more error reporting

wikizimmer.js

@@ -1289,7 +1289,7 @@ async function core ( samplePage ) {
         UserAgent = command.userAgent == 'firefox' ? UserAgentFirefox : command.userAgent
     }
     log( 'UserAgent', UserAgent )
-
+    try {
         await loadPreRequisites( )
 
         const sampleDom = await processSamplePage( samplePage, command.rmdir )
@@ -1305,7 +1305,9 @@ async function core ( samplePage ) {
         await closeMetadataStorage()
 
         await oldDir.done
-    //~ .catch( err => log( err )) // handleError
+    } catch ( err ) {
+        fatal( 'core', err ) // handleError
+    }
 }
 
 function main () {