Summary: 
I can’t destroy it(as a finished building) or erase(as a plan). That means it’s a building and a plan simultaneously. Like a Schrödinger’s cat. But it’s a roof. Funny. 
[
sorry for my English  ]
Steps to reproduce: 
I don’t really know, I was just buliding a house with a roof.
Notes: 
Attachments: 
Version Number and Mods in use: 
release-860(x64)[M]. No mods.
System Information: 
             
            
              2 Likes 
            
                
            
           
          
            
            
              if you could share the savefile this is in, im sure the devs would like to take a look at it 
             
            
              
            
           
          
            
            
              Another bug: I tried to save this roof as template, but the game crashed. The save file has been corrupted after crash.  
             
            
              
            
           
          
            
            
              Meh, I’ll try to recreate  this bug.
             
            
              
            
           
          
            
            
              That way madness lies 
             
            
              
            
           
          
            
              
                Yohane  
              
                  
                    June 15, 2018,  6:36am
                   
                  6 
               
             
            
              Summary: 
Steps to reproduce: 
Build house with roof 
use gum to erase the roof (or ctrl Z) 
  
Expected Results: 
Actual Results: 
Notes: 
Attachments: 
Version Number and Mods in use: 
System Information: 
             
            
              
            
           
          
            
            
              The same problem, man 
             
            
              
            
           
          
            
              
                Relyss  
              
                  
                    June 28, 2018,  7:44pm
                   
                  8 
               
             
            
              
Build house with roof 
use gum to erase the roof (or ctrl Z) 
 
 
 
With “build” do you refer to “design” / “draw”, or actually “build”?
We don’t support editing buildings after they’ve been built, only moving/replacing furniture but the original will still show in the blueprint.
Was this roof made with the roof tool, or with the blocks tool?
Can’t reproduce this on r866.