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SeqOps.indexOfSlice defaults to using this.tail even for sequences other than LinearSeq!

library:collections

Status: Open.

#13171 In scala/bug;

· noresttherein opened on Apr 5, 2026

Error when matching against sugared Function0[_]

Status: Open.

#13170 In scala/bug;

· noresttherein opened on Apr 4, 2026

Type mismatch when unapply returns a type parameterized with a singleton type

Status: Open.

#13169 In scala/bug;

· noresttherein opened on Apr 4, 2026

Unbound wildcard type when matching with @unchecked

Status: Open.

#13168 In scala/bug;

· noresttherein opened on Apr 4, 2026

Incorrect warning about erasure when matching against type alias A[X] = Array[X]

Status: Open.

#13167 In scala/bug;

· noresttherein opened on Apr 3, 2026

Vacuous test in LongMap likely results in incorrect behavior

help wanted

library:collections

Status: Open.

#13166 In scala/bug;

· Ichoran opened on Mar 27, 2026

·  

2.13.19

False positive compile type mismatch error for 2.13.x and 2.12.x

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/)

infer

Status: Open.

#13164 In scala/bug;

· geny200 opened on Mar 6, 2026

·  

Backlog

Compiler crashes when using a combination of by name parameter, default parameter, and empty argument list

compiler crash

Status: Open.

#13162 In scala/bug;

· Alex1005a opened on Feb 27, 2026

·  

Backlog

Path generated for implicit conversion leads to NoSuchMethodError

implicit

Status: Open.

#13160 In scala/bug;

· lrytz opened on Feb 25, 2026

·  

2.13.19

Scaladoc diagrams stying and links broken on 2.13

scaladoc tool

Status: Open.

#13157 In scala/bug;

· lrytz opened on Feb 23, 2026

·  

Backlog

Inliner incorrectly modifies IINC on parameters

optimizer

Status: Open.

#13156 In scala/bug;

· SolalPirelli opened on Feb 20, 2026

·  

2.13.19

Compiler hangs during patmat analysis

compiler crash

patmat

Status: Open.

#13154 In scala/bug;

· Christewart opened on Feb 11, 2026