() (SlaveConfigParser.h:26)
==8820==    by 0x17F992: ESI_SetModuleIdentities(int, std::vector<unsigned int, std::allocator<unsigned int> >&) (SlaveConfigParser.cpp:920)
==8820==    by 0x161637: EcatAdapter::InitSlaveFileConfig() (EcatAdapter.cpp:1321)
==8820==    by 0x15F583: EcatAdapter::ConfigSlaves() (EcatAdapter.cpp:762)
==8820==    by 0x15DB78: EcatAdapter::Connect() (EcatAdapter.cpp:247)
==8820==    by 0x15C4D4: AdapterManager::Connect() (AdapterManager.cpp:250)
==8820==    by 0x15C0F6: AdapterManager::Run() (AdapterManager.cpp:151)
==8820==    by 0x15CA7F: StartAdapter (CExport.cpp:22)
==8820==    by 0x18F8CA: main (main.c:5)
==8820==  Uninitialised value was created by a heap allocation
==8820==    at 0x483BE63: operator new(unsigned long) (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==8820==    by 0x17F939: ESI_SetModuleIdentities(int, std::vector<unsigned int, std::allocator<unsigned int> >&) (SlaveConfigParser.cpp:916)
==8820==    by 0x161637: EcatAdapter::InitSlaveFileConfig() (EcatAdapter.cpp:1321)
==8820==    by 0x15F583: EcatAdapter::ConfigSlaves() (EcatAdapter.cpp:762)
==8820==    by 0x15DB78: EcatAdapter::Connect() (EcatAdapter.cpp:247)
==8820==    by 0x15C4D4: AdapterManager::Connect() (AdapterManager.cpp:250)
==8820==    by 0x15C0F6: AdapterManager::Run() (AdapterManager.cpp:151)
==8820==    by 0x15CA7F: StartAdapter (CExport.cpp:22)
==8820==    by 0x18F8CA: main (main.c:5)
==8820== 
==8820== Conditional jump or move depends on uninitialised value(s)
==8820==    at 0x483CF75: operator delete(void*) (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==8820==    by 0x170615: ModuleConfig::~ModuleConfig() (SlaveConfigParser.h:26)
==8820==    by 0x17F992: ESI_SetModuleIdentities(int, std::vector<unsigned int, std::allocator<unsigned int> >&) (SlaveConfigParser.cpp:920)
==8820==    by 0x161637: EcatAdapter::InitSlaveFileConfig() (EcatAdapter.cpp:1321)
==8820==    by 0x15F583: EcatAdapter::ConfigSlaves() (EcatAdapter.cpp:762)
==8820==    by 0x15DB78: EcatAdapter::Connect() (EcatAdapter.cpp:247)
==8820==    by 0x15C4D4: AdapterManager::Connect() (AdapterManager.cpp:250)
==8820==    by 0x15C0F6: AdapterManager::Run() (AdapterManager.cpp:151)
==8820==    by 0x15CA7F: StartAdapter (CExport.cpp:22)
==8820==    by 0x18F8CA: main (main.c:5)
==8820==  Uninitialised value was created by a heap allocation
==8820==    at 0x483BE63: operator new(unsigned long) (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==8820==    by 0x17F939: ESI_SetModuleIdentities(int, std::vector<unsigned int, std::allocator<unsigned int> >&) (SlaveConfigParser.cpp:916)
==8820==    by 0x161637: EcatAdapter::InitSlaveFileConfig() (EcatAdapter.cpp:1321)
==8820==    by 0x15F583: EcatAdapter::ConfigSlaves() (EcatAdapter.cpp:762)
==8820==    by 0x15DB78: EcatAdapter::Connect() (EcatAdapter.cpp:247)
==8820==    by 0x15C4D4: AdapterManager::Connect() (AdapterManager.cpp:250)
==8820==    by 0x15C0F6: AdapterManager::Run() (AdapterManager.cpp:151)
==8820==    by 0x15CA7F: StartAdapter (CExport.cpp:22)
==8820==    by 0x18F8CA: main (main.c:5)
==8820== 
==8820== Invalid free() / delete / delete[] / realloc()
==8820==    at 0x483CFBF: operator delete(void*) (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==8820==    by 0x170615: ModuleConfig::~ModuleConfig() (SlaveConfigParser.h:26)
==8820==    by 0x17F992: ESI_SetModuleIdentities(int, std::vector<unsigned int, std::allocator<unsigned int> >&) (SlaveConfigParser.cpp:920)
==8820==    by 0x161637: EcatAdapter::InitSlaveFileConfig() (EcatAdapter.cpp:1321)
==8820==    by 0x15F583: EcatAdapter::ConfigSlaves() (EcatAdapter.cpp:762)
==8820==    by 0x15DB78: EcatAdapter::Connect() (EcatAdapter.cpp:247)
==8820==    by 0x15C4D4: AdapterManager::Connect() (AdapterManager.cpp:250)
==8820==    by 0x15C0F6: AdapterManager::Run() (AdapterManager.cpp:151)
==8820==    by 0x15CA7F: StartAdapter (CExport.cpp:22)
==8820==    by 0x18F8CA: main (main.c:5)
==8820==  Address 0x4ff42e800000000 is not stack'd, malloc'd or (recently) free'd
==8820== 
line: 921
line: 923

环境：g++ 9.4.0 / Ubuntu 20.04 / c++11

把 std::string pdoMapName 改成 std::string pdoMapName{} 也不行