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Fixed in 5.5.1



Found in


Issue ID




Mono fails to compile script with Generic expression



Steps to reproduce:
1. Open User's attached project with
2. Open Console

Result: error in the Console: Assets/Shapes2/AreaExtensions.cs(210,64): error CS0314: The type `TVector' cannot be used as type parameter `TVector' in the generic type or method `VisoftMath.Shapes2.IBezier<TVector>'. There is no boxing or type parameter conversion from `TVector' to `VisoftMath.Shapes2.IVector<TVector>'

Reproduced with: 5.6.1p1, 5.6.1f1, 5.6.0a3, 5.5.0b11
Not reproduced with: 2017.1.0b4, 5.4.3f1, 5.3.7p1

The same code does compile in Visual Studio.
Code also compiles in older versions of Unity.

Comments (1)

  1. quinn_scopely

    Jan 11, 2017 17:38

    We have reproduced this same problem with a small sample project at

    It appears to be a specific combination of virtual functions, subclassing, and generics that triggers the bug.

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