Segmentation fault when disconnecting while saving a schematic

[Xaver106]

Server Implementation

Paper

Server Version

1.17.1

Describe the bug

If you disconnect while saving a schematic, the server will crash.

To Reproduce

1. Copy a big area and save it to a schematic
2. While the schematic saves to disc disconnect from the server
3. The server crashes

Expected behaviour

The server shouldn't crash

Screenshots / Videos

No response

Error log (if applicable)

https://gist.github.com/Xaver106/3dc75fe0d0bf85b99ec412ad7bc11890

Fawe Debugpaste

https://athion.net/ISPaster/paste/view/ebdfc4706a1a4fb58576801f48d205d4

Fawe Version

FastAsyncWorldEdit version 1.17-425;37cc817

Checklist

• I have included a Fawe debugpaste.
• I am using the newest build from https://ci.athion.net/job/FastAsyncWorldEdit/ and the issue still persists.

Anything else?

No response

[MattBDev]

A segment fault in Java is extremely rare. Can we confirm this behavior on other servers too?

[NotMyFault]

I could replicate it, hence I labeled it as "Approved".

[MattBDev]

Just double checking. 😛

[SirYwell]

FAWE is closing the DiskOptimizedClipboard when the player quits, but this is not synchronized with the save process. Therefore, we're accessing native memory after it was freed.