Nullability of type of parameter 'writer' doesn't match overridden member (possibly because of nullability attributes).

Cannot convert null literal to non-nullable reference type.

Nullability of reference types in return type of 'IPipelineWriter? ResourceCacheDiscoveryContext.Writer.get' doesn't match implicitly implemented member 'IPipelineWriter IResourceDiscoveryContext.Writer.get' (possibly because of nullability attributes).

Possible null reference argument for parameter 'moduleName' in 'void RunspaceContext.VerboseFoundResource(string name, string moduleName, string scriptName)'.

Possible null reference argument for parameter 'name' in 'bool ILanguageScopeSet.TryScope(string name, out ILanguageScope? scope)'.

Possible null reference argument for parameter 'file' in 'SourceExtent.SourceExtent(ISourceFile file, int? line, int? position)'.

The type 'YamlDotNet.Core.Events.Scalar?' cannot be used as type parameter 'T' in the generic type or method 'ParserExtensions.TryConsume<T>(IParser, out T)'. Nullability of type argument 'YamlDotNet.Core.Events.Scalar?' doesn't match constraint type 'YamlDotNet.Core.Events.ParsingEvent'.

The type 'YamlDotNet.Core.Events.Scalar?' cannot be used as type parameter 'T' in the generic type or method 'ParserExtensions.TryConsume<T>(IParser, out T)'. Nullability of type argument 'YamlDotNet.Core.Events.Scalar?' doesn't match constraint type 'YamlDotNet.Core.Events.ParsingEvent'.

Dereference of a possibly null reference.