Double loop foreach laravel 5.5 blade - php

Question

Tying to access item tables in first loop and values of the 2nd loop in a select in laravel. How do i do this? I get an error:
Trying to get property 'unit_abb' of non-object (View: C:\xampp\htdocs\ein\IPPS\resources\views\pr-items.blade.php)
Here is my code:
pr-items.blade
#foreach($list as $indexKey => $list)
<form class="form-horizontal" role="form" method="POST" action="{{ url('/update_items',$list->id) }}" autocomplete="off" >
{{ csrf_field() }}
{{ method_field('PATCH') }}
<input type="hidden" value="{{$list->pr_form_number}}" name='prlist' id='prlist'>
<tr>
<th>
</th>
<td>
<input type="text" class="form-control custom-border input-sm" value="{{$list->pr_qty}}" name="qtylist" id="qtylist" >
</td>
<td>
<select id="department" type="text" class="form-control custom-border input-sm" name="unitlist" id="unitlist">
#foreach ($units as $key => $newunit)
#if ($loop->parent->first)
<option value="{{$newunit->unit_abb}}" #if($newunit->unit_abb == $list->pr_unit) selected #endif>{{$newunit->unit_name}}</option>
#endif
#endforeach
</select>
</td>
<td>
<input type="text" class="form-control custom-border input-sm" value="{{$list->pr_description}}" name="descriptionlist" id="descriptionlist" >
</td>
<td>
<input type="text" class="form-control custom-border input-sm money-inp" value="{{$list->pr_cost_per_unit}}" name="cpulist" id="cpulist">
</td>
<td>
<input type="text" class="form-control custom-border input-sm money-inp" value="{{$list->pr_estimated_cost}}" disabled>
</td>
<td class="text-center">
<button type="submit" class="btn btn-warning btn-sm glyphicon glyphicon-pencil"></button>
<a class="btn btn-danger btn-sm glyphicon glyphicon-minus" href="{{route('pr.delete',$list->id)}}"></a>
</td>
</tr>
</form>
#endforeach