• Refactoring to make element model logic sharable with linker. (#32525, #32674)
  • Gracefully handle an invalid packages file. (#32560)
  • Fix silent inconsistency in top level inference. (#32394)
  • Fix test to determine whether a library is in the SDK. (#32707)
  • Fix for type inference from instance creation arguments.
  • Make GenericFunctionTypeElementForLink implement GenericFunctionTypeElementImpl (#32708)
  • Check for missing required libraries dart:core and dart:async. (#32686)
  • Add callable object support. (#32156, #32157, #32426)
  • Avoid putting libraries of all analyzed units in the current session. (too expensive)
  • Deprecate the option to enable using a URI in a part-of directive.
  • Support implicit call() invocation in top-level inference. (#32740)
  • Don't emit errors for lint rule names.
  • Allow empty flutter: sections in pubspec files.
  • Remove the special casing of ‘packages’ files from the analyzer and analysis server.
  • Initial implementation of API to build analysis contexts (replacing ContextLocator.locateContexts).
  • Fix regression in Analyzer callable function support. (#32769)
  • Several performance enhancements, including:
    • Add a shared cache of FileState contents (making flutter repo analysis ~12% faster).
    • Replace SourceFactory.resolveUri() with resolveRelativeUri() in resynthesizer. (10% faster flutter repo analysis)
    • Optimize computing exported namespaces in FileState.
    • Optimize computing exported namespaces in prelinker. (8% faster flutter repo analysis)
    • Add NodeLintRule and UnitLintRule that replace AstVisitor in lints. (6% faster flutter repo analysis)
  • Remove fuzzy arrow support from analyzer. (#31637)
  • More fixes for running the analyzer with Dart 2.
  • Add isXYZ accessors to ParameterElementForLink_VariableSetter. (#32896)
  • Deprecated/removed some unused classes and libraries from the public API.
  • Instantiate bounds to bounds.
  • Use package:path instead of AbsolutePathContext.
  • Check that argument is assignable to parameter in call() (#27098)
  • preview-dart-2 is now the default for the command line analyzer, also implying strong. Use --no-strong and --no-preview-dart-2 to handle Dart 1 code.
  • Export SyntheticBeginToken and SyntheticToken from the analyzer for angular_analyzer_plugin.
  • Improve error messages for annotations involving undefined names (#27788)
  • Add support for getting parse results synchronously.
  • Change linter subscriptions from functions to AstVisitor(s).


  • Don't expect type arguments for class type parameters of static methods. (#32396)
  • Beginnings of changes to make analyzer code --preview-dart-2 safe, though this version is not vetted for that.
  • Infer type arguments in constructor redirections (#30855)
  • Report errors on “as void” and “is void”.
  • Fix instantiating typedefs to bounds (#32114)
  • preview-dart-2 implies strong-mode now and other preview-dart-2 fixes.
  • Store method invocation arguments in summaries when needed for inference (partial fix for #32394)
  • Fix top-level inference and implicit creation (#32397)
  • Do not hint when only a responsive asset exists (#32250)
  • Do not hint when using a deprecated parameter in the defining function (#32468)
  • Fix parsing of super expressions (#32393)
  • Disable conflicting generics test in the task model (#32421)
  • Change how we find analysis roots (#31343, #31344)
  • Fix problem with AST re-writing interacting poorly with inference (#32342)
  • Disallow if a class inconsistently implements a generic interface.
  • Infer void for operator[]= return in task mode for DDC (#32241)
  • Finish and improve mixin type inference in the analyzer (#32146, #32353, #32372)
  • Many enhancements to getElementDeclarations() (#29510, #32495)
  • Remove hint when there's no return from a Future and async method.
  • Add a code range to ElementDeclaration (#29510)
  • Many, many fasta parser changes and improvements.
  • Add missing void annotation (#32161)
  • Add more null-aware hints (#32239)
  • Fix implicit new/const computation (#32221)
  • Treat invocations on dynamic as unknown, except for return type of == (#32173)
  • Fix crash in generic function type argument of unresolved class (#32162)
  • Fix path formatting on windows (#32095)
  • front_end implementation of mixin type inference (#31984)
  • analysis_options no longer breaks some properties (#31345)


  • front_end handling of callable classes (#32064)
  • Improve fasta parser error reporting.
  • Check for unresolved imports to improve handling of optional new/const (#32150).
  • Changes to front_end handling of callable classes.
  • Normalize Windows drive letters to uppercase for analysis (#32095, #32042, #28895).
  • Relax void errors: no error assigning void to void variable.
  • Keep unresolved import/export directives for task based analysis (dart-lang/angular#801).
  • Promote TOP_LEVEL_CYCLE to an error.
  • Code cleanups.


  • Update to reflect that _InternalLinkedHashMap is not a subtype of HashMap in sdk 2.0.0-dev.22.0.


  • Update SDK constraint to require Dart v2-dev release.


  • NOTE This release was pulled from the package site due to an invalid SDK constraint that was fixed in 0.31.0+1.

  • A number of updates, including support for the new Function syntax.


  • Changed the API for creating BazelWorkspace. It should now be constructed using BazelWorkspace.find(). Note that this might return null in the event that the given path is not part of a BazelWorkspace.
  • Added an AST structure to support asserts in constructor initializers (AssertInitializer). AstVisitor classes must now implement visitAssertInitializer().
  • Changed the API for creating PartOfDirective. It now accepts a StringLiteral URI, to accommodate “part of” declarations with a URI string rather than a library name.
  • Removed AST constructors. AST nodes should now be created using astFactory, located in package:analyzer/dart/ast/standard_ast_factory.dart.


  • Removed Element.docRange.


  • Corresponds with the analyzer/server in the 1.20.0-dev.1.0 SDK.


  • Fixed PubSummaryManager linking when a listed package does not have the unlinked bundle.


  • Added support for running the dev compiler in the browser.


  • Support for references to operators in doc comments (#26929).


  • Support for trailing commas in parameter and argument lists (#26647).
  • Strong mode breaking change: can now infer generic type arguments from the constructor invocation arguments (#25220).


  • (Internal) Corresponds with the analyzer/server in the 1.18.0-dev.4.0 SDK.


  • Restore EmbedderUriResolver API.


  • Ignore processing performance improvements.
  • EmbedderUriResolver API updates.


  • Added support for ‘analysis_options.yaml’ files as an alternative to ‘.analysis_options’ files.


  • Moved the public and private API's for the element model into their proper places.
  • Added back support for auto-processing of plugins.


  • Support for DEP 37 (Assert with optional message).
  • Lexical support for DEP 40 (Interface libraries). This does not include any semantic checking to ensure that the implementation libraries are compatible with the interface library.
  • Cleaned up the initialization of plugins. Clients are now required to initialize plugins, possibly using the utility method AnalysisEngine.processRequiredPlugins().
  • Removed the old task model and code that supported it. None of the removed code was intended to be public API, but might be in use anyway.
  • Removed previously deprecated API's (marked with the @deprecated annotation).


  • Options processing API updated to accept untyped options maps (#25126).


  • (Internal) Support for _embedder.yaml discovery and processing.


  • Add code generation utilities for use in both analyzer and analysis server.


  • (Internal) Introduced context configuration logic (configureContext() extracted from server).


  • (Internal) Options validation plugin API update.


  • (Internal) Provisional options validation plugin API.


  • (Internal) Plugin processing fixes.


  • Fixes to address lint registry memory leaking.


  • New AnalysisContext API for associating configuration data with contexts (setConfigurationData() and getConfigurationData()).


  • OptionsProcessor extension point API changed to pass associated AnalysisContext instance into the optionsProcessed call-back.


  • Provisional (internal) plugin manifest parsing.


  • Plugin configuration ErrorHandler typedef API fix.


  • Provisional (internal) support for plugin configuration via .analysis_options.


  • Extension point for WorkManagerFactory(s).
  • Resolve enum documentation comments.
  • Fix display of parameter lists in servers Element structure (issue 24194)
  • Band-aid fix for issue #24191.


  • Removed a warning about importing unnamed libraries
  • Fix handling of empty URIs in .packages files (issue 24126)


  • Fix line starts in multiline comments (issue 23919).
  • Various small fixes to Windows path handling.
  • Update LineInfo computation during incremental resolution.
  • Make exclude list apply to contexts (issue 23941).
  • Fix type propagation for asynchronous for-in statements.
  • Fix ToStringVisitor for external functions (issue 23968).
  • Fix sorting of compilation unit members.
  • Add forwarding for DefaultFormalParameter metadata.
  • Fix most implementations of UriResolver.restoreAbsolute.
  • Disable dart2js hints by default.
  • Support older SDKs (Dart 1.11).


  • Add hook for listening to implicitly analyzed files
  • Add a PathFilter and AnalysisOptionsProvider utility classes to aid clients in excluding files from analysis when directed to do so by an options file.
  • API change: UriResolver.resolveUri(..) now takes an optional actualUri.
  • Change ResolutionCopier.visitAwaitExpression to copy *Type fields.
  • Fix highlight range for missing enum constant in switch (issue 23904).
  • Fix analyzer's treatment of ClassName?.staticMember to match spec.
  • Implement DEP 34 (less restricted mixins).
  • Fix some implementations of UriResolver.resolveUri(..) that did not properly handle the new actualUri argument.


  • Requires Dart SDK 1.12-dev or greater
  • Enable null-aware operators (DEP 9) by default.
  • Generic method support in the element model.


  • dart:sdk extension .sdkext changed to _sdkext (to play nicer with pub).


  • Initial support for analyzing dart:sdk extensions from .sdkext.


  • (Internal) code reorganization to address analysis warnings due to SDK reorg.
  • First steps towards .packages support.


  • Commandline interface moved to dedicated analyzer_cli package. Files moved:
    • bin/analyzer.dart
    • lib/options.dart
    • lib/src/analyzer_impl.dart
    • lib/src/error_formatter.dart
  • Removed dependency on the args package.


  • Changes in the async/await support.


New API:

  • Source.uri added.

    Breaking changes:

  • DartSdk.fromEncoding replaced with fromFileUri.

  • Source.resolveRelative replaced with resolveRelativeUri.