We’ve recently upgraded our project from Unreal Engine 4.27 to Unreal Engine 5.3.2 and are now experiencing a critical LowLevelFatalError that points to memory heap corruption on Windows platform. Our game was largely stable on 4.27, and this issue has started occurring randomly since the upgrade to 5.3.2.
Any guidance, similar experiences, or debugging tips would be incredibly helpful as we try to stabilize our project
Hi,
memory stomps are somewhat tricky to debug, but you can try running your game with -stompmalloc or -stomp2malloc to catch certain types of memory corruption.
These should give you a report in the log for any detected stomps and could catch whatever is corrupting your heap.
I didn’t find any internal cases related to such a call stack, but we have seen a low single digit number of crashes like this in the wild from Fortnite users.
If it’s heap corruption the callstack might also be only one of many possible crashes as a result of the corruption. Do you see a consistent callstack or multiple different ones?
Best,
Sebastian