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Fixed

Fixed in 6000.5.0a5

Votes

0

Found in

6000.0.63f1

6000.2.15f1

6000.3.0f1

6000.4.0b1

6000.5.0a3

Issue ID

UUM-129243

Regression

No

Crash on DualThreadAllocator<DynamicHeapAllocator>::Contains when closing a Sub Scene with DynamicBuffer to MetaChunkEntity in Play mode

Core Runtime

-

How to reproduce:
1. Open the attached “IN-124013” project
2. Open the “h” scene
3. Enter Play mode
4. In the Hierarchy, close the Sub Scene
5. Observe the crash

Reproducible with: 6000.0.0b11, 6000.0.63f1, 6000.2.15f1, 6000.3.0f1, 6000.4.0b1, 6000.5.0a3
Could not test with: 2023.3.0b10 (could not solve errors from downgrading)

Reproduced on: Windows 11
Not reproduced on: No other environment tested

Notes:
- If it doesn’t crash after step 3, close and re-open the Sub Scene multiple times or exit then re-enter Play mode
- Also reproducible on a fresh project

First few lines of the stack trace:
0x00007FF9E1EDDD10 (Unity) DualThreadAllocator<DynamicHeapAllocator>::Contains
0x00007FF9E1ED7977 (Unity) MemoryManager::TryDeallocateWithLabel
0x00007FF9E1ED9393 (Unity) free_alloc_internal
0x00007FF9E18DB9C2 (Unity) UnsafeUtility::Free
0x00007FF9E177DB37 (Unity) UnsafeUtility_CUSTOM_FreeTracked

  1. Resolution Note:

    Chunk dynamic buffers were incorrectly disposed from the entity's own chunk, effectively attempting to free memory from an invalid pointer. This has now been fixed, thanks for reporting the issue.

  2. Resolution Note (fix version 6000.5.0a5):

    Chunk dynamic buffers were incorrectly disposed from the entity's own chunk, effectively attempting to free memory from an invalid pointer. This has now been fixed, thanks for reporting the issue.

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