SPIGOT-5428: Better handling of some ItemMeta

src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBanner.java

@@ -53,7 +53,12 @@ public class CraftMetaBanner extends CraftMetaItem implements BannerMeta {
             NBTTagList patterns = entityTag.getList(PATTERNS.NBT, CraftMagicNumbers.NBT.TAG_COMPOUND);
             for (int i = 0; i < Math.min(patterns.size(), 20); i++) {
                 NBTTagCompound p = patterns.getCompound(i);
-                this.patterns.add(new Pattern(DyeColor.getByWoolData((byte) p.getInt(COLOR.NBT)), PatternType.getByIdentifier(p.getString(PATTERN.NBT))));
+                DyeColor color = DyeColor.getByWoolData((byte) p.getInt(COLOR.NBT));
+                PatternType pattern = PatternType.getByIdentifier(p.getString(PATTERN.NBT));
+
+                if (color != null && pattern != null) {
+                    this.patterns.add(new Pattern(color, pattern));
+                }
             }
         }
     }

src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaCharge.java

@@ -33,7 +33,11 @@ class CraftMetaCharge extends CraftMetaItem implements FireworkEffectMeta {
         super(tag);
 
         if (tag.hasKey(EXPLOSION.NBT)) {
+            try {
                 effect = CraftMetaFirework.getEffect(tag.getCompound(EXPLOSION.NBT));
+            } catch (IllegalArgumentException ex) {
+                // Ignore invalid effects
+            }
         }
     }
 

src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaMap.java

@@ -63,7 +63,11 @@ class CraftMetaMap extends CraftMetaItem implements MapMeta {
             }
 
             if (display.hasKey(MAP_COLOR.NBT)) {
+                try {
                     color = Color.fromRGB(display.getInt(MAP_COLOR.NBT));
+                } catch (IllegalArgumentException ex) {
+                    // Invalid colour
+                }
             }
         }
     }

src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaPotion.java

@@ -58,7 +58,11 @@ class CraftMetaPotion extends CraftMetaItem implements PotionMeta {
             type = CraftPotionUtil.toBukkit(tag.getString(DEFAULT_POTION.NBT));
         }
         if (tag.hasKey(POTION_COLOR.NBT)) {
+            try {
                 color = Color.fromRGB(tag.getInt(POTION_COLOR.NBT));
+            } catch (IllegalArgumentException ex) {
+                // Invalid colour
+            }
         }
         if (tag.hasKey(POTION_EFFECTS.NBT)) {
             NBTTagList list = tag.getList(POTION_EFFECTS.NBT, CraftMagicNumbers.NBT.TAG_COMPOUND);