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TypeError: Cannot read property 'parts' of undefined

See original GitHub issue

MDsveX does not seem to run with Sapper. Have yet to test it with regular svelte. My custom project using it doesn’t work, but works without it. I get the same error with the template: https://github.com/pngwn/sapper-mdsvex-template

Terminal output below:

C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template (master -> origin) (TODO@0.0.1)                                     
λ npm run dev                                                                                                                 
                                                                                                                              
> TODO@0.0.1 dev C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template                                                    
> sapper dev --ext '.svelte .svx'                                                                                             
                                                                                                                              
• client                                                                                                                      
C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\src\node_modules\@sapper\internal\App.svelte                        
'level' is not defined                                                                                                        
22:     <Error {error} {status}/>                                                                                             
23:   {:else}                                                                                                                 
24:     <svelte:component this="{level-Infinity.component}" {...level-Infinity.props}/>                                       
                                 ^                                                                                            
25:   {/if}                                                                                                                   
26: </Layout>                                                                                                                 
C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\src\node_modules\@sapper\internal\App.svelte                        
'level' is not defined                                                                                                        
22:     <Error {error} {status}/>                                                                                             
23:   {:else}                                                                                                                 
24:     <svelte:component this="{level-Infinity.component}" {...level-Infinity.props}/>                                       
                                                                ^                                                             
25:   {/if}                                                                                                                   
26: </Layout>                                                                                                                 
• server                                                                                                                      
C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\src\node_modules\@sapper\internal\App.svelte                        
'level' is not defined                                                                                                        
22:     <Error {error} {status}/>                                                                                             
23:   {:else}                                                                                                                 
24:     <svelte:component this="{level-Infinity.component}" {...level-Infinity.props}/>                                       
                                 ^                                                                                            
25:   {/if}                                                                                                                   
26: </Layout>                                                                                                                 
C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\src\node_modules\@sapper\internal\App.svelte                        
'level' is not defined                                                                                                        
22:     <Error {error} {status}/>                                                                                             
23:   {:else}                                                                                                                 
24:     <svelte:component this="{level-Infinity.component}" {...level-Infinity.props}/>                                       
                                                                ^                                                             
25:   {/if}                                                                                                                   
26: </Layout>                                                                                                                 
✔ service worker (77ms)                                                                                                       
> Listening on http://localhost:3000                                                                                          
(node:1856) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'parts' of undefined                            
    at handle_page (C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:2819:23)        
    at Array.find_route (C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:3103:4)    
    at nth_handler (C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:3224:14)        
    at C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:3224:31                      
    at Array.find_route (C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:699:3)     
    at nth_handler (C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:3224:14)        
    at C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:3224:31                      
    at Array.<anonymous> (C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:3279:4)   
    at nth_handler (C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:3224:14)        
    at C:\Users\EmNudge\Workspace\garbage\sapper-mdsvex-template\__sapper__\dev\server\server.js:3224:31