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Add other breaking changes to CHANGELOG.

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Change-Id: I0616669dc6d8d9a676d057da54d59ea932ec67f1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/141208
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Franklin Yow <frankyow@google.com>
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Robert Nystrom 2020-03-27 00:18:42 +00:00 committed by commit-bot@chromium.org
parent 70f6e6553c
commit 9014495aa5
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52
CHANGELOG.md
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@ -9,17 +9,23 @@ unexpected failures, note the breaking changes listed below.
### Language
There are no language changes in this release.
There are no new language features in this release. The only noteworthy change
is a very minor breaking change in anticipation of the future support for null
safety.
* **Breaking change** [#40675][]: Fixed an implementation bug where local
variable inference would incorrectly use the promoted type of a type
variable.
[#40675]: https://github.com/dart-lang/sdk/issues/40675
### Core libraries
#### `dart:async`
* Make stack traces non-null. Where methods like `completer.completeError()`
allow omitting a stack trace, the platform will now insert a default stack
trace rather than propagate a `null` value.
Error handling functions need no longer be prepared for `null` stack traces.
* **Breaking change** [#40676][]: Changed the return type of
`StreamSubscription.cancel()` to `Future<void>`. Previously, it was
declared to return `Future` and was allowed to return `null` at runtime.
* **Breaking change** [#40681][]: The `runZoned()` function is split into two
functions: `runZoned()` and `runZonedGuarded()`, where the latter has a
@ -27,14 +33,38 @@ There are no language changes in this release.
functions for Null Safety where the two functions will differ in the
nullability of their return types.
* **Breaking change** [#40683][]: Errors passed to
`Completer.completeError()`, `Stream.addError()`, `Future.error()`, etc. can
no longer be `null`. These operations now *synchronously* throw an exception
if passed a `null` error.
* Make stack traces non-null [#40130][]. Where methods like
`completer.completeError()` allow omitting a stack trace, the platform will
now insert a default stack trace rather than propagate a `null` value.
Error handling functions need no longer be prepared for `null` stack traces.
[#40676]: https://github.com/dart-lang/sdk/issues/40676
[#40681]: https://github.com/dart-lang/sdk/issues/40681
[#40683]: https://github.com/dart-lang/sdk/issues/40683
[#40130]: https://github.com/dart-lang/sdk/issues/40130
#### `dart:core`
* The class `CastError` is deprecated, and all implementation specific
classes implementing `TypeError` or `CastError` now implement both. In
a future release, `CastError` will be removed. See issue [40763][] for
details.
* **Breaking change** [#40674][]: Three members on `RuneIterator` no longer
return `null` when accessed before the first call to `moveNext()`. Instead,
`current` and `rawIndex` return `-1` and `currentAsString` returns an empty
string.
* **Breaking change** [#40678][]: The `String.fromEnvironment()` default value
for `defaultValue` is now an empty string instead of `null`. Likewise, the
default value for `int.fromEnvironment()`'s `defaultValue` parameter is
zero. Under null safety, a constructor cannot return `null`, so this
prepares these APIs for that.
* The class `CastError` is deprecated, and all implementation specific classes
implementing `TypeError` or `CastError` now implement both. In a future
release, `CastError` will be removed. See issue [40763][] for details.
* Adds `StackTrace.empty` constant which is the stack trace used as default
stack trace when no better alternative is available.
@ -51,6 +81,8 @@ There are no language changes in this release.
convenient to use in-line in, for example, `=>` function bodies or
constructor initialization lists.
[#40674]: https://github.com/dart-lang/sdk/issues/40674
[#40678]: https://github.com/dart-lang/sdk/issues/40678
[40763]: https://github.com/dart-lang/sdk/issues/40763
#### `dart:developer`