[llvm-bugs] [Bug 25356] New: False positive with -Wreturn-stack-address and rvalue references

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=25356

            Bug ID: 25356
           Summary: False positive with -Wreturn-stack-address and rvalue
                    references
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: cameronwhite91 at gmail.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org
    Classification: Unclassified

The attached code snippet produces the warning below, which I believe is
incorrect. If the typedef of T is changed to just "int", no error is produced.

------------

test.cc:12:12: warning: returning address of local temporary object
[-Wreturn-stack-address]
    return x;
           ^
test.cc:11:12: note: binding reference variable 'x' here
    auto &&x = foo();
           ^   ~~~~~

------------

typedef int * T;

T foo()
{
    T x = 0;
    return x;
}

T bar()
{
    auto &&x = foo();
    return x;
}

int main(void)
{
    T x = bar();
    return 0;
}

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