[llvm-bugs] [Bug 28909] New: __attribute__((noreturn)): Linker error with definition with same mangled name as another definition

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28909

            Bug ID: 28909
           Summary: __attribute__((noreturn)): Linker error with
                    definition with same mangled name as another
                    definition
           Product: clang
           Version: 3.9
          Hardware: PC
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: martongabesz at gmail.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16915
  --> https://llvm.org/bugs/attachment.cgi?id=16915&action=edit
code snipet to reproduce the bug

The above code snippet should compile without any error, but it fails.

void f1(int) __attribute__((noreturn)); // ERROR
//void f1(int) __dead2                  // ERROR
//[[noreturn]] void f1(int);            // OK
void f2(int);

template <typename T>
void Buggy(T t) {}

void test() {
    Buggy(f1);
    Buggy(f2);
}

Comiplie with:
clang++ --std=c++11 -c NoReturnBug.cpp

Produced error message:
NoReturnBug.cpp:7:6: error: definition with same mangled name as another
definition
void Buggy(T t) {}
     ^
NoReturnBug.cpp:7:6: note: previous definition is here
1 error generated.

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