Queues throwing an assertion error on test servers

[TheLimeGlass]

Skript/Server Version

[12:50:51 INFO]: [Skript] Skript's aliases can be found here: https://github.com/SkriptLang/skript-aliases
[12:50:51 INFO]: [Skript] Skript's documentation can be found here: https://docs.skriptlang.org/
[12:50:51 INFO]: [Skript] Skript's tutorials can be found here: https://docs.skriptlang.org/tutorials
[12:50:51 INFO]: [Skript] Server Version: 1.21.4-120-30046e0 (MC: 1.21.4)
[12:50:51 INFO]: [Skript] Skript Version: 2.10.0-nightly-f5d91923f (skriptlang-nightly)
[12:50:51 INFO]: [Skript] Installed Skript Addons: None
[12:50:51 INFO]: [Skript] Installed dependencies: None

Bug Description

[12:42:38 INFO]: Stopping server
[12:42:38 INFO]: [Skript] Disabling Skript v2.10.0-nightly-f5d91923f
[12:42:38 ERROR]: Error occurred while disabling Skript v2.10.0-nightly-f5d91923f
java.lang.AssertionError: [Welcome to my server!, All furniture, 5% off in store and online!, Discount sale on christmas trees!, Vote for [candidate name]!] (class org.skriptlang.skript.lang.util.SkriptQueue) != [] (class org.skriptlang.skript.lang.util.SkriptQueue): [89, 103, 103, 0, 0, 1, -128, 5, 113, 117, 101, 117, 101, -128]
        at Skript.jar/ch.njol.skript.registrations.Classes.serialize(Classes.java:762) ~[Skript.jar:?]
        at Skript.jar/ch.njol.skript.variables.FlatFileStorage.save(FlatFileStorage.java:480) ~[Skript.jar:?]
        at Skript.jar/ch.njol.skript.variables.FlatFileStorage.saveVariables(FlatFileStorage.java:418) ~[Skript.jar:?]
        at Skript.jar/ch.njol.skript.variables.FlatFileStorage.close(FlatFileStorage.java:328) ~[Skript.jar:?]
        at Skript.jar/ch.njol.skript.Skript.onDisable(Skript.java:1283) ~[Skript.jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:290) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:237) ~[paper-1.21.4.jar:1.21.4-120-30046e0]
        at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugins(PaperPluginInstanceManager.java:161) ~[paper-1.21.4.jar:1.21.4-120-30046e0]
        at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugins(PaperPluginManagerImpl.java:97) ~[paper-1.21.4.jar:1.21.4-120-30046e0]
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:541) ~[paper-api-1.21.4-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.CraftServer.disablePlugins(CraftServer.java:625) ~[paper-1.21.4.jar:1.21.4-120-30046e0]
        at net.minecraft.server.MinecraftServer.stopServer(MinecraftServer.java:1007) ~[paper-1.21.4.jar:1.21.4-120-30046e0]
        at net.minecraft.server.dedicated.DedicatedServer.stopServer(DedicatedServer.java:755) ~[paper-1.21.4.jar:1.21.4-120-30046e0]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1294) ~[paper-1.21.4.jar:1.21.4-120-30046e0]
        at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:310) ~[paper-1.21.4.jar:1.21.4-120-30046e0]
        at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]

Expected Behavior

To not throw an assertion error when stopping the server

Steps to Reproduce

Run a quick test

Agreement

• I have read the guidelines above and affirm I am following them with this report.

[Moderocky]

This was already recorded in #7456, there is already a fix available in #7455.