NPE - megamek.common.Entity.setUnitNumber(short)

[HammerGS]

Prerequisites and Pre-Issue Checklist

• I'm reporting the issue to the correct repository:

• MegaMek

• MegaMekLab

• MekHQ

• I've tested the issue against at least the latest MILESTONE version

• I've asked on the MegaMek Discord about the error

• I've reviewed the BattleTech rules and MegaMek documentation, and I've confirmed that something isn't working as intended.

• I've searched the Github tracker and haven't found the issue listed

Severity *

High (Major Disruption): A major feature is broken or incorrect, but a workaround exists.

Brief Description *

17:53:34,945 ERROR [megamek.MegaMek] {Packet Pump}
megamek.MegaMek.lambda$main$1(MegaMek.java:95) - Uncaught java.lang.NullPointerException detected. Please open up an issue containing all logs, the game save file, and customs at https://github.com/MegaMek/megamek/issues . If Sentry is enabled, the error has also been logged.
java.lang.NullPointerException: Cannot invoke "megamek.common.Entity.setUnitNumber(short)" because "lastUnitMember" is null
	at megamek.server.totalwarfare.TWGameManager.receiveEntityDelete(TWGameManager.java:26886)
	at megamek.server.totalwarfare.TWGameManager.handlePacket(TWGameManager.java:726)
	at megamek.server.Server.handle(Server.java:1330)
	at megamek.server.Server$PacketPump.run(Server.java:138)
	at java.base/java.lang.Thread.run(Thread.java:833)

Steps to Reproduce

Supernova Alpha.zip
Use the attached MUL in the lobby remove more than 5 Protomeks and you'll get the NPE

megamek.MegaMek.initializeLogging(MegaMek.java:146) - Starting MegaMek v0.50.2-SNAPSHOT
    Build Date: N/A
    Today: 2024-11-21
    Origin Project: MegaMek
    Java Vendor: Oracle Corporation
    Java Version: 17.0.6
    Platform: Windows 11 10.0 (amd64)
    System Locale: en_CA
    Total memory available to MegaMek: 4 GB
    MM Code Revision: Unknown
    MML Code Revision: Unknown
    MHQ Code Revision: Unknown

Operating System *

Windows 11

Java Version *

Java 17

MegaMek Suite Version *

Free Text (type manually)

Custom MegaMek Version

50.02

Attach Files

Supernova Alpha.zip
megamek.log

Final Checklist

• I've checked to make sure that this issue has not already been filed
• I'm reporting only one issue in this ticket for clarity and focus