[LLVMbugs] [Bug 23602] New: clang++ fails to compile libstdc++ debug/vector with -D_GLIBCXX_DEBUG -std=c++11

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23602

            Bug ID: 23602
           Summary: clang++ fails to compile libstdc++ debug/vector with
                    -D_GLIBCXX_DEBUG -std=c++11
           Product: clang
           Version: trunk
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: adam at spicenitz.org
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

clang version 3.7.0 (trunk 233105)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/5.1.1
Selected GCC installation: /usr/lib/gcc/x86_64-redhat-linux/5.1.1
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64

Version of libstdc++:
libstdc++-devel-5.1.1-1.fc22.x86_64


Sample code:

#include <vector>

int main() {
  const std::vector<int> empty_ints;

  return empty_ints.size();
}



$ clang++ -D_GLIBCXX_DEBUG -std=c++11 c.cpp 
c.cpp:4:26: error: default initialization of an object of const type 'const
std::vector<int>' without a user-provided default constructor
  const std::vector<int> empty_ints;
                         ^
c.cpp:4:36: note: add an explicit initializer to initialize 'empty_ints'
  const std::vector<int> empty_ints;
                                   ^
                                   {}
1 error generated.



This error does not occur if I leave out either -D_GLIBCXX_DEBUG or -std=c++11.
This also works correctly with g++ 5.1.1.

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