Update kotlin.version to v1.7.10

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlin:kotlin-maven-allopen (source)	1.3.72 -> 1.7.10
org.jetbrains.kotlin:kotlin-maven-plugin (source)	1.3.72 -> 1.7.10
org.jetbrains.kotlin:kotlin-test (source)	1.3.72 -> 1.7.10
org.jetbrains.kotlin:kotlin-reflect (source)	1.3.72 -> 1.7.10
org.jetbrains.kotlin:kotlin-stdlib (source)	1.3.72 -> 1.7.10

---

Release Notes

JetBrains/kotlin

v1.7.10

Compare Source

Changelog

Compiler

• KT-52702 Invalid locals information when compiling kotlinx.collections.immutable with Kotlin 1.7.0-RC2
• KT-52892 Disappeared specific builder inference resolution ambiguity errors
• KT-52782 Appeared receiver type mismatch error due to ProperTypeInferenceConstraintsProcessing compiler feature
• KT-52718 declaringClass deprecation message mentions the wrong replacement in 1.7

IDE. Configuration

• KTIJ-21982 Cannot run/build anything with Kotlin plugin since last update

Tools. Gradle

• KT-52777 'org.jetbrains.kotlinx:atomicfu:1.7.0' Gradle 7.0+ plugin variant was published with missing classes

Tools. Gradle. JS

• KT-52856 Kotlin/JS: Upgrade NPM dependencies

Tools. Gradle. Multiplatform

• KT-52955 SourceSetMetadataStorageForIde: Broken 'cleanupStaleEntries' with enabled configuration caching or isolated ClassLoaders
• KT-52694 Kotlin 1.7.0 breaks Configuration Caching in Android projects

Tools. Incremental Compile

• KT-52669 Full rebuild in IC exception recovery leaves corrupt IC data

Checksums

File	Sha256
kotlin-compiler-1.7.10.zip	7683f5451ef308eb773a686ee7779a76a95ed8b143c69ac247937619d7ca3a09
kotlin-native-linux-x86_64-1.7.10.tar.gz	b874373e87381b94c6a385178ea9594a5b4cfeb2fbae2bd89d3cb84c96bc3b96
kotlin-native-macos-x86_64-1.7.10.tar.gz	4e9470c25e0c6b3b79e86a59c7eca4d79c5a28ca515e80db93504535b2332a00
kotlin-native-macos-aarch64-1.7.10.tar.gz	c02be577f541a5c73e1af75534006eea6e09cf67b3a886f323dae6f0406bcb3e
kotlin-native-windows-x86_64-1.7.10.zip	52c64c754a23da3d554d89beb9cdc322ffcb19b8d6f1e812e849e597d282b99d

v1.7.0

Compare Source

Analysis API. FIR

• KT-50864 Analysis API: ISE: "KtCallElement should always resolve to a KtCallInfo" is thrown on call resolution inside plusAssign target
• KT-50252 Analysis API: Implement FirModuleResolveStates for libraries
• KT-50862 Analsysis API: do not create use site subsitution override symbols

Analysis API. FIR Low Level API

• KT-50729 Type bound is not fully resolved
• KT-50728 Lazy resolve of extension function from 'kotlin' package breaks over unresolved type
• KT-50271 Analysis API: get rid of using FirRefWithValidityCheck

Backend. Native. Debug

• KT-50558 K/N Debugger. Error is not displayed in variables view for catch block

Compiler

New Features

• KT-26245 Add ability to specify generic type parameters as not-null
• KT-45165 Remove JVM target version 1.6
• KT-27435 Allow implementation by delegation to inlined value of inline class
• KT-47939 Support method references to functional interface constructors
• KT-50775 Support IR partial linkage in Kotlin/Native (disabled by default)
• KT-51737 Kotlin/Native: Remove unnecessary safepoints on watchosArm32 and iosArm32 targets
• KT-44249 NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER with type usage in higher order function

Performance Improvements

• KT-48233 Switching to JVM IR backend increases compilation time by more than 15%
• KT-51699 Kotlin/Native: runtime has no LTO in debug binaries
• KT-34466 Use optimized switch over enum only when all entries are constant enum entry expressions
• KT-50861 FIR: Combination of array set convention and plusAssign works exponentially
• KT-47171 For loop doesn't avoid boxing with value class iterators (JVM)
• KT-29199 'next' calls for iterators of merged primitive progressive values are not specialized
• KT-50585 JVM IR: Array constructor loop should use IINC
• KT-22429 Optimize 'for' loop code generation for reversed arrays
• KT-50074 Performance regression in String-based 'when' with single equality clause
• KT-22334 Compiler backend could generate smaller code for loops using range such as integer..array.size -1
• KT-35272 Unnecessary null check on unsafe cast after not-null assertion operator
• KT-27427 Optimize nullable check introduced with 'as' cast

Fixes

• KT-46762 Finalize support for jspecify
• KT-51499 @​file:OptIn doesn't cover override methods
• KT-52037 FIR: add error in 1.7.0 branch if run with non-compatible plugins
• KT-46756 Release the K2/JVM compiler in Alpha
• KT-49715 IR: "IllegalStateException: Function has no body: FUN name:toString" during IR lowering with shadowed extension inside interface
• KT-45508 False negative ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED on a fake override with an abstract super class member
• KT-28078 Report error "Public property exposes its private type" for primary constructor properties instead of warning
• KT-49017 Forbid usages of super or super<Some> if in fact it accesses an abstract member
• KT-38078 Prohibit calling methods from Any with "super" qualifier once they are overridden as abstract in superclass
• KT-52363 Evaluate impact of qualified this behavior change warnings
• KT-52561 JVM: Coroutine state machine loses value after a check-induced smart cast
• KT-52311 java.lang.VerifyError: Bad type on operand stack
• KT-41124 Inconsistency of exceptions at init block for an enum entry with and without a qualifier name
• KT-46860 Make safe calls always nullable
• KT-52503 New green code appeared at the callable reference resolution
• KT-51925 Native: "IllegalStateException: Symbol for kotlinx.cinterop/CStructVar|null[0] is unbound" caused by inline function
• KT-49317 "IllegalStateException: Parent of this declaration is not a class: FUN LOCAL_FUNCTION_FOR_LAMBDA" with parameter of suspend type with the default parameter
• KT-51844 New errors in overload resolution involving vararg extension methods
• KT-52006 "java.lang.Throwable: Unbalanced tree Exception" on indexing kotlin project
• KT-51223 Report warning about conflicting inherited members from deserialized dependencies
• KT-51439 FE 1.0: implement type variance conflict deprecation on qualifier type arguments
• KT-51433 FE 1.0: implement warnings about label resolve changes
• KT-51317 Regression in resolution of lambdas where expected type has an extension receiver parameter
• KT-45935 JVM IR: Add not-null assertion for explicit definitely not-null parameters
• KT-51818 "ClassCastException: class CoroutineSingletons cannot be cast to class" with suspendCoroutineUninterceptedOrReturn and coroutines
• KT-51718 JVM / IR: "VerifyError: Bad type on operand stack" caused by nullable variable inside suspend function
• KT-51927 Native: The symbol of unexpected type encountered during IR deserialization error when multiple libraries have non-conflicting declarations with the same name
• KT-52394 JVM: Missing annotation on method with value class return type when a subclass is present in the same file in Kotlin 1.7.0-Beta
• KT-51640 FIR: remove warning about "far from being production ready"
• KT-45553 FIR: support hiding declaration from star import by as import
• KT-52404 Prolong deprecation cycle for errors at contravariant usages of star projected argument from Java
• KT-50734 TYPE_MISMATCH: NonNull parameter with a type of Nullable type argument causes compiler warning
• KT-51235 JVM / IR: "AbstractMethodError: Receiver class does not define or inherit an implementation of the resolved method" when property with inline class type is overridden to return Nothing?
• KT-48935 NI: Multiple generic parameter type constraints are not applied as expected when the parameter is of function type
• KT-49661 NI: No TYPE_INFERENCE_UPPER_BOUND_VIOLATED when argument is inferred by return type
• KT-50877 Inconsistent flexible type
• KT-51988 "NPE: getContainingDeclaration…lDeclarationType.REGULAR) must not be null" when using @​BuilderInference with multiple type arguments
• KT-48890 Revert Opt-In restriction "Overriding methods can only have opt-in annotations that are present on their basic declarations."
• KT-52035 FIR: add error in 1.7.0 branch if run on JS / Native configuration
• KT-45461 NI: False negative TYPE_INFERENCE_UPPER_BOUND_VIOLATED when passing an argument to a function with generic constraints
• KT-52146 JVM IR: "AssertionError: Primitive array expected" on vararg of SAM types with self-type and star projection
• KT-50730 Implement error for a super class constructor call on a function interface in supertypes list
• KT-52040 JVM: ClassFormatError Illegal method name "expectFailure$__proxy-0"
• KT-50845 Postpone rxjava errors reporting in the strict mode till 1.8 due to found broken cases
• KT-51979 "AssertionError: No modifier list, but modifier has been found by the analyzer" exception on incorrect Java interface override
• KT-51759 FIR DFA: false positive "Variable must be initialized"
• KT-50378 Unresolved reference for method in Jsoup library in a kts script file
• KT-34919 "Visibility is unknown yet" when named parameter in a function type used in a typealias implemented by an abstract class
• KT-51893 Duplicated [OVERRIDE_DEPRECATION] on overridden properties
• KT-41034 K2: Change evaluation semantics for combination of safe calls and convention operators
• KT-51843 Functional interface constructor references are incorrectly allowed in 1.6.20 without any compiler flags
• KT-51914 False positive RETURN_TYPE_MISMATCH in intellij ultimate
• KT-51711 Compiler warning is displayed in case there is 'if' else branch used with elvis
• KT-33517 Kotlin ScriptEngine does not respect async code when using bindings
• KT-51850 FIR cannot resolve ambiguity with different SinceKotlin/DeprecatedSinceKotlin
• KT-44705 Deprecate using non-exhaustive if's and when's in rhs of elvis
• KT-44510 FIR DFA: smartcast after elvis with escaping lambda
• KT-44879 FIR DFA: Track inc and dec operator calls in preliminary loop visitor
• KT-51758 FIR: explicit API mode errors should not be reported for effectively internal / private entities
• KT-51203 FIR: Inconsistent RETURN_TYPE_MISMATCH and TYPE_MISMATCH reporting on functions and properties
• KT-51624 FIR: false-positive INAPPLICABLE_LATEINIT_MODIFIER for lateinit properties with unresolved types
• KT-51204 FIR IC: Incremental compilation fails on nested crossinline
• KT-51798 Fix ISE from IR backend when data class inherits equals/hashCode/toString with incompatible signature
• KT-46187 FIR: OVERLOAD_RESOLUTION_AMBIGUITY on SAM-converted callable reference to List::plus
• KT-51761 Incorrect NONE_APPLICABLE in expect class
• KT-51756 FIR: false positive NO_VALUE_FOR_PARAMETER in expect class delegated constructor call
• KT-49778 Support cast to DefinitelyNotNull type in Native
• KT-51441 -Xpartial-linkage option specified in Gradle build script is not passed to Native linker
• KT-34515 NI: "AssertionError: Base expression was not processed: POSTFIX_EXPRESSION" with double not-null assertion to brackets
• KT-48546 PSI2IR: "org.jetbrains.kotlin.psi2ir.generators.ErrorExpressionException: null: KtCallExpression" with recursive property access in lazy block
• KT-28109 "AssertionError: No setter call" for incrementing parenthesized result of indexed access convention operator
• KT-46136 Unsubstituted return type inferred for a function returning anonymous object upcast to supertype
• KT-51364 FIR: ambiguity due to String constructors clash
• KT-51621 FIR: visible VS invisible qualifier conflict
• KT-50468 FIR compilers fails with CCE when meets top-level destruction
• KT-51557 Inline stack frame is not shown for default inline lambda
• KT-51358 OptIn: show default warning/error message in case of empty message argument
• KT-44152 FIR2IR fails on declarations from java stdlib if java classes are loaded from PSI instead of binaries
• KT-50949 PSI2IR: NSEE from ArgumentsGenerationUtilsKt.createFunctionForSuspendConversion with providing lambda as argument with suspend type
• KT-39256 ArrayStoreException with list of anonymous objects with inferred types created in reified extension function
• KT-39883 Deprecate computing constant values of complex boolean expressions in when condition branches and conditions of loops
• KT-36952 Exception during codegen: cannot pop operand off an empty stack (reference equality, implicit boxing, type check)
• KT-51233 AssertionError in JavaLikeCounterLoopBuilder with Compose
• KT-51254 Verify Error on passing null to type parameter extending inline class
• KT-50996 [FIR] Support Int -> Long conversion for property initializers
• KT-51000 [FIR] Support Int -> Long? conversion
• KT-51003 [FIR] Consider Int -> Long conversion if expected type is type variable
• KT-51018 [FIR] Wrong type inference if one of constraints is integer literal
• KT-51446 Metadata serialization crashes with IOOBE when deserializing underlying inline class value with type table enabled
• KT-50973 Redundant line number mapping for finally block with JVM IR
• KT-51272 Incompatible types: KClass<Any> and callable reference Collection::class
• KT-51274 "Expected some types" exception on when branch for when expression of erroneous type
• KT-51229 FIR: private constructor of internal data class treated as internal and not private
• KT-50750 [FIR] Report UNSUPPORTED on array literals not from annotation classes
• KT-51200 False EXPOSED_PARAMETER_TYPE for internal type parameter of internal type
• KT-49804 False positive of UPPER_BOUND_VIOLATED and RETURN_TYPE_MISMATCH
• KT-51121 Inconsistent SAM behavior in multiple cases causing AbstractMethodError (Kotlin 1.6.10)
• KT-50136 FIR: syntax error on (T & Any)
• KT-49465 FIR2IR: support definitely not-null types
• KT-51357 FIR: error in inference while using integer literal in expected Long position
• KT-49925 [FIR] Incorrect builder inference (different cases)
• KT-50542 "IllegalStateException: Type parameter descriptor is not initialized: T declared in sort" with definitely non-null type Any & T in generic constraint
• KT-51171 FIR: class Error resolution problem
• KT-51156 Multiplatform linkDebugFramework task throws NoSuchElementException when expect class constructors utilize nested enum constant
• KT-51017 [FIR] Ambiguity on callable reference between two functions on generic receiver with different bounds
• KT-51007 [FIR] False positive ILLEGAL_SUSPEND_FUNCTION_CALL if fun interface with suspend function declared in another module
• KT-50998 [FIR] Int.inv() cal does not considered as compile time call
• KT-51009 [FIR] Incorrect inference of lambda in position of return
• KT-50997 [FIR] Incorrect type of typealias for suspend functional type
• KT-49714 Compiler reports "'operator modifier is inapplicable" if expect class with increment operator is provided via type alias
• KT-48623 Type nullability enhancement improvements
• KT-44623 "IllegalStateException: IdSignature is allowed only for PublicApi symbols" when suspending receiver is annotated with something
• KT-46000 JVM / IR: AssertionError on isSubtypeOfClass check in copyValueParametersToStatic with Compose
• KT-50211 Annotation Instantiation with default arguments in Native
• KT-49412 Controversial "type argument is not within its bounds" reported by FIR
• KT-48044 [FIR] Investigate behavior of UPPER_BOUND_VIOLATED on complex cases
• KT-37975 Don't show deprecation of enum class itself for its own member
• KT-50737 Inheritance from SuspendFunction leads to compiler crash
• KT-50723 Implement a fix of reporting of uninitialized parameter in default values of parameters
• KT-50749 Implement UNSUPPORTED reporting on array literals inside objects in annotation classes
• KT-50753 Implement reporting errors on cycles in annotation parameter types
• KT-50758 Fix inconsistency of exceptions at init block for an enum entry with and without a qualifier name
• KT-50182 CONST_VAL_NOT_TOP_LEVEL_OR_OBJECT: clarify error message for const in object expression
• KT-50183 Fix missing apostrophe escapes in compiler error messages
• KT-50788 FIR: false unsafe call on not-null generic
• KT-50785 FIR: inconsistent smart cast after comparison with true
• KT-50858 [FIR LL] FIR in low level mode creates multiple symbols for same declaration
• KT-50822 Analysis API: make declaration transformers machinery to be a thread safe
• KT-50972 FIR doesn't report VAL_REASSIGNMENT on synthetic properties
• KT-50969 FIR: diamond inheritance with different parameter types depends on a supertype order
• KT-50875 FIR: no smart cast after reassignment with elvis
• KT-50835 Inline functions with suspend lambdas break the tail-call optimization
• KT-49485 JVM / IR: StackOverflowError with long when-expression conditions
• KT-35684 NI: "IllegalStateException: Expected some types" from builder-inference about intersecting empty types on trivial code
• KT-50776 FIR: ambiguity between Sequence.forEach and Iterable.forEach
• KT-48908 Error for annotation on parameter type could have distinct ID and message referring 1.6
• KT-48907 SUPERTYPE_IS_SUSPEND_FUNCTION_TYPE error could have message referring version 1.6
• KT-50774 FIR2IR: NSEE in case of lambda in enum entry constructor call
• KT-49016 Drop QUALIFIED_SUPERTYPE_EXTENDED_BY_OTHER_SUPERTYPE diagnostic
• KT-34338 Parameterless main causes duplicate JVM signature error
• KT-50577 JVM_IR: No NPE when casting uninitialized value of non-null type to non-null type
• KT-50476 JVM_IR: NSME when calling 'super.removeAt(Int)' implemented in Java interface as a default method
• KT-50257 JVM_IR: Incorrect bridge delegate signature for renamed remove(I) causes SOE with Kotlin class inherited from fastutils IntArrayList
• KT-50470 FIR: inapplicable candidate in delegate inference due to nullability
• KT-32744 Inefficient compilation of null-safe call (extra null checks, unreachable code)

Docs & Examples

• KT-52032 Document performance optimizations of the Kotlin/JVM compiler in 1.7.0
• KT-49424 Update KEEP for OptIn

IDE

Fixes

• KTIJ-21735 Exception when opening a project
• KTIJ-17414 UAST: Synthetic enum methods have null return values
• KTIJ-17444 UAST: Synthetic enum methods are missing nullness annotations
• KTIJ-19043 UElement#comments is empty for a Kotlin property with a getter
• KTIJ-10031 IDE fails to suggest a project declaration import if the name clashes with internal declaration with implicit import from stdlib (ex. @​Serializable)
• KTIJ-21515 Load JVM target 1.6 as 1.8 in Maven projects
• KTIJ-21151 Exception about wrong read access from "Java overriding methods searcher" with Kotlin overrides
• KTIJ-20736 NoClassDefFoundError: Could not initialize class org.jetbrains.kotlin.idea.roots.KotlinNonJvmOrderEnumerationHandler. Kotlin plugin 1.7 fails to start
• KT-50111 Resolving into KtUltraLightMethod
• KTIJ-21063 IDE highlighting: False positive error "Context receivers should be enabled explicitly"
• KTIJ-20810 NoClassDefFoundError: org/jetbrains/kotlin/idea/util/SafeAnalyzeKt errors in 1.7.0-master-212 kotlin plugin on project open
• KTIJ-19088 KotlinUFunctionCallExpression.resolve() returns null for calls to @​JvmSynthetic functions
• KTIJ-17869 KotlinUFunctionCallExpression.resolve() returns null for instantiations of local classes with default constructors
• KTIJ-21061 UObjectLiteralExpression.getExpressionType() returns the base class type for Kotlin object literals instead of the anonymous class type
• KTIJ-20200 UAST: @​Deprecated(level=HIDDEN) constructors are not returning UMethod.isConstructor=true
• KTIJ-19624 NoDescriptorForDeclarationException on iosTest.kt.vm

IDE. Code Style, Formatting

• KTIJ-20554 Introduce some code style for definitely non-null types

IDE. Completion

• KTIJ-14740 Multiplatform declaration actualised in an intermediate source set is shown twice in a completion popup called in the source set

IDE. Debugger

• KTIJ-20815 MPP Debugger: Evaluation of expect function for the project with intermediate source set may fail with java.lang.NoSuchMethodError

IDE. Decompiler, Indexing, Stubs

• KTIJ-21472 "java.lang.IllegalStateException: Could not read file" exception on indexing invalid class file
• KTIJ-20802 Definitely Not-Null types: "UpToDateStubIndexMismatch: PSI and index do not match" plugin error when trying to use library function with T&Any
• KT-51248 Function and parameter names with special symbols have to backticked

IDE. FIR

• KTIJ-20443 FIR IDE: Work in Dumb mode
• KTIJ-21374 FIR IDE: Incorrect highlighting for operators
• KTIJ-21013 FIR IDE: Inconsistent smartcasts highlighting
• KTIJ-21343 FIR IDE: Navigation from explicit invoke call does not work
• KTIJ-20852 FIR IDE: Exception when checking isInheritor on two classes in different modules
• KTIJ-21021 FIR IDE: Completion of extension function does not work on nullable receiver
• KTIJ-20637 FIR IDE: Strange exception while commenting-uncommenting FirReferenceResolveHelper.kt
• KTIJ-20971 FIR IDE: "Parameter Info" shows parameters of uncallable methods

IDE. Gradle Integration

• KTIJ-21807 Gradle to IDEA import: language and API version settings are not imported for Native facet
• KTIJ-21692 Kotlin Import Test maintenance: 1.7.0-Beta
• KTIJ-20567 Kotlin/JS: Gradle import into IDEA creates no proper sub-modules, source sets, facets

IDE. Hints. Inlay

• KTIJ-20552 Support definitely non-null types in inlay hints

IDE. Inspections and Intentions

New Features

• KTIJ-18979 Quickfix for INTEGER_OPERATOR_RESOLVE_WILL_CHANGE to add explicit conversion call
• KTIJ-19950 Provide quickfixes for INVALID_IF_AS_EXPRESSION_WARNING and NO_ELSE_IN_WHEN_WARNING
• KTIJ-19866 Create quick-fix for effective visibility error on private-in-file interface exposing private class
• KTIJ-19939 Provide quickfix for deprecated confusing expressions in when branches

Fixes

• KTIJ-20705 Register quickfix for NO_CONSTRUCTOR_WARNING diagnostic
• KTIJ-21226 "Remove else branch" quick fix is not suggested
• KTIJ-20981 Definitely non-null types: quick-fixes suggested incorrectly for LV=1.6 when Xenhance-type-parameter-types-to-def-not-null flag is set
• KTIJ-20953 Add quickfix for OVERRIDE_DEPRECATION warning to 1.7 - 1.9 migration
• KTIJ-20734 Replace with [@​JvmInline] value quick fix should be appliable on a whole project
• KTIJ-21420 Add 'else' branch quick fix suggestion is displayed twice in case 'if' isn't completed
• KTIJ-21192 "Make protected" intention is redundant for interface properties
• KTIJ-18120 "Make public" intention does not add explicit "public" modifier when using ExplicitApi Strict mode
• KTIJ-20493 "Create expect" quick fix doesn't warn about platform-specific annotations

IDE. Misc

• KTIJ-21582 Notification for Kotlin EAP survey

IDE. Multiplatform

• KT-49523 Improve environment setup experience for KMM projects
• KT-50952 MPP: Commonized cinterops doesn't attach/detach to source set on configuration changes

IDE. Native

• KT-44329 Improve UX of using Native libraries in Kotlin
• KTIJ-21602 With Native Debugging Support plugin Gradle run configurations can't be executed from IDEA: LLDB_NATVIS_RENDERERS_ENABLED

IDE. Wizards

• KTIJ-20919 Update ktor-html-builder dependency in kotlin wizards
• KTIJ-20962 Wizard: Invalid Ktor imports

JavaScript

New Features

• KT-51735 KJS / IR: Minimize member names in production mode

Performance Improvements

• KT-51127 Kotlin/JS - IR generates plenty of useless Unit_getInstance()
• KT-50212 KJS IR: Upcast should be a no-op
• KT-16974 JS: Kotlin.charArrayOf is suboptimal due to Rhino bugs

Fixes

• KT-44319 JS IR BE: Add an ability to generate separate JS files for each module
• KT-52518 Kotlin/JS IR: project with 1.6.21 fails to consume library built with 1.7.0-RC: ISE "Unexpected IrType kind: KIND_NOT_SET" at IrDeclarationDeserializer.deserializeIrTypeData()
• KT-52010 K/JS IR: both flows execute when using elvis operator
• KT-41096 KJS IR: @​JsExport should use original js name for external declarations
• KT-52144 KJS / IR: Missing property definitions for interfaced defined properties
• KT-52252 KJS / IR: overridden properties are undefined/null
• KT-51973 KJS / IR overridden properties of inherited interface missing
• KT-51125 Provide a way to use import keyword in js expressions
• KT-40888 KJS / IR: Missing methods are no longer generated (polyfills)
• KT-50504 KJS / IR: Transpiled JS incorrectly uses the unscrambled names of internal fields
• KT-51853 JS compilation fails with "Uninitialized fast cache info" error
• KT-51205 K/JS IR: external class is mapped to any
• KT-50806 Typescript definitions contain invalid nested block comments with generic parent and type argument without @JsExport
• KT-51841 KJS / IR: No flat hash for FUN FAKE_OVERRIDE with kotlin.incremental.js.ir=true
• KT-51081 KJS / IR + IC: Passing an inline function with default params as a param to a higher-order function crashes the compiler
• KT-51084 KJS / IR + IC: Cache invalidation doesn't check generic inline functions reified qualifier
• KT-51211 K/JS IR: JsExport: Can't export nested enum
• KT-51438 KJS / IR: Duplicated import names for the same external names
• KT-51238 Kotlin/JS: IR + IC: build fails after clean on compileTestDevelopmentExecutableKotlinJs task: "Failed to create MD5 hash for file '.../build/classes/kotlin/main' as it does not exist"
• KT-50674 KJS / IR: JS code cannot modify local variable
• KT-50953 KJS IR: Incorrect nested commenting in d.ts
• KT-15223 JS: function that overrides external function with vararg parameter is translated incorrectly
• KT-50657 KJS / IR 1.6.20-M1-39 - Date in Kotlin JS cannot be created from long.

Language Design

New Features

• KT-45618 Stabilize builder inference
• KT-30485 Underscore operator for type arguments
• KT-49006 Support at least three previous versions of language/API
• KT-16768 Context-sensitive resolution prototype (Resolve unqualified enum constants based on expected type)
• KT-14663 Support having a "public" and a "private" type for the same property
• KT-50477 Functional conversion does not work on suspending functions
• KT-32162 Allow generics for inline classes

Fixes

• KT-12380 Support sealed (exhaustive) whens
• KT-27750 Reverse reservation of 'yield' as keyword
• KT-22956 Release OptIn annotations
• KT-44866 Change behavior of private constructors of sealed classes
• KT-49110 Prohibit access to members of companion of enum class from initializers of entries of this enum
• KT-29405 Switch default JVM target version to 1.8

Libraries

New Features

• KT-50484 Extensions for java.util.Optional in stdlib
• KT-50146 Reintroduce min/max(By/With) operations on collections with non-nullable return type
• KT-46132 Specialized default time source with non-allocating time marks
• KT-41890 Support named capture groups in Regex on Native
• KT-48179 Introduce API to retrieve the number of CPUs the runtime has

Performance Improvements

• KT-42178 Range and Progression should override last()

Fixes

• KT-42436 Support java.nio.Path extension in the standard library
• KT-51470 Stabilize experimental API for 1.7
• KT-51775 JS: Support named capture groups in Regex
• KT-51776 Native: Support back references to groups with multi-digit index
• KT-51082 Introduce Enum.declaringJavaClass property
• KT-51848 Promote deepRecursiveFunction to stable API
• KT-48924 KJS: toString in base 36 produces different results in JS compare to JVM
• KT-50742 Regular expression is fine on jvm but throws PatternSyntaxException for native macosX64 target
• KT-50059 Stop publishing kotlin-stdlib and kotlin-test artifacts under modular classifier
• KT-26678 Rename buildSequence/buildIterator to sequence/iterator

Native

• KT-49406 Kotlin/Native: generate standalone executable for androidNative targets by default
• KT-48595 Enable Native embeddable compiler jar in Gradle plugin by default
• KT-51377 Native: synthetic forward declarations are preferred over commonized definitions
• KT-49145 Kotlin/Native static library compilation fails for androidNative*
• KT-49496 Gradle (or the KMM plugin) is caching the Xcode Command Line Tools location
• KT-49247 gradle --offline should translate into airplaneMode for kotin-native compiler

Native. Build Infrastructure

• KT-52259 kotlin-native releases from GitHub don't contain platform libs

Native. C and ObjC Import

• KT-49455 Methods from Swift extensions are not resolved in Kotlin shared module
• KT-50648 Incorrect KMM cinterop conversion

Native. ObjC Export

• KT-50982 RuntimeAssertFailedPanic in iOS when Kotlin framework is initialized before loading
• KT-49937 Kotlin/Native 1.5.31: 'runtime assert: Unexpected selector clash' when 'override fun toString(): String' is used

Native. Platforms

• KT-52232 Kotlin/Native: simplify toolchain dependency override for MinGW

Native. Runtime

• KT-52365 Kotlin/Native fails to compile projects for 32-bit targets when new memory manager is enabled

Native. Runtime. Memory

• KT-48537 Kotlin/Native: improve GC triggers in the new MM.
• KT-50713 Kotlin/Native: Enable Concurrent Sweep GC by default

Native. Stdlib

• KT-50312 enhancement: kotlin native -- add alloc<TVarOf<T>>(T)

Native. Testing

• KT-50316 Kotlin/Native: Produce a list of available tests alongside the final artifact
• KT-50139 Create tests for Enter/Leave frame optimization

Reflection

• KT-27598 "KotlinReflectionInternalError" when using callBy on constructor that has inline class parameters
• KT-31141 IllegalArgumentException when reflectively accessing nullable property of inline class type

Tools. CLI

• KT-52409 Report error when use-k2 with Multiplatform
• KT-51717 IllegalArgumentException: Unexpected versionNeededToExtract (0) in 1.6.20-RC2 with useFir enabled
• KT-52217 Rename 'useFir' to 'useK2'
• KT-29974 Add a compiler option '-Xjdk-release' similar to javac's '--release' to control the target JDK version
• KT-51673 Make language version description not in capital letters
• KT-48833 -Xsuppress-version-warnings allows to suppress errors about unsupported versions
• KT-51627 kotlinc fails with java.lang.RuntimeException if /tmp/build.txt file exists on the disk
• KT-51306 Support reading language settings from an environment variable and overriding the current settings by them
• KT-51093 "-Xopt-in=..." command line argument no longer works

Tools. Commonizer

• KT-43309 Overwrite return type and parameter types of callable member to succeed commonization
• KT-52050 [Commonizer] 'platform.posix.DIR' not implementing 'CPointed' when commonized for 'nativeMain' on linux or windows hosts
• KT-51224 MPP: For optimistically commonized numbers missed kotlinx.cinterop.UnsafeNumber
• KT-51215 MPP: Update Kdoc description for kotlinx.cinterop.UnsafeNumber
• KT-51686 Cinterop: Overload resolution ambiguity in 1.6.20-RC2
• KT-46636 HMPP: missed classes from platform.posix.*
• KT-51332 Optimistic number commonization is disabled by default in KGP with enabled HMPP

Tools. Compiler Plugins

• KT-50992 jvm-abi-gen breaks inline functions in inline classes with private constructors in Kotlin 1.6.20

Tools. Daemon

• KT-32885 KT. Kotlin daemon compilation process is broken: java.lang.IllegalStateException Service is dying at entities generation by Kotlin.kts script

Tools. Gradle

New Features

• KT-49227 Support Gradle plugins variants
• KT-50869 Provide API that allow AGP to set up Kotlin compilation
• KT-48008 Consider offering a KotlinBasePlugin
• KT-52030 Provide experimental possibility to view internal information about Kotlin Compiler performance

Performance Improvements

• KT-52141 Optimize Java class snapshotting for the kotlin.incremental.useClasspathSnapshot feature
• KT-51978 Optimize classpath snapshot cache for the kotlin.incremental.useClasspathSnapshot feature
• KT-51326 Kotlin-gradle-plugin performance issue with mass java SourceRoots

Fixes

• KT-52448 Compilation tasks are missing input/output/internal annotations on includes/excludes properties
• KT-52239 Type based task configuration-blocks for JVM stopped working in Gradle
• KT-52313 No recompilation in Gradle after adding or removing function parameters, removing functions (and maybe more) in dependent modules
• KT-51854 Add Ktor to gradle performance benchmark
• KT-52086 Rename flag 'use-fir' to 'use-k2'
• KT-52509 Main variant published to Gradle plugin portal uses unshadowed artifact
• KT-52392 Gradle: 1.7.0 does not support custom gradle build configuration on Windows OS
• KT-32805 KotlinCompile inherits properties sourceCompatibility and targetCompatibility which breaks Gradle's incremental compilation
• KT-52189 Provide Gradle Kotlin/DSL friendly deprecated classpath property in KotlinCompiler task
• KT-51415 Confusing build failure reason is displayed in case kapt is used and different JDKs are used for compileKotlin and compileJava tasks
• KT-52187 New IC can not be enabled in an Android project using kapt
• KT-51898 Upgrading Kotlin/Kotlin Gradle plugin to 1.5.3 and above breaks 'com.android.asset-pack' plugin
• KT-51913 Gradle plugin should not add attributes to the legacy configurations
• KT-34862 Restoring from build cache breaks Kotlin incremental compilation
• KT-45777 New IC in Gradle
• KT-51360 Show performance difference in percent between releases
• KT-51380 Add open-source project using Kotlin/JS plugin to build regression benchmarks
• KT-51937 Toolchain usage with configuration cache prevents KotlinCompile task to be UP-TO-DATE
• KT-48276 Remove kotlin2js and kotlin-dce-plugin
• KT-52138 KSP could not access internal methods/properties in Kotlin Gradle Plugin
• KT-51342 Set minimal supported Android Gradle plugin version to 3.6.4
• KT-50494 Remove kotlin.experimental.coroutines Gradle DSL option
• KT-49733 Bump minimal supported Gradle version to 6.7.1
• KT-48831 Remove 'KotlinGradleSubplugin'
• KT-47924 Remove annoying cast in toolchain extension method for Kotlin DSL
• KT-46541 Fail Gradle builds when deprecated kotlinOptions.jdkHome is set
• KT-51830 Gradle: deprecate kotlin.compiler.execution.strategy system property
• KT-47763 Gradle DSL: Remove deprecated useExperimentalAnnotation and experimentalAnnotationInUse
• KT-51374 NoSuchFileException in getOrCreateSessionFlagFile()
• KT-51837 kotlin-gradle-plugin:1.6.20 fails xray scan on shadowed Gson 2.8.6.
• KT-51454 KotlinJvmTest is not a cacheable task
• KT-45745 Migrate only Kotlin Gradle Plugin tests to new JUnit5 DSL and run them separately on CI
• KT-47318 Rem

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