QtCreator + CMake on Windows: App crushes with "The CDB process terminated" error

psi-1

I have a simple HelloWorld application with shared library. A library contains class Greeter which provides "Hello, World!" string. Main window takes this string from the library and places it in QLabel. Everything works fine until I place all library code in subdirectory and use "add_subdirectory" in cmake to put the library in my project. Then my app crushes without even entering main() function with "The CDB process terminated" error. Here is the code:

# CMakeLists.txt:
cmake_minimum_required(VERSION 3.1.0)

project(HelloWorld)

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTOUIC ON)

find_package(Qt5Widgets CONFIG REQUIRED)

add_subdirectory(Greeter ${CMAKE_BINARY_DIR}/Greeter/)

add_executable(HelloWorld WIN32 main.cpp mainwindow.h mainwindow.cpp mainwindow.ui)
target_link_libraries(HelloWorld Qt5::Widgets Greeter)

add_dependencies(HelloWorld Greeter)

# Greeter/CMakeLists.txt:
cmake_minimum_required(VERSION 3.1.0)

project(Greeter)

add_library(Greeter SHARED Greeter.h Greeter.cpp)
target_link_libraries(Greeter Qt5::Core)

C++ code is trivial. Maybe Greeter.h is worth reciting:

#include <QString>

struct __declspec(dllexport) Greeter
{
    explicit Greeter() = default;
    QString Greet();
};

I use MSVC compiler and debugger. I tried to update Visual Studio, delete build folder, delete .user file, and I still can't make it work.