Issues

• Spurious separation checking error when receiver is used in a readonly way

  area:experimental:ccitype:bug
  scala/scala3#27536 · Filter by author Linyxus opened on Nov 8, 2026

• Mutable classes cannot mutate parameters in a non-update method

  area:experimental:ccitype:bug
  scala/scala3#27534 · Filter by author Linyxus opened on Nov 8, 2026

• Spurious and order-dependent consume error for consumable class members

  area:experimental:ccitype:bug
  scala/scala3#27533 · Filter by author Linyxus opened on Nov 8, 2026

• Pattern matcher emits an outer test that the scrutinee's type already rules out

  stat:needs triage
  scala/scala3#27530 · Filter by author retronym opened on Nov 8, 2026

• scaladoc: Cannot easily link to scala.None documentation via -external-mapping option

  itype:bugstat:needs triage
  scala/scala3#27529 · Filter by author Facsimiler opened on Nov 8, 2026

• Coverage: nested classes with the same name get the same full class name

  itype:bugstat:needs triage
  scala/scala3#27506 · Filter by author manufacturist opened on Nov 6, 2026

• Inherited members are invisible while a class's parents are typed, and lookups silently bind elsewhere

  itype:bugstat:needs triage
  scala/scala3#27504 · Filter by author retronym opened on Nov 5, 2026

• Zinc recompiles unchanged sources on every run in 3.9.0: inline-derived anonymous classes are recorded under non-existent names (Foo$_$_$$anon) and attributed to library jars

  itype:bugstat:needs triage
  scala/scala3#27496 · Filter by author ubourdon opened on Nov 3, 2026
  2

• Missing compile-time check for extending Java sealed types not in permits

  itype:bugstat:needs triage
  scala/scala3#27492 · Filter by author warcholjakub opened on Nov 3, 2026
  

• Compiler crashes when recompiling classes that extends a separately compiled inline trait

  itype:bugitype:crashstat:needs triage
  scala/scala3#27490 · Filter by author AragornXu opened on Nov 3, 2026

• AssertionError in ClassfileParser.enterOwnInnerClasses with -release and a multi-release JAR on the classpath (regression in 3.9.0)

  area:jdkitype:crashstat:fixed in next
  scala/scala3#27486 · Filter by author maxcom opened on Nov 2, 2026
  1

• -opt-inline does a terrible job at inlining the Array methods (exponential code blowup past method bytecode limit)

  itype:bugstat:needs triage
  scala/scala3#27479 · Filter by author strelec opened on Oct 31, 2026
  6

  

• -Ymagic-offset-header does not support relative paths

  area:parseritype:bug
  scala/scala3#27467 · Filter by author lefou opened on Oct 30, 2026
  2

  

• 3.10.1-RC2 release procedure

  area:releasesitype:meta
  scala/scala3#27465 · Filter by author WojciechMazur opened on Oct 30, 2026
  

• Inline trait method loses access to some private members

  area:experimental:inline-traitsitype:bug
  scala/scala3#27447 · Filter by author AragornXu opened on Oct 28, 2026
  2

• dropForMap drops side-effecting givens

  area:implicitsitype:bug
  scala/scala3#27437 · Filter by author som-snytt opened on Oct 27, 2026
  1

  

• CyclicReference in erasure when a top-level opaque type with type parameters is entered from -sourcepath and completed late

  area:incremental-compilationitype:bugitype:crashregression
  scala/scala3#27408 · Filter by author retronym opened on Oct 26, 2026
  1

• CC: Inheritance inconsistency between fresh and fresh.rd

  area:experimental:ccitype:bug
  scala/scala3#27398 · Filter by author bracevac opened on Oct 24, 2026

• CC: Classifiers: A new instance is classified by its classifier fields alone, ignoring an unclassified field.

  area:experimental:ccitype:bug
  scala/scala3#27397 · Filter by author bracevac opened on Oct 24, 2026
  3

  

• CC: Adding to already tracked type drops capabilities

  area:experimental:ccitype:bug
  scala/scala3#27396 · Filter by author bracevac opened on Oct 24, 2026

• CC: Meet with a capture-set quantifier is always empty

  area:experimental:ccitype:bug
  scala/scala3#27394 · Filter by author bracevac opened on Oct 24, 2026

• CC: Intersections of tracked types are pure

  area:experimental:ccitype:bug
  scala/scala3#27393 · Filter by author bracevac opened on Oct 24, 2026

• CC: Read-only capture set with an inferred X lets a writer through

  area:experimental:ccarea:experimental:separation-checkingitype:bug
  scala/scala3#27392 · Filter by author bracevac opened on Oct 24, 2026

• CC: Bad interaction with inline - boundary/break leaks

  area:experimental:ccarea:experimental:separation-checkingitype:bug
  scala/scala3#27390 · Filter by author bracevac opened on Oct 24, 2026
  

• CC: Bad capture bounds

  area:experimental:ccitype:bug
  scala/scala3#27389 · Filter by author bracevac opened on Oct 24, 2026