Issues

• Empty PATH process spec fails on macOS (as it should)

  kind:bugplatform:darwin
  Bug

  crystal-lang/crystal#17895 · Filter by author ysbaddaden opened on Nov 9, 2026

• Add annotation to add weak linkage to a fun

  kind:featurestatus:discussiontopic:compiler:codegen
  crystal-lang/crystal#17885 · Filter by author BlobCodes opened on Nov 8, 2026
  1

• Suggestion: Config file for compiler

  kind:feature
  Feature

  crystal-lang/crystal#17881 · Filter by author HCLarsen opened on Nov 7, 2026

• Stale type narrowing together with generic

  kind:bugtopic:compiler:semantic
  Bug

  crystal-lang/crystal#17878 · Filter by author yxhuvud opened on Nov 7, 2026
  1

• Man pages reference nonexistent --target-triple option

  kind:docstopic:compiler:cli
  crystal-lang/crystal#17846 · Filter by author renich opened on Nov 6, 2026
  1

• Crystal parser allows name with a newline after def self.

  kind:bugtopic:compiler:parser
  Bug

  crystal-lang/crystal#17767 · Filter by author Sija opened on Oct 30, 2026

• Parameter versus free variable in x : T.class forall T when x is virtual

  kind:docsstatus:discussiontopic:lang:type-system
  crystal-lang/crystal#17766 · Filter by author HertzDevil opened on Oct 30, 2026
  3

• A new method to get an object's type name

  kind:featuretopic:stdlib
  Feature

  crystal-lang/crystal#17765 · Filter by author HertzDevil opened on Oct 30, 2026
  6

• Regular CI failures

  kind:specs
  Task

  crystal-lang/crystal#17764 · Filter by author straight-shoota opened on Oct 30, 2026
  3

• Interpreter: Repl#run_code prints a wrong value when a top-level variable is closured

  crystal-lang/crystal#17739 · Filter by author jochenseeber opened on Oct 27, 2026

• Add an overall request timeout to HTTP::Client

  crystal-lang/crystal#17738 · Filter by author jochenseeber opened on Oct 27, 2026

• Closing a socket in parallel breaks later sockets with the polling event loop

  kind:bugtopic:stdlib:runtime
  Bug

  crystal-lang/crystal#17730 · Filter by author jochenseeber opened on Oct 27, 2026

• Redefining a method with a restricted splat and a required named parameter adds an overload

  crystal-lang/crystal#17691 · Filter by author jochenseeber opened on Oct 21, 2026

• Log::AsyncDispatcher hangs after a backend raises

  kind:bugtopic:stdlib:log
  Bug

  crystal-lang/crystal#17686 · Filter by author jochenseeber opened on Oct 21, 2026

• Class variables of value type always passed by value when instance variables aren't

  status:discussiontopic:compiler:semantic
  crystal-lang/crystal#17681 · Filter by author HertzDevil opened on Oct 21, 2026
  1

• Invalid memory access on pp ChunkIterator

  kind:bugtopic:stdlib:collection
  Bug

  crystal-lang/crystal#17653 · Filter by author I3oris opened on Oct 15, 2026
  7

• Using prelude in compiler specs considered harmful

  kind:specsstatus:discussiontopic:compiler
  crystal-lang/crystal#17642 · Filter by author straight-shoota opened on Oct 14, 2026
  1

• Module validation failed: Function return type does not match operand type of return inst! when two callers with different return types share a multi-raise private method

  kind:bugtopic:compiler:codegen
  crystal-lang/crystal#17639 · Filter by author threez opened on Oct 13, 2026
  1

• Compiler crashes with Missing hash key for value: 104 when an llvm.prefetch.* is called from two types

  kind:bugkind:regressiontopic:stdlib:llvm
  Bug

  crystal-lang/crystal#17636 · Filter by author sdogruyol opened on Oct 13, 2026
  1

• Generalize the follow_symlinks option

  kind:featuretopic:stdlib:system
  crystal-lang/crystal#17635 · Filter by author ysbaddaden opened on Oct 13, 2026
  1

• An annotation at the end of a block or method makes the program trap at run time

  kind:bugtopic:compiler:codegen
  Bug

  crystal-lang/crystal#17623 · Filter by author jochenseeber opened on Oct 12, 2026
  6

• crystal tool format leaves the file empty if it is killed mid-write

  kind:bugtopic:tools:formatter
  crystal-lang/crystal#17620 · Filter by author yottayoshida opened on Oct 12, 2026
  4

• FileUtils.rm_r fails on a directory containing a symlink loop

  crystal-lang/crystal#17610 · Filter by author jochenseeber opened on Oct 10, 2026

• Interpreter: GC collects objects referenced only from a spawned fiber's locals

  crystal-lang/crystal#17607 · Filter by author jochenseeber opened on Oct 9, 2026

• Semantic pass slows down quadratically with many instances of a generic class under an abstract type

  crystal-lang/crystal#17597 · Filter by author jochenseeber opened on Oct 8, 2026
  2