QT 5.15: Creating a QPushButton crashes a program - c++

Question

Using latest QT 5.15.0, c++20, cmake 3.17, MSVC 16.7.2
I have a simple QWidget: (all necessary includes defined in precompiled header)
widget.h
#pragma once
#ifndef _WIDGET_H_209323
#define _WIDGET_H_209323
class TestWidget: public QWidget {
Q_OBJECT
public:
explicit TestWidget(QWidget* parent = nullptr);
private:
QVBoxLayout* side_panel_;
private:
auto init_elements() -> void;
};
#endif
widget.cpp:
#include "widget.h"
TestWidget::TestWidget(QWidget* parent) : QWidget(parent) {
init_elements();
}
auto TestWidget::init_elements() -> void {
auto init_main_panel = [this]() {
side_panel_ = new QVBoxLayout();
QPushButton* main_view = new QPushButton("test");
side_panel_->addWidget(main_view);
};
init_main_panel();
this->setLayout(side_panel_);
}
The program compiles fine, but crashes at startup with Process finished with exit code -1073741511 (0xC0000139) and nothing else.
Changing QPushButton to any other widget, for example
QLabel* label = new QLabel(this);
label->setText("test");
side_panel_->addWidget(label);
works as expected, without any problems.
Actually just adding widget.h with QPushButton to CMakeLists.txt add_target, without including it in any other project files crashes the program at startup.
UPDATE:
Tried loading project into Visual Studio and got more meaningful error:
The procedure entry point
?hitButton#QPushButton##MEBA_NAEBVQPoint###Z
could not be located int the dynamic link library
UPDATE 2:
Changing QT version to 5.14.2 fixes this issue. Both versions installed as MSVC precompiled 64-bit (MSVC2017 for 5.14 and MSVC2019 for 5.15) from official QT installer.