error: definition of implicit copy constructor for 'app' is deprecated (OSX)

[ClausKlein]

Expected Behavior

No errors and no warnings

Actual Behavior

bash-3.2$ cmake -B build -G Ninja  
CMake Deprecation Warning at CMakeLists.txt:7 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- The CXX compiler identification is AppleClang 13.1.6.13160021
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/clausklein/Workspace/cpp/boost-ext/di/build
bash-3.2$ cd build
bash-3.2$ ninja
[200/314] Building CXX object example/CMakeFiles/example.bindings.dir/bindings.cpp.o
FAILED: example/CMakeFiles/example.bindings.dir/bindings.cpp.o 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++  -I/Users/clausklein/Workspace/cpp/boost-ext/di/example/.. -I/Users/clausklein/Workspace/cpp/boost-ext/di/include -I/Users/clausklein/Workspace/cpp/boost-ext/di/extension/include -std=c++1y -fno-exceptions -pedantic -pedantic-errors -Wall -Wextra -Werror -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk -MD -MT example/CMakeFiles/example.bindings.dir/bindings.cpp.o -MF example/CMakeFiles/example.bindings.dir/bindings.cpp.o.d -o example/CMakeFiles/example.bindings.dir/bindings.cpp.o -c /Users/clausklein/Workspace/cpp/boost-ext/di/example/bindings.cpp
/Users/clausklein/Workspace/cpp/boost-ext/di/example/bindings.cpp:58:8: error: definition of implicit copy constructor for 'app' is deprecated because it has a user-declared copy assignment operator [-Werror,-Wdeprecated-copy]
  app& operator=(const app&) = delete;
       ^
/Users/clausklein/Workspace/cpp/boost-ext/di/example/bindings.cpp:88:22: note: in implicit copy constructor for 'app' first required here
  auto service_app = injector.create<app>();
                     ^
1 error generated.
[213/314] Building CXX object test/CMakeFiles/test.ft_di_bind.dir/ft/di_bind.cpp.o
ninja: build stopped: subcommand failed.
bash-3.2$ git status
On branch cpp14
Your branch is up to date with 'origin/cpp14'.
bash-3.2$

Specifications

• Version: HEAD -> cpp14
• Platform: OSX
• Subsystem: