https://llvm.org/bugs/show_bug.cgi?id=31489
Bug ID: 31489
Summary: SEGV when swapping two std:function's at the same
location
Product: libc++
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: zonrx...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
Classification: Unclassified
This can be reproduced easily with the following program and commannds:
$ cat a.cpp
#include <algorithm>
#include <functional>
#include <iostream>
#include <vector>
int main() {
std::function<void()> a = []() {};
std::swap(a, a);
return 0;
}
$ clang++ -ggdb -std=c++11 -o a a.cpp
$ ./a
Segmentation fault: 11
$ lldb ./a
(lldb) target create "./a"
Current executable set to './a' (x86_64).
(lldb) r
...
1780 __f_->__clone(__t);
1781 __f_->destroy();
1782 __f_ = 0;
-> 1783 __f.__f_->__clone((__base*)&__buf_);
1784 __f.__f_->destroy();
1785 __f.__f_ = 0;
1786 __f_ = (__base*)&__buf_;
Both Mac (Apple LLVM version 8.0.0) and Linux (LLVM/Clang 3.8.0 release) have
the same problem at the same line.
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