9.0.300.md

Fixed

• Fix Realsig+ generates nested closures with incorrect Generic (Issue #17797, PR #17877)
• Fix optimizer internal error for records with static fields (Issue #18165, PR #18280)
• Fix nullness warning with flexible types (Issue #18056, PR #18266)
• Fix internal error when missing measure attribute in an unsolved measure typar. (Issue #7491, PR #18234==
• Set Cancellable.token from async computation (Issue #18235, PR #18238)
• Cancellable: only cancel on OCE with own token (PR #18277)
• Cancellable: set token in more places (PR #18283)

Added

• Added missing type constraints in FCS. (PR #18241)
• The 'use' keyword can be used on IDisposable|null without nullness warnings (PR #18262)

Changed

• FSharpCheckFileResults.ProjectContext.ProjectOptions will not be available when using the experimental Transparent Compiler feature. (PR #18205)
• Update Obsolete attribute checking to account for DiagnosticId and UrlFormat properties. (PR #18224)

Breaking Changes