The old API is deprecated for removal, but the new API is based on the similar concepts (README), and the migration path is designed to be graceful: migration guide.
Dispatchers
Introduced CoroutineDispatcher.limitedParallelism that allows obtaining a view of the original dispatcher with limited parallelism (#2919).
Dispatchers.IO.limitedParallelism usages ignore the bound on the parallelism level of Dispatchers.IO itself to avoid starvation (#2943).
Introduced new Dispatchers.shutdown method for containerized environments (#2558).
newSingleThreadContext and newFixedThreadPoolContext are promoted to delicate API (#2919).
Breaking changes
When racing with cancellation, the future builder no longer reports unhandled exceptions into the global CoroutineExceptionHandler. Thanks @vadimsemenov! (#2774, #2791).
Dispatchers.Main is now used as the default source of time for delay and withTimeout when present(#2972).
To opt-out from this behaviour, kotlinx.coroutines.main.delay system property can be set to false.
Java target of coroutines build is now 8 instead of 6 (#1589).
Source-breaking change: extension collect no longer resolves when used with a non-in-place argument of a functional type. This is a candidate for a fix, uncovered after 1.6.0, see #3107 for the additional details.
Bug fixes and improvements
Kotlin is updated to 1.6.0.
Kotlin/Native new memory model is now supported in regular builds of coroutines conditionally depending on whether kotlin.native.binary.memoryModel is enabled (#2914).
Introduced CopyableThreadContextElement for mutable context elements shared among multiple coroutines. Thanks @yorickhenning! (#2893).
transformWhile, awaitClose, ProducerScope, merge, runningFold, runingReduce, and scan are promoted to stable API (#2971).
SharedFlow.subscriptionCount no longer conflates incoming updates and gives all subscribers a chance to observe a short-lived subscription (#2488, #2863, #2871).
Flow exception transparency mechanism is improved to be more exception-friendly (#3017, #2860).
Cancellation from flat* operators that leverage multiple coroutines is no longer propagated upstream (#2964).
SharedFlow.collect now returns Nothing (#2789, #2502).
DisposableHandle is now fun interface, and corresponding inline extension is removed (#2790).
FlowCollector is now fun interface, and corresponding inline extension is removed (#3047).
Deprecation level of all previously deprecated signatures is raised (#3024).
The version file is shipped with each JAR as a resource (#2941).
Unhandled exceptions on K/N are passed to the standard library function processUnhandledException (#2981).
A direct executor is used for Task callbacks in kotlinx-coroutines-play-services (#2990).
Metadata of coroutines artifacts leverages Gradle platform to have all versions of dependencies aligned (#2865).
Default CoroutineExceptionHandler is loaded eagerly and does not invoke ServiceLoader on its exception-handling path (#2552).
Fixed the R8 rules for ServiceLoader optimization (#2880).
The old API is deprecated for removal, but the new API is based on the similar concepts (README), and the migration path is designed to be graceful: migration guide.
Dispatchers
Introduced CoroutineDispatcher.limitedParallelism that allows obtaining a view of the original dispatcher with limited parallelism (#2919).
Dispatchers.IO.limitedParallelism usages ignore the bound on the parallelism level of Dispatchers.IO itself to avoid starvation (#2943).
Introduced new Dispatchers.shutdown method for containerized environments (#2558).
newSingleThreadContext and newFixedThreadPoolContext are promoted to delicate API (#2919).
Breaking changes
When racing with cancellation, the future builder no longer reports unhandled exceptions into the global CoroutineExceptionHandler. Thanks @vadimsemenov! (#2774, #2791).
Dispatchers.Main is now used as the default source of time for delay and withTimeout when present(#2972).
To opt-out from this behaviour, kotlinx.coroutines.main.delay system property can be set to false.
Java target of coroutines build is now 8 instead of 6 (#1589).
Source-breaking change: extension collect no longer resolves when used with a non-in-place argument of a functional type. This is a candidate for a fix, uncovered after 1.6.0, see #3107 for the additional details.
Bug fixes and improvements
Kotlin is updated to 1.6.0.
Kotlin/Native new memory model is now supported in regular builds of coroutines conditionally depending on whether kotlin.native.binary.memoryModel is enabled (#2914).
Introduced CopyableThreadContextElement for mutable context elements shared among multiple coroutines. Thanks @yorickhenning! (#2893).
transformWhile, awaitClose, ProducerScope, merge, runningFold, runingReduce, and scan are promoted to stable API (#2971).
SharedFlow.subscriptionCount no longer conflates incoming updates and gives all subscribers a chance to observe a short-lived subscription (#2488, #2863, #2871).
Flow exception transparency mechanism is improved to be more exception-friendly (#3017, #2860).
Cancellation from flat* operators that leverage multiple coroutines is no longer propagated upstream (#2964).
SharedFlow.collect now returns Nothing (#2789, #2502).
DisposableHandle is now fun interface, and corresponding inline extension is removed (#2790).
FlowCollector is now fun interface, and corresponding inline extension is removed (#3047).
Deprecation level of all previously deprecated signatures is raised (#3024).
The version file is shipped with each JAR as a resource (#2941).
Unhandled exceptions on K/N are passed to the standard library function processUnhandledException (#2981).
A direct executor is used for Task callbacks in kotlinx-coroutines-play-services (#2990).
Metadata of coroutines artifacts leverages Gradle platform to have all versions of dependencies aligned (#2865).
Default CoroutineExceptionHandler is loaded eagerly and does not invoke ServiceLoader on its exception-handling path (#2552).
Fixed the R8 rules for ServiceLoader optimization (#2880).
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Bumps kotlinx-coroutines-core from 1.5.2 to 1.6.0.
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Changelog
Sourced from kotlinx-coroutines-core's changelog.
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Commits
c51f795
Merge pull request #3105 from Kotlin/version-1.6.0812f2dd
Version 1.6.0bbb175b
Fix Dispatchers.Main not being fully initialized on Android and Swing (#3101)69bc2a3
Restore MPP backwards compatibility on K/JS and K/N (#3104)10891bb
Fix a broken sentence in CoroutineDispatcher.kt (#3102)f3db701
Fix indentation in Transform.kt (#3100)7cc59e4
Version 1.6.0-RC32ddcbe8
Fix R8 warnings (#3090)d5a66e0
Add TimeSource implementation to TestCoroutineScheduler7a249c3
Fix typoDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)