https://bugs.llvm.org/show_bug.cgi?id=35119
Bug ID: 35119
Summary: std::set_union accesses an element after it has been
moved out.
Product: libc++
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: denis.yaroshevs...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
std::set_union has this code:
```
*__result = *__first1;
if (!__comp(*__first1, *__first2))
++__first2;
```
It's not ok, since the assignment might have moved the value out.
Suggested fix and test: https://reviews.llvm.org/D39405
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