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Regression: Explicit Nulls & Flexible Types

area:nullability

area:private optionsIssues tied to -Y private/internal compiler settings.Issues tied to -Y private/internal compiler settings.

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#24693 In scala/scala3;

· by marcinzh was closed on Dec 9, 2025

multiple <code>@nowarn</code> annotation does not work since Scala 3.7.0

better-errorsIssues concerned with improving confusing/unhelpful diagnostic messagesIssues concerned with improving confusing/unhelpful diagnostic messages

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#23651 In scala/scala3;

· by xuwei-k was closed on Aug 6, 2025

False positive unused warnings in 3.7 nightly on implicits in method overrides

area:implicitsrelated to implicitsrelated to implicits

area:lintingLinting warnings enabled with -W or -XlintLinting warnings enabled with -W or -Xlint

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#22895 In scala/scala3;

· by mrdziuban was closed on Apr 3, 2025

·  

3.7.1

Regression in <code>benhutchison/scalaswingcontrib</code>

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#22062 In scala/scala3;

· by WojciechMazur was closed on Jan 13, 2025

·  

3.6.4

Regression: "a match type could not be fully reduced" when flattening a list of tuples

area:match-types

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Not planned (skipped).

#22022 In scala/scala3;

· by hegetim was closed on Jan 17, 2025

Evaluation of invalid Function crashes Scala

area:transform

itype:bug

itype:crash

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#21952 In scala/scala3;

· by ghost was closed on Nov 19, 2024

·  

3.6.3

Enabling <code>-experimental</code> introduces compiler crash in transparent inline macro

area:experimental

area:metaprogramming:quotesIssues related to quotes and splicesIssues related to quotes and splices

area:parser

area:typer

itype:bug

itype:crash

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#21802 In scala/scala3;

· by WojciechMazur was closed on Nov 14, 2024

·  

3.6.3

Regressions in <code>fingo/spata</code> for match types

area:typer

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

stat:needs spec

Status: Open.

#21013 In scala/scala3;

· WojciechMazur opened on Jul 4, 2024

Compilation performance regression on 3.4.0

area:inline

area:metaprogramming:reflectionIssues related to the quotes reflection APIIssues related to the quotes reflection API

itype:performance

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

stat:needs minimizationNeeds a self contained minimizationNeeds a self contained minimization

Status: Closed (completed).

#19924 In scala/scala3;

· by OlegYch was closed on May 7, 2024

·  

3.5.0

Regression in <code>tarao/record4s</code> - transparent inline looses type dependent type info in match

area:inline

area:typer

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#19623 In scala/scala3;

· by WojciechMazur was closed on Feb 27, 2024

·  

3.4.2

REPL gives stack overflow during too eager syntax highlighting, e.g. when multiplying string

area:repl

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#16904 In scala/scala3;

· by bjornregnell was closed on Mar 26, 2024

·  

3.4.2

Regression on Tuple.Union when using Tuple.toList

area:match-types

itype:bug

regressionThis worked in a previous version but doesn't anymoreThis worked in a previous version but doesn't anymore

Status: Closed (completed).

#16583 In scala/scala3;

· by hmf was closed on Jul 3, 2023

·  

3.4.0