Building on Qt 5.12 LTS on Windows generates lots of errors

Hey guys!

I'm trying to build my project on Qt 5.12 LTS and I'm getting lots of errors that I wasn't having in 5.9.3. I have tried either the official offline installer and a manually compiled version of Qt but both fails on building. I'm using C++14, maybe could it be a bug on MingW language support? The errors are like the sample below. I have attached the full output as a compressed text file, hope it helps.

In file included from C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/future:39:0,
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtCore/qthread.h:50,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtCore/QtCore:229,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtWidgets/QtWidgetsDepends:3,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include\QtWidgets/QtWidgets:3,}}
{{ from src\baseobjectview.h:28,}}
{{ from src\baseobjectview.cpp:19:}}
C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread: In function 'bool std::operator==(std::thread::id, std::thread::id)':
C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:276:26: error: no match for 'operator==' (operand types are 'std::thread::native_handle_type {aka ptw32_handle_t}' and 'std::thread::native_handle_type {aka ptw32_handle_t}')
{{ return __x._M_thread == __y._M_thread;}}
{{ ~~~~~~~~~~~~~_^~~~~~~~~~~~~~~}}
C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:270:3: note: candidate: bool std::operator==(std::thread::id, std::thread::id)
{{ operator==(thread::id __x, thread::id __y) noexcept}}
{{ ^~~~~~~~}}
C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:270:3: note: no known conversion for argument 1 from 'std::thread::native_handle_type {aka ptw32_handle_t}' to 'std::thread::id'
In file included from C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/memory:81:0,
{{ from C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:39,}}
{{ from C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/future:39,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtCore/qthread.h:50,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtCore/QtCore:229,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtWidgets/QtWidgetsDepends:3,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include\QtWidgets/QtWidgets:3,}}
{{ from src\baseobjectview.h:28,}}
{{ from src\baseobjectview.cpp:19:}}
C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/bits/shared_ptr.h:378:5: note: candidate: template<class _Tp> bool std::operator==(std::nullptr_t, const std::shared_ptr<_Tp>&)
{{ operator==(nullptr_t, const shared_ptr<_Tp>& __a) noexcept}}
{{ ^~~~~~~~}}
C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/bits/shared_ptr.h:378:5: note: template argument deduction/substitution failed:
In file included from C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/future:39:0,
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtCore/qthread.h:50,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtCore/QtCore:229,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include/QtWidgets/QtWidgetsDepends:3,}}
{{ from C:\Qt\Qt5.12.0\5.12.0\mingw73_64\include\QtWidgets/QtWidgets:3,}}
{{ from src\baseobjectview.h:28,}}
{{ from src\baseobjectview.cpp:19:}}
C:/Qt/Qt5.12.0/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:276:33: note: 'std::thread::native_handle_type {aka ptw32_handle_t}' is not derived from 'const std::shared_ptr<_Tp>'
{{ return __x._M_thread == __y._M_thread;}}

If you need more info please let me know.

Thanks in advance.