Fix quantum bridge infinite update loop (#7558)

Account for quantum bridge nodes not being initialized when neighbor updates trigger multiblock updates.
Stop swallowing exceptions during multiblock updates, since that hid this problem for years, preventing it from being fixed.

---------

Co-authored-by: Sebastian Hartte <shartte@users.noreply.github.com>
(cherry picked from commit 332da22)

src/main/java/appeng/client/guidebook/command/GuidebookStructureCommands.java

@@ -21,6 +21,8 @@
 import org.lwjgl.PointerBuffer;
 import org.lwjgl.system.MemoryStack;
 import org.lwjgl.util.tinyfd.TinyFileDialogs;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.screens.PauseScreen;
@@ -50,6 +52,8 @@
 @OnlyIn(Dist.CLIENT)
 public class GuidebookStructureCommands {
 
+    private static final Logger LOG = LoggerFactory.getLogger(GuidebookStructureCommands.class);
+
     @Nullable
     private static String lastOpenedOrSavedPath;
 
@@ -106,6 +110,7 @@ private static void importStructure(ServerLevel level, BlockPos origin) {
                             try {
                                 compound = NbtUtils.snbtToStructure(textInFile);
                             } catch (CommandSyntaxException e) {
+                                LOG.error("Failed to parse structure.", e);
                                 player.sendSystemMessage(Component.literal(e.toString()));
                                 return null;
                             }
@@ -127,6 +132,7 @@ private static void importStructure(ServerLevel level, BlockPos origin) {
                             player.sendSystemMessage(Component.literal("Placed structure"));
                         }
                     } catch (Exception e) {
+                        LOG.error("Failed to place structure.", e);
                         player.sendSystemMessage(Component.literal(e.toString()));
                     }
 
@@ -212,6 +218,7 @@ private static void exportStructure(ServerLevel level, BlockPos origin, Vec3i si
 
                         player.sendSystemMessage(Component.literal("Saved structure"));
                     } catch (IOException e) {
+                        LOG.error("Failed to save structure.", e);
                         player.sendSystemMessage(Component.literal(e.toString()));
                     }
 

src/main/java/appeng/me/cluster/MBCalculator.java

@@ -27,8 +27,6 @@
 import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.entity.BlockEntity;
 
-import appeng.core.AELog;
-
 public abstract class MBCalculator<TBlockEntity extends IAEMultiBlock<TCluster>, TCluster extends IAECluster> {
 
     /**
@@ -145,8 +143,6 @@ public void calculateMultiblock(ServerLevel level, BlockPos loc) {
                 cluster.updateStatus(updateGrid);
                 return;
             }
-        } catch (Throwable err) {
-            AELog.debug(err);
         } finally {
             setModificationInProgress(null);
         }

src/main/java/appeng/me/cluster/implementations/QuantumCluster.java

@@ -162,11 +162,7 @@ private boolean canUseNode(long qe) {
     }
 
     private boolean isActive() {
-        if (this.isDestroyed || !this.registered) {
-            return false;
-        }
-
-        return this.hasQES();
+        return !this.isDestroyed && this.registered && hasQES() && getNode() != null;
     }
 
     private IGridNode getNode() {