check for connectedness in mapgen

src/mapgen.ts

@@ -168,7 +168,7 @@ export function generateMap(): LoadedNewMap {
       if (e instanceof BadMapError) {
         console.log(`Bad map generated: ${e.message}:`);
         showDebug(e.badMap);
-        continue;
+        // continue;
       }
       throw e;
     }
@@ -604,6 +604,11 @@ function connectRegions(knife: Knife) {
     connectors = connectors2;
   }
   knife.showDebug(merged);
+
+  // The map should now be fully connected.
+  if (!knife.map.isConnected()) {
+    throw new BadMapError("unconnected", knife.map);
+  }
 }
 
 function growMaze(knife: Knife, start: Point) {