clockworklabs/SpacetimeDB · error · InvalidOperationException

Unsupported type {type}

Error message

Unsupported type {type}

What it means

Error "Unsupported type {type}" thrown in clockworklabs/SpacetimeDB.

Source

Thrown at crates/bindings-csharp/BSATN.Codegen/Utils.cs:146

                SpecialType.System_Int16 => "SpacetimeDB.BSATN.I16",
                SpecialType.System_UInt16 => "SpacetimeDB.BSATN.U16",
                SpecialType.System_Int32 => "SpacetimeDB.BSATN.I32",
                SpecialType.System_UInt32 => "SpacetimeDB.BSATN.U32",
                SpecialType.System_Int64 => "SpacetimeDB.BSATN.I64",
                SpecialType.System_UInt64 => "SpacetimeDB.BSATN.U64",
                SpecialType.System_Single => "SpacetimeDB.BSATN.F32",
                SpecialType.System_Double => "SpacetimeDB.BSATN.F64",
                SpecialType.System_String => "SpacetimeDB.BSATN.String",
                SpecialType.None => GetTypeInfoForNamedType(namedType),
                _ => throw new InvalidOperationException(
                    $"Unsupported special type {type} ({type.SpecialType})"
                ),
            },
            IArrayTypeSymbol { ElementType: var elementType } => elementType.SpecialType
            == SpecialType.System_Byte
                ? "SpacetimeDB.BSATN.ByteArray"
                : $"SpacetimeDB.BSATN.Array<{elementType}, {GetTypeInfo(elementType)}>",
            _ => throw new InvalidOperationException($"Unsupported type {type}"),
        };

        static string GetTypeInfoForNamedType(INamedTypeSymbol type)
        {
            if (type.TypeKind == Microsoft.CodeAnalysis.TypeKind.Error)
            {
                throw new UnresolvedTypeException(type);
            }
            if (type.TypeKind == Microsoft.CodeAnalysis.TypeKind.Enum)
            {
                if (
                    !type.GetAttributes()
                        .Any(a => a.AttributeClass?.ToString() == "SpacetimeDB.TypeAttribute")
                )
                {
                    throw new InvalidOperationException(
                        $"Enum {type} does not have a [SpacetimeDB.Type] attribute"
                    );

View on GitHub (pinned to 524b4487d9)

When it happens

Trigger: Thrown at crates/bindings-csharp/BSATN.Codegen/Utils.cs:146 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of clockworklabs/SpacetimeDB@524b4487d9 (2026-08-16). Data as JSON: /api/errors/a568a288635fcf84. Report an issue: GitHub.