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2.13.17 regression: scala.MatchError: ?F[Any, β$1$]

fixed in Scala 3This issue does not exist in the Scala 3 compiler (https://github.com/lampepfl/dotty/)This issue does not exist in the Scala 3 compiler (https://github.com/lampepfl/dotty/)

regression

typer

Status: Open.

#13141 In scala/bug;

· neko-kai opened on Nov 13, 2025

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2.13.19

Missing <code>acc_varargs</code> flag when overriding a Java varargs method

fixed in Scala 3This issue does not exist in the Scala 3 compiler (https://github.com/lampepfl/dotty/)This issue does not exist in the Scala 3 compiler (https://github.com/lampepfl/dotty/)

java interop

varargs

Status: Open.

#13137 In scala/bug;

· lrytz opened on Oct 27, 2025

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Backlog

False "cannot override a concrete member" error when referencing Scala 3 code

tastyreader

Status: Open.

#13135 In scala/bug;

· jadenPete opened on Oct 24, 2025

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2.13.19

Scala 3 case class with varargs parameter can't be constructed in Scala 2

tastyreader

Status: Open.

#13126 In scala/bug;

· jadenPete opened on Oct 1, 2025

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2.13.19

Cross-version inheritance hierarchy crashes compiler

tastyreader

Status: Open.

#13125 In scala/bug;

· jadenPete opened on Oct 1, 2025

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2.13.19

Unsupported generic tuple error when using Scala 3 code in Scala 2

tastyreader

Status: Open.

#13124 In scala/bug;

· jadenPete opened on Sep 22, 2025

· 

2.13.19

Bad type inference for java stream's <code>toArray</code>

fixed in Scala 3This issue does not exist in the Scala 3 compiler (https://github.com/lampepfl/dotty/)This issue does not exist in the Scala 3 compiler (https://github.com/lampepfl/dotty/)

Status: Open.

#13123 In scala/bug;

· He-Pin opened on Sep 22, 2025

Subclasses of Scala 3 classes falsely flagged as missing implementations

tastyreader

Status: Open.

#13122 In scala/bug;

· jadenPete opened on Sep 19, 2025

· 

2.13.19

Another escape hatch for missing backtick in pattern lint

lint

Status: Open.

#13120 In scala/bug;

· som-snytt opened on Sep 13, 2025

Certain concrete type projections written in Scala 3 can't be used in Scala 2

tastyreader

Status: Open.

#13114 In scala/bug;

· jadenPete opened on Aug 12, 2025

· 

2.13.19

Certain type aliases written in Scala 3 can't be used in Scala 2

tastyreader

Status: Open.

#13113 In scala/bug;

· jadenPete opened on Aug 11, 2025

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2.13.19

-Wtostring-interpolated warns on an if expression of type String

lint

Status: Open.

#13107 In scala/bug;

· johnduffell opened on Jun 13, 2025

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Backlog