v3.0.0 GetValueOrDefault() returns nullable when default value is not nullable

[seangwright]

Environment

• .NET 8, C# 12, VS Code, C# DevKit
• I have NRT enabled and warnings as errors.
• Here are the types of the properties in the following example

Types

• WebPageMetaTitle - string
• BlogPostPageBlogPostContent - IEnumerable<T>
• ListableItemTitle - string

Here's my custom extension

public static Maybe<string> MapNullOrWhiteSpaceAsNone(this Maybe<string> value) =>
        value.Bind(v => string.IsNullOrWhiteSpace(v) ? Maybe.None : Maybe.From(v));

Example

Now I'm seeing an error with .GetValueOrDefault() when I provide it a non-null default.

string metaTitle = Maybe
            .From(WebPageMetaTitle)
            .MapNullOrWhiteSpaceAsNone()
            .IfNoValue(BlogPostPageBlogPostContent
                .TryFirst()
                .Bind(c => Maybe.From(c.ListableItemTitle).MapNullOrWhiteSpaceAsNone()))
            .GetValueOrDefault(""); // ERROR: Converting null literal or possible null value to non-nullable type.

Workarounds

It is unfortunate that I now need to do one of the following

1. .GetValueOrDefault("") ?? "";
2. Create my own extension .GetValueOrDefaultNotNull(""); that is typed as public T GetValueOrDefaultNotNull(T defaultValue = default(T))
3. .GetValueOrDefault("")!;
4. .TryGetValue(out string? val) ? val : "";
5. .Match(v => v, _ => ""); - for some reason the overload resolution no longer works here and I get the compilation error Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement

[vkhorikov]

Could you try v3.1.0 and let me know if this is fixed? Made some adjustments to that method.