C++ range based for loop gives SIGABRT while normal loop works fine

this code works fine:

for (int i = 0; i < grid.size(); i++)
    painter.drawRect(grid[i].rect);

this code does not work:

for (Square square : grid)
    painter.drawRect(square.rect);

It fails at runtime printing:

terminate called after throwing an instance of 'std::bad_alloc'
what():  std::bad_alloc
The program has unexpectedly finished.

This is the call stack:

1  raise
0x7ffff53cf91f 
2  abort
0x7ffff53d151a 
3  __gnu_cxx::__verbose_terminate_handler()
0x7ffff5f3f52d 
4  ??
0x7ffff5f3d2d6 
5  std::terminate()
0x7ffff5f3d321 
6  __cxa_throw
0x7ffff5f3d539 
7  operator new(unsigned long)
0x7ffff5f3dafc 
8  __gnu_cxx::new_allocator<Square>::allocate
new_allocator.h 104 0x408548       
9  std::allocator_traits<std::allocator<Square>>::allocate
alloc_traits.h  416 0x408308       
10 std::_Vector_base<Square, std::allocator<Square>>::_M_allocate
stl_vector.h    170 0x407f54       
11 std::_Vector_base<Square, std::allocator<Square>>::_M_create_storage
stl_vector.h    185 0x407b99       
12 std::_Vector_base<Square, std::allocator<Square>>::_Vector_base stl_vector.h    136 0x4078f3       
13 std::vector<Square>::vector
stl_vector.h    322 0x4075c3       
14 Square::Square
square.h        19  0x407406       
15 Canvas::Canvas
canvas.cpp      23  0x406752       
16 MainWindow::MainWindow
mainwindow.cpp  10  0x4044b6
main.cpp        7   0x404310       

The problem happens at canvas.cpp

Kindly shed some light as to what might be the causing this issue.