1
我检查时很卡与此恼人的段错误,如果一个指针是0。这是有问题的代码:断言(指针)提高分段违例
bool egammaMVACalib::checkTree()
{
// Not a TChain
cout << "a" << endl;
assert(m_tree); // crash on line 751 (this one)
cout << "B" << endl;
m_tree
是类型的egammaMVACalib
数据成员TTree*
所以我真的不明白为什么assert(m_tree)
可以引发分割违规。这与堆栈输出跟踪
a
19:07:25 30574 Wrk-0.9 | *** Break ***: segmentation violation
===========================================================
There was a crash.
This is the entire stack trace of all threads:
===========================================================
#0 0x000000361869a4d5 in waitpid() from /lib64/libc.so.6
#1 0x000000361863c481 in do_system() from /lib64/libc.so.6
#2 0x00002ac5099cb322 in TUnixSystem::StackTrace()()
from /usr/local/proof/root/lib/libCore.so
#3 0x00002ac5099c7fea in TUnixSystem::DispatchSignals(ESignals)()
from /usr/local/proof/root/lib/libCore.so
#4 <signal handler called>
#5 egammaMVACalib::checkTree (this=0x0) at ../Root/egammaMVACalib.cxx:751
#6 0x00002ac5117e5563 in egammaMVACalib::LoadVariables (this=0x1, index=0)
at ../Root/egammaMVACalib.cxx:492
我是在MEM转储盯着有不知道是什么意思,然后你来了,闪耀行,其中之前没有。谢谢。 –
好,但现在,它怎么可能?程序如何用'this == 0'调用对象的方法? (它不是一个静态方法) –
我知道这看起来很奇怪,但方法调用与数据处于不同的空间,并且可以链接到一个代码中,以便知道如何调用该方法 - 我知道这似乎很奇怪,但我已经有了很多。 – Julian