don't cause exception on main thread if a movement becomes impossible

src/main/java/baritone/pathing/calc/AbstractNodeCostSearch.java

@@ -147,7 +147,12 @@ public abstract class AbstractNodeCostSearch implements IPathFinder {
 
     @Override
     public Optional<IPath> pathToMostRecentNodeConsidered() {
+        try {
             return Optional.ofNullable(mostRecentConsidered).map(node -> new Path(startNode, node, 0, goal));
+        } catch (IllegalStateException ex) {
+            System.out.println("Unable to construct path to render");
+            return Optional.empty();
+        }
     }
 
     protected int mapSize() {
@@ -164,7 +169,12 @@ public abstract class AbstractNodeCostSearch implements IPathFinder {
                 continue;
             }
             if (getDistFromStartSq(bestSoFar[i]) > MIN_DIST_PATH * MIN_DIST_PATH) { // square the comparison since distFromStartSq is squared
+                try {
                     return Optional.of(new Path(startNode, bestSoFar[i], 0, goal));
+                } catch (IllegalStateException ex) {
+                    System.out.println("Unable to construct path to render");
+                    return Optional.empty();
+                }
             }
         }
         // instead of returning bestSoFar[0], be less misleading

src/main/java/baritone/pathing/calc/Path.java

@@ -107,6 +107,7 @@ class Path implements IPath {
                 return move;
             }
         }
+        // leave this as IllegalStateException; it's caught in AbstractNodeCostSearch
         throw new IllegalStateException("Movement became impossible during calculation " + src + " " + dest + " " + dest.subtract(src));
     }