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Issues list

Wrong ClassTag when tuple is defined using *: area:typeclass-derivation itype:bug
#23195 opened May 20, 2025 by eejbyfeldt
Match type fails to reduce in a simple case area:match-types area:typeclass-derivation itype:bug
#23159 opened May 14, 2025 by keynmol
3
Is it expected that summonInline seems to return not as precise type as summon? area:inline area:typeclass-derivation itype:question
#23134 opened May 11, 2025 by DmytroMitin
4
E161 naming error during second compilation of project area:typeclass-derivation itype:bug
#23043 opened Apr 24, 2025 by rssh
1
4
Improve error: the pattern contains an unaccounted type parameter area:match-types area:pattern-matching area:typeclass-derivation better-errors Issues concerned with improving confusing/unhelpful diagnostic messages itype:bug
#22943 opened Apr 8, 2025 by TomasMikula
10
Mirror.SumOf contains more types than typer thinks are members of a sealed trait area:typeclass-derivation itype:bug
#22885 opened Mar 28, 2025 by mrdziuban
2
Refinement on using Mirror not checked when automatically deriving mirrors area:typeclass-derivation itype:bug
#22851 opened Mar 21, 2025 by eejbyfeldt
1
Changing the definition of a class doesn't force re-comp of derived givens in other files area:implicits related to implicits area:typeclass-derivation itype:bug stat:needs minimization Needs a self contained minimization
#22475 opened Jan 29, 2025 by j-mie6
1
Changes to a case class don't invalidate sources that depend on its Mirror area:incremental-compilation area:typeclass-derivation itype:bug
#22178 opened Dec 9, 2024 by mrdziuban
3
It is possible to summon an invalid refined mirror area:typeclass-derivation itype:bug
#22161 opened Dec 8, 2024 by kubukoz
Incrementally compiled code that iterates over Mirror's MirroredElemTypes in a macro sometimes dealiases an opaque type to its underlying type area:typeclass-derivation itype:bug stat:needs minimization Needs a self contained minimization
#21430 opened Aug 24, 2024 by arainko
Narrowing the type of MirroredElemLabels is not equivalent to using <:< area:typeclass-derivation itype:bug
#20307 opened May 1, 2024 by arainko
1
Can't use derives to derive an opaque type, yields "is not a class type" area:implicits related to implicits area:opaque-types area:typeclass-derivation itype:language enhancement needs-sip A SIP needs to be raised to move this issue/PR along.
#19945 opened Mar 14, 2024 by mrdziuban
3
CanEqual is undefined by default for unions? area:typeclass-derivation backlog No work planned on this by the core team for the time being. itype:enhancement
#19193 opened Dec 4, 2023 by soronpo
8
Compiler crash using F-bounded polymorphism and typeclass derivation area:typeclass-derivation itype:bug itype:crash
#18670 opened Oct 9, 2023 by PawkyPenguin
2
Typeclass derivation fails with no useful information area:inline area:reporting Error reporting including formatting, implicit suggestions, etc area:typeclass-derivation itype:enhancement
#18166 opened Jul 7, 2023 by pmeheut
9
Cannot use derives when typeclasses have the same name area:typeclass-derivation itype:enhancement
#17328 opened Apr 23, 2023 by kyri-petrou
4
StackOverflowError when summoning a Mirror.Of within Companion object nested in method area:typeclass-derivation itype:bug
#16873 opened Feb 9, 2023 by zarthross
5
derives CanEqual fails if there are interparameter dependencies area:typeclass-derivation itype:bug
#16171 opened Oct 11, 2022 by Sporarum
How to support Mirrors for Generic Tuples arity +22 area:typeclass-derivation itype:enhancement
#15398 opened Jun 8, 2022 by bishabosha
9
generic tuple not of subtype of ProductN area:library Standard library area:typeclass-derivation itype:enhancement stat:needs spec
#15253 opened May 20, 2022 by m8nmueller
10
Tuple.Zip not able to handle more than 22 elements area:typeclass-derivation itype:bug stat:needs minimization Needs a self contained minimization
#15043 opened Apr 27, 2022 by chungonn
3
Let mirrors support default parameters area:typeclass-derivation Semester Project Good project to be done by an MSc or strong Bsc computer science student in one semester stat:taken This project is already worked on by a student or as part of another volunteership program
#14409 opened Feb 3, 2022 by odersky Future versions
2
synthetic Mirror methods become visible when from classpath dependency area:typeclass-derivation itype:bug
#13815 opened Oct 25, 2021 by bishabosha
1
5
Mirror.SumOf not being provided when 0 inhabitants area:typeclass-derivation itype:enhancement
#11764 opened Mar 16, 2021 by japgolly
1
@bishabosha
17
ProTip! Adding no:label will show everything without a label.