Issues

• 1.13 regression: a task in sleep does not wake while every thread runs a yield()ing busy loop (bracketed to #62665; 1.12 and master OK)

  JuliaLang/julia#63882 · Filter by author PingoLee opened on Oct 16, 2026

• RISC-V: ABI test error in ccall

  ffisystem:riscv
  JuliaLang/julia#63880 · Filter by author giordano opened on Oct 16, 2026
  1

• LateLowerGCFrame assertion on a vector addrspacecast of type pointers (mapreduce(typeof, promote_type, ::Vector{Union{Float32,Float64}}))

  JuliaLang/julia#63874 · Filter by author maleadt opened on Oct 16, 2026

• Compile-time blowup on 1.13: @inline broadcast(f, As...) inlines every broadcast in large generated functions

  JuliaLang/julia#63872 · Filter by author xtalax opened on Oct 16, 2026

• { } vector syntax is discontinued

  JuliaLang/julia#63863 · Filter by author GunnarFarneback opened on Oct 16, 2026

• typeintersect returns SubArray{…, Union{}, …} instead of Union{} when the index-tuple parameter is free, causing false invalidations

  JuliaLang/julia#63858 · Filter by author ViralBShah opened on Oct 16, 2026
  3

• Windows: packages that ccall :libmpfr by bare name fail since #63686

  JuliaLang/julia#63849 · Filter by author maleadt opened on Oct 15, 2026
  6

• Dispatch runs a MethodInstance with unbound static parameters after inferring a caller

  JuliaLang/julia#63844 · Filter by author maleadt opened on Oct 15, 2026

• Lazily created scheduler task advances the RNG of whichever task first blocks

  JuliaLang/julia#63841 · Filter by author maleadt opened on Oct 15, 2026
  1

• put!(::Channel) wakes up all waiters, but probably shouldn't

  multithreadingperformance
  JuliaLang/julia#63840 · Filter by author jakobnissen opened on Oct 15, 2026

• Backport #60924 to 1.12 and 1.13: GC segfault from a partially initialized Union box (#62524)

  JuliaLang/julia#63831 · Filter by author hsgg opened on Oct 14, 2026

• Self-referential struct field with <: bound fails on nightly: TypeVar upper bound is Core.TypeApp

  regression 1.14types and dispatch
  JuliaLang/julia#63827 · Filter by author KristofferC opened on Oct 14, 2026 · 1.14
  1

• valgrind 3.25 aborts at startup (Assertion '!overlap' failed) on 1.14-DEV

  upstream
  JuliaLang/julia#63820 · Filter by author KristofferC opened on Oct 14, 2026

• Automatic bracket insertion with autocomplete results in syntax error

  REPL
  JuliaLang/julia#63817 · Filter by author cserteGT3 opened on Oct 14, 2026
  1

  

• Field of a by-reference immutable argument used as stop of 1:n loses !tbaa/!invariant.load (PhiNode null-check guard + SimplifyCFG speculation)

  JuliaLang/julia#63802 · Filter by author vchuravy opened on Oct 13, 2026
  1

  

• objcache: SysV semaphore sets leak on macOS, one per depot

  JuliaLang/julia#63789 · Filter by author maleadt opened on Oct 13, 2026 · 1.14
  

• read!/readbytes! on IOStream ~10 ns slower per call than on 1.13 (cancellation checks?)

  ioperformanceregression 1.14
  JuliaLang/julia#63788 · Filter by author KristofferC opened on Oct 13, 2026 · 1.14

• Raw pointer stores in a loop force reloads of Array size and data pointer (regression since #62904)

  arraysperformance
  JuliaLang/julia#63782 · Filter by author vchuravy opened on Oct 13, 2026

• Cannot start repl on FreeBSD

  JuliaLang/julia#63777 · Filter by author kostikbel opened on Oct 13, 2026 · 1.14
  2

• Another flaky REPL test

  flaky
  JuliaLang/julia#63772 · Filter by author xal-0 opened on Oct 12, 2026
  4

• suboptimal implementation in iterators.jl around _zip_lengths_finite_equal

  iteration
  JuliaLang/julia#63756 · Filter by author nsajko opened on Oct 12, 2026

• printstyled(::Method) does not reset the text color after the function name

  JuliaLang/julia#63753 · Filter by author kimikage opened on Oct 12, 2026

• .ji caches (--pkgimages=no/existing) no longer save precompiled code for external methods (regression from #61997)

  JuliaLang/julia#63752 · Filter by author KristofferC opened on Oct 12, 2026 · 1.14
  1

• Package images drop inferred CodeInstances that don't get native code (regression, likely #62303)

  JuliaLang/julia#63751 · Filter by author KristofferC opened on Oct 12, 2026 · 1.14
  1

• Returning an anonymous function that uses a local multi-method function results in boxing

  JuliaLang/julia#63706 · Filter by author mikmoore opened on Oct 9, 2026
  1