Fatal error, mallocbinned. Unsure of the cause

[JJTheJetPlane27]

Hey everyone, just started the finishing touches of a game ive been working on, so ive started to create builds to see if i had any errors or issues in game. Unfortunately ive started running across this fatal error.

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\HAL\MallocBinned2.cpp] [Line: 1438]
FMallocBinned2 Attempt to realloc an unrecognized block 00000205423D0000 canary == 0x0 != 0xe3

It appears to be happening completely randomly, and i dont know the first place to start figuring out how to fix this. One person commented that switching to a different renderer might help, but I was unable to launch the game at all using vulkan. Any pointers or places to start to fix this issue?

[Manula96]

Hi did you find a reason for this? My build is also crashing at random times with this error. Thanks

[3dRaven]

Perhaps this thread could be a possible solution?

500×500 2.84 KB

Hey Stephan, We have the MallocVerify proxy which does the same thing as you have hacked in - you can just enable it via the MALLOC_VERIFY macro at the top of MallocVerify.h. The pointer value you have is absolutely invalid - you can tell as it’s not aligned. This suggests that it’s not merely stale, but has been corrupted somehow. This could, as you and others have suggested above, have occurred as a result of bad pointers coming in and out of the allocator. Another simple thing to add wou…

It tackles a problem regarding FMallocBinned2

[FrostyJas]

This is to add onto what Raven mentioned. It’s from Github, so tread at your own discretion. But, they seemed to find a solution to this exact error there. [BUG] "FMallocBinned2 Attempt to realloc an unrecognized block 000002413BC60000 canary == 0x0 != 0xe3" crash · Issue #267 · praydog/UEVR · GitHub