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The Scala 3 compiler, also known as Dotty.

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Inspired by the shapeless-2 codebase, as I was looking what still remains to be done there and run into problems with type-level natural numbers implementation there. ## Compiler version 3.2.1-RC1-bin-20220805-e560c2d-NIGHTLY,...

itype:bug
area:typer

I've created this as a follow-up to the discussion started in [the contributor forum](https://contributors.scala-lang.org/t/revisiting-dotty-diagnostics-for-tooling/5649). Since there was no push back, I've gone ahead and started the process. I'll use this...

area:tooling

Cleaned up version of https://github.com/lampepfl/dotty/pull/14545 Implementing the new lazy vals scheme mentioned in https://github.com/lampepfl/dotty/pull/6979, fixing https://github.com/lampepfl/dotty/issues/7140 New PR to avoid force pushing to main branch of the previous author. Fixes...

Rebase of #11492 to the latest `main`. At Scala Center, we're planning to bring this over the finish line. /cc @Kordyjan

## Compiler version 3.2.0-RC1 It was working on version 3.1.3 ## Minimized code ```Scala package json.value.spec.parser import java.math.MathContext import com.github.plokhotnyuk.jsoniter_scala.core.JsonReader case class DecimalConf(mathContext: MathContext, scaleLimit: Int, digitsLimit: Int) object DecimalConf...

itype:bug
itype:crash
stat:needs minimization
area:coverage

## Compiler version 3.1.3 ## Minimized code ```Scala object EB: type Outcome = Command | SideEffect | CmdEffect type OutcomeSpec = Command | (() => Unit) | (() => Seq[Command])...

itype:bug
area:typer
regression

## Compiler version 3.1.3 and 3.2.0-RC1 on Scastie ## Minimized code ```Scala object A { class Builder[K, V](creator: K => V) { def build(k: K): V = creator(k) } case...

itype:bug
stat:needs spec
area:initialization

Community build regression for https://github.com/ciaraobrien/dottytags (maintainer @ciaraobrien) Based on [Open Community Build #1858](https://scala3.westeurope.cloudapp.azure.com/job/buildCommunityProject/1858/) Part of https://github.com/lampepfl/dotty/issues/15647 regressions tracker ## Compiler version Works with 3.1.0 Fails in 3.1.1 Fails in 3.2.1-RC1-bin-20220712-7e20b81-NIGHTLYon`...

itype:bug
area:metaprogramming:quotes

Based on failure in [Open Community Build #8358](https://scala3.westeurope.cloudapp.azure.com/job/buildCommunityProject/8358) in library https://github.com/sirthias/borer Scala 3.1.3 builds were stable when compiling derivation tests using -Xss=2m, however, in Scala 3.2.0-RCx they end up with...

itype:performance
stat:needs minimization
area:typeclass-derivation