[llvm-bugs] [Bug 26011] New: assertion "Result.isUninit() && "temporary created multiple times"" fails

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26011

            Bug ID: 26011
           Summary: assertion "Result.isUninit() && "temporary created
                    multiple times"" fails
           Product: clang
           Version: 3.7
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++14
          Assignee: unassignedclangbugs at nondot.org
          Reporter: curdeius at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Similar behaviour to bug #17800.
Happens on FreeBSD with -std=c++14 (but not with -std=c++11).
The very simple program declares a boost::lockfree::queue.
I have tested with clang 3.7.0 and clang-devel (which unfortunately dates back
to 20th July 2015) with the same result.

> clang++ -std=c++11 -stdlib=libc++ -lc++ -I./thirdparty/boost ./test.cpp

> clang++ -std=c++14 -stdlib=libc++ -lc++ -I./thirdparty/boost ./test.cpp
Assertion failed: (Result.isUninit() && "temporary created multiple times"),
function createTemporary, file
/wrkdirs/usr/ports/devel/llvm37/work/llvm-3.7.0.src/tools/clang/lib/AST/ExprConstant.cpp,
line 839.
clang-3.7: error: unable to execute command: Abort trap (core dumped)
clang-3.7: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.7.0 (tags/RELEASE_370/final)
Target: x86_64-unknown-freebsd10.1
Thread model: posix

Repro (using Boost 1.60):

```
#include <boost/lockfree/queue.hpp>

struct message {};
static boost::lockfree::queue<message, boost::lockfree::capacity<10>>
a_message_queue;

int main() {}
```

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