throw() with clang++ shows possible memory leak

I have a piece of code, which when compiled with g++ does not show any memory leaks. Whereas, the same when compiled with clang++ shows, possible memory leak.

Here's the trace,

==7115==
==7115== HEAP SUMMARY:
==7115==     in use at exit: 16 bytes in 1 blocks
==7115==   total heap usage: 2,324 allocs, 2,323 frees, 2,166,060 bytes allocated
==7115==
==7115== 16 bytes in 1 blocks are still reachable in loss record 1 of 1
==7115==    at 0x4C2BFB9: calloc (vg_replace_malloc.c:762)
==7115==    by 0x4129830: __cxxabiv1::__calloc_with_fallback(unsigned long, unsigned long) (in /opt/xxx/lib64/libc++abi.so.1)
==7115==    by 0x4128946: __cxa_get_globals (in /opt/xxx/lib64/libc++abi.so.1)
==7115==    by 0x412B287: __cxa_throw (in /opt/xxx/lib64/libc++abi.so.1)
==7115==    by 0x4E712AE: Lib::GenCmd::RaiseException(Status, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >) (LibBase.cpp:291)
==7115==
==7115== LEAK SUMMARY:
==7115==    definitely lost: 0 bytes in 0 blocks
==7115==    indirectly lost: 0 bytes in 0 blocks
==7115==      possibly lost: 0 bytes in 0 blocks
==7115==    still reachable: 16 bytes in 1 blocks
==7115==         suppressed: 0 bytes in 0 blocks
==7115==
==7115== For counts of detected and suppressed errors, rerun with: -v

Well, its not possible to share the code snippet, but I can tell you RaiseException() is the function where I have a call made to throw() (at line 291) an exception.

The fact, that no leaks are seen with GCC, but only with Clang makes me think this to be some issue with Clang.

I was navigating through the source for clang, & __cxa_get_globals() is the function where a calloc() call is made. I am not yet sure of the execution flow for clang.

Any idea or any inputs which could confirm this to be a Clang issue & not my code issue?

Here's the clang version I am using. The code is compiled with C++11.

[user~]$ clang --version
clang version 7.1.0
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/local/bin