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Won't Fix
Votes
4
Found in
2018.3.0b1
Issue ID
1085243
Regression
No
Crash on scripting_object_get_class because Mono does not throw correct exception
How to reproduce:
1. Open the attached project
2. Open the "SampleScene.Unity" scene
3. Press Play
Actual result: Unity crashes.
Reproducible with: 2019.1.0a5, 2018.3.0b6, 2018.2.13f1, 2018.1.9f2, 2017.4.13f1, 2017.2.4f1.
Notes:
The crash is caused by lines 29 and 30 (both have to be executed to reproduce the crash) in Crashy.cs
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Resolution Note:
We should raise an exception rather than crash when reference and valuetype fields overlap. However, detecting this in mono has proven more difficult than expected. I am resolving this for now as this crash only occurs in a low likelihood event, where a user has explicitly overlapped reference and valuetype fields via Explicit layout.
// Avoid code like the following
[StructLayout(LayoutKind.Explicit)]
public struct GCCrasher
{
[FieldOffset(0)] public int valueType;
[FieldOffset(0)] public GameObject referenceType;
}