Compiling with GCC 6 (Cmake, C++11 enabled) emits following warning:

[…]/cpputest/src/CppUTest/MemoryLeakWarningPlugin.cpp:312:6: Warnung: the program should also define »void operator delete(void*, std::size_t)« [-Wsized-deallocation]
 void operator delete(void* mem) UT_NOTHROW
      ^~~~~~~~
[…]/cpputest/src/CppUTest/MemoryLeakWarningPlugin.cpp:332:6: Warnung: the program should also define »void operator delete [](void*, std::size_t)« [-Wsized-deallocation]
 void operator delete[](void* mem) UT_NOTHROW
      ^~~~~~~~

About this warning:

-Wsized-deallocation (C++ and Objective-C++ only)
Warn about a definition of an unsized deallocation function

          void operator delete (void *) noexcept;
          void operator delete[] (void *) noexcept;

without a definition of the corresponding sized deallocation function

          void operator delete (void *, std::size_t) noexcept;
          void operator delete[] (void *, std::size_t) noexcept;

or vice versa. Enabled by -Wextra along with -fsized-deallocation. 

Update: Same with C++11 disabled.