chore(deps): update dependency dart to v3.9.2 #6016
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This PR contains the following updates:
3.8.3->3.9.2Release Notes
dart-lang/sdk (dart)
v3.9.2Compare Source
v3.9.1Compare Source
v3.9.0Compare Source
Released on: 2025-08-13
Language
Dart 3.9 assumes null safety when computing type promotion, reachability, and
definite assignment. This makes these features produce more accurate results for
modern Dart programs. As a result of this change, more dead_code warnings may be
produced. To take advantage of these improvements, set your package's SDK
constraint lower bound to 3.9 or greater (
sdk: '^3.9.0').Tools
Analyzer
The dart command-line tool commands that use the analysis server now run
the AOT-compiled analysis server snapshot. These include
dart analyze,dart fix, anddart language-server.There is no functional difference when using the AOT-compiled analysis server
snapshot. But various tests indicate that there is a significant speedup in
the time to analyze a project.
In case of an incompatibility with the AOT-compiled snapshot, a
--no-use-aot-snapshotflag may be passed to these commands. (Please file anissue with the appropriate project if you find that you need to use this
flag! It will be removed in the future.) This flag directs the tool to revert
to the old behavior, using the JIT-compiled analysis server snapshot. To
direct the Dart Code plugin for VS Code to pass this flag, use the
dart.analyzerAdditionalArgssetting. To direct the DartIntelliJ plugin to pass this flag, use the
dart.server.additional.argumentsregistry property, similar to these steps.
Add the
switch_on_typelint rule.Add the
unnecessary_unawaitedlint rule.Support a new annotation,
@awaitNotRequired, which is used by thediscarded_futuresandunawaited_futureslint rules.Improve the
avoid_types_as_parameter_nameslint rule to include typeparameters.
The definition of an "obvious type" is expanded for the relevant lint rules,
to include the type of a parameter.
Many small improvements to the
discarded_futuresandunawaited_futureslint rules.
The code that calculates fixes and assists has numerous performance
improvements.
A new "Remove async" assist is available.
A new "Convert to normal parameter" assist is available for field formal
parameters.
New fixes are available for the following diagnostics:
for_in_of_invalid_typeimplicit_this_reference_in_initializerprefer_foreachundefined_operatoruse_if_null_to_convert_nulls_to_boolsNumerous fixes and improvements are included in the "create method," "create
getter," "create mixin," "add super constructor," and "replace final with
var" fixes.
Dependencies listed in
dependency_overridesin apubspec.yamlfile nowhave document links to pub.dev.
Improvements to type parameters and type arguments in the LSP type hierarchy.
Folding try/catch/finally blocks is now supported for LSP clients.
Improve code completion suggestions with regards to operators, extension
members, named parameters, doc comments, patterns, collection if-elements and
for-elements, and more.
Improve syntax highlighting of escape sequences in string literals.
Add "library cycle" information to the diagnostic pages.
(Thanks @FMorschel for many of the above
enhancements!)
Dart build
dart build -f exe <target>is nowdart build cli --target=<target>. Seedart build cli --helpfor more info.Dart Development Compiler (dartdevc)
Outstanding async code now checks and cancels itself after a hot restart if
it was started in a different generation of the application before the
restart. This includes outstanding
Futures created by callingJSPromise.toDartfrom thedart:js_interopand the underlying thedart:js_utilhelperpromiseToFuture. Dart callbacks will not be run, butcallbacks on the JavaScript side will still be executed.
Fixed a soundness issue that allowed direct invocation of the value returned
from a getter without any runtime checks when the getter's return type was a
generic type argument instantiated as
dynamicorFunction.A getter defined as:
Could trigger the issue with a direct invocation:
Dart native compiler
Added cross-compilation support for
target architectures of
arm(ARM32) andriscv64(RV64GC)when the target OS is Linux.
Pub
Git dependencies can now be version-solved based on git tags.
Use a
tag_patternin the descriptor and a version constraint, and allcommits matching the pattern will be considered during resolution. For
example:
Starting from language version 3.9 the
flutterconstraint upper bound is nowrespected in your root package. For example:
Results in
dart pub getfailing if invoked with a version ofthe Flutter SDK different from
3.33.0.The upper bound of the flutter constraint is still ignored in
packages used as dependencies.
See flutter/flutter#95472 for details.
Configuration
📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).
🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.
♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
🔕 Ignore: Close this PR and you won't be reminded about this update again.
This PR was generated by Mend Renovate. View the repository job log.