-[`KT-4481`](https://youtrack.jetbrains.com/issue/KT-4481) compareTo on primitive floats/doubles should behave naturally
-[`KT-11016`](https://youtrack.jetbrains.com/issue/KT-11016) Allow to annotate internal API to be used inside public inline functions
-[`KT-11128`](https://youtrack.jetbrains.com/issue/KT-11128) Member vs SAM conversion with more specific signature
-[`KT-12215`](https://youtrack.jetbrains.com/issue/KT-12215) Allowing to access protected members in public inline members creates potential binary compatibility problem
-[`KT-12531`](https://youtrack.jetbrains.com/issue/KT-12531) Report error when delegated member hides a supertype member
-[`KT-14650`](https://youtrack.jetbrains.com/issue/KT-14650) mod function on integral types is inconsistent with BigInteger.mod
-[`KT-14651`](https://youtrack.jetbrains.com/issue/KT-14651) Floating point comparisons shall operate according to IEEE754
-[`KT-14852`](https://youtrack.jetbrains.com/issue/KT-14852) It should not be possible to use typealias that abbreviates a generic projection as a constructor
-[`KT-15226`](https://youtrack.jetbrains.com/issue/KT-15226) Restrict delegation to java 8 default methods
### Reflection
-[`KT-12250`](https://youtrack.jetbrains.com/issue/KT-12250) Provide API for getting a single annotation by its class
-[`KT-14939`](https://youtrack.jetbrains.com/issue/KT-14939) VerifyError in accessors for bound property reference with receiver 'null'
### Compiler
#### Coroutines
- Major coroutines redesign - see [`KEEP`](https://github.com/Kotlin/kotlin-coroutines/blob/master/kotlin-coroutines-informal.md) for details
#### Optimizations
-[`KT-11734`](https://youtrack.jetbrains.com/issue/KT-11734) Optimize const vals by inlining them at call site
-[`KT-13570`](https://youtrack.jetbrains.com/issue/KT-13570) Generate TABLE/LOOKUPSWITCH if all when branches are const integer values
-[`KT-14746`](https://youtrack.jetbrains.com/issue/KT-14746) Captured Refs should not be volatile
-[`KT-12144`](https://youtrack.jetbrains.com/issue/KT-12144) Type inference incorporation error on SAM adapter call
-[`KT-14196`](https://youtrack.jetbrains.com/issue/KT-14196) Do not allow class literal with expression in annotation arguments
-[`KT-14453`](https://youtrack.jetbrains.com/issue/KT-14453) Regression: Type inference failed: inferred type is T but T was expected
-[`KT-14774`](https://youtrack.jetbrains.com/issue/KT-14774) Incorrect inner class modifier generated for sealed inner classes
-[`KT-14839`](https://youtrack.jetbrains.com/issue/KT-14839) CompilationException when calling inline fun with first arg of 2 (w/defaults) within catch block of Java exception type
-[`KT-14855`](https://youtrack.jetbrains.com/issue/KT-14855) Projection in type aliases should be allowed in supertypes and constructor invocations if they expand to non-toplevel projections
-[`KT-14887`](https://youtrack.jetbrains.com/issue/KT-14887) Unhelpful error "public-API inline function cannot access non-public-API" for unresolved call inside inline function
-[`KT-14930`](https://youtrack.jetbrains.com/issue/KT-14930) Android: creating Kotlin activity: UOE at EmptyList.removeAll()
-[`KT-15146`](https://youtrack.jetbrains.com/issue/KT-15146) Kapt3 no source files on unittest
-[`KT-15272`](https://youtrack.jetbrains.com/issue/KT-15272) Exception when building 2 projects at the same time
### JavaScript backend
#### dynamic type
-[`KT-8207`](https://youtrack.jetbrains.com/issue/KT-8207) Extension function on dynamic resolves on any type
-[`KT-6579`](https://youtrack.jetbrains.com/issue/KT-6579) JS: prohibit to use `in` and `!in` on dynamic
-[`KT-6580`](https://youtrack.jetbrains.com/issue/KT-6580) JS: prohibit to use more than one argument in indexed access on dynamic
-[`KT-13615`](https://youtrack.jetbrains.com/issue/KT-13615) JS: don't generate guard for catch with dynamic type
#### @native/external
-[`KT-13893`](https://youtrack.jetbrains.com/issue/KT-13893) JS: Replace @native annotation with external modifier
-[`KT-12877`](https://youtrack.jetbrains.com/issue/KT-12877) Allow to specify module for native JS declarations
-[`KT-14806`](https://youtrack.jetbrains.com/issue/KT-14806) JS: name of a local variable clashes with native declaration from global scope
#### Diagnostics
-[`KT-13889`](https://youtrack.jetbrains.com/issue/KT-13889) JS: prohibit overriding native functions with default values assigned to parameters
-[`KT-14033`](https://youtrack.jetbrains.com/issue/KT-14033) JS: don't optimize (based on type information) by default expressions with any of "as, is, !is, as?, ?., !!"
-[`KT-13616`](https://youtrack.jetbrains.com/issue/KT-13616) JS: don't omit guard for catch with Throwable type
-[`KT-12976`](https://youtrack.jetbrains.com/issue/KT-12976) JS: human-friendly error message on wrong modules order
-[`KT-15212`](https://youtrack.jetbrains.com/issue/KT-15212) JS: link unqualified names in `js(...)` function to local functions in outer Kotlin function by name
-[`KT-14750`](https://youtrack.jetbrains.com/issue/KT-14750) JS: remove unnecessary functions from kotlin.js
#### Bugfixes
-[`KT-12566`](https://youtrack.jetbrains.com/issue/KT-12566) JS: inner local class should refer to captured variables via its outer class
-[`KT-12527`](https://youtrack.jetbrains.com/issue/KT-12527) Reified is-check works wrongly for chained calls
-[`KT-12586`](https://youtrack.jetbrains.com/issue/KT-12586) JS: compiler crashes when call inline function inside string templeate
-[`KT-13164`](https://youtrack.jetbrains.com/issue/KT-13164) Ecma TypeError on extending local class from inner one
-[`KT-14888`](https://youtrack.jetbrains.com/issue/KT-14888) JS: Compiler error: Cannot get FQ name of local class: lazy class <nonameprovided>
-[`KT-14999`](https://youtrack.jetbrains.com/issue/KT-14999) JS: Operator set + labeled lambdas
-[`KT-15007`](https://youtrack.jetbrains.com/issue/KT-15007) JS: Dies when checking if exception implements interface. TypeError: Cannot read property 'baseClasses' of undefined
-[`KT-15073`](https://youtrack.jetbrains.com/issue/KT-15073) KT to JS losing extension function's receiver
-[`KT-15169`](https://youtrack.jetbrains.com/issue/KT-15169) JS: compiler fails on annotated expression with TRE at Translation.doTranslateExpression()
-[`KT-13522`](https://youtrack.jetbrains.com/issue/KT-13522) JS: can't use captured reified type paramter in jsClass
-[`KT-13784`](https://youtrack.jetbrains.com/issue/KT-13784) JS: lambda was not inlined for function with reified parameter declared in another module
-[`KT-13792`](https://youtrack.jetbrains.com/issue/KT-13792) JS: inner class of local class does not capture enclosing class properly
-[`KT-15327`](https://youtrack.jetbrains.com/issue/KT-15327) JS: Enum `valueOf` should throw IllegalArgumentException
### Standard library
-[`KT-7930`](https://youtrack.jetbrains.com/issue/KT-7930) Make String.toInt(), toLong(), etc. nullable instead of throwing exception
-[`KT-8220`](https://youtrack.jetbrains.com/issue/KT-8220) Add #peek method to Sequence similar to Stream.peek
-[`KT-8286`](https://youtrack.jetbrains.com/issue/KT-8286) Int.toString and String.toInt with base as parameter
-[`KT-14034`](https://youtrack.jetbrains.com/issue/KT-14034) JS: unsafeCast function
-[`KT-15181`](https://youtrack.jetbrains.com/issue/KT-15181) Some source files are missing from published sources on Bintray
### IDE
###### Issues fixed
-[`KT-14693`](https://youtrack.jetbrains.com/issue/KT-14693) Introduce Type Alias: Do not suggest type qualifiers
-[`KT-14696`](https://youtrack.jetbrains.com/issue/KT-14696) Introduce Type Alias: Fix NPE during dialog repaint
-[`KT-14685`](https://youtrack.jetbrains.com/issue/KT-14685) Introduce Type Alias: Replace type usages in constructor calls
-[`KT-14861`](https://youtrack.jetbrains.com/issue/KT-14861) Introduce Type Alias: Support callable references/class literals
-[`KT-15204`](https://youtrack.jetbrains.com/issue/KT-15204) Implement navigation from header to its implementation and vice versa
-[`KT-15269`](https://youtrack.jetbrains.com/issue/KT-15269) Quickfix for external (native) extension declarations
-[`KT-15293`](https://youtrack.jetbrains.com/issue/KT-15293) Add 1.1 EAP repository when creating a new Gradle project with 1.1 EAP