Issues

• An annotated effectful function of no arguments that calls itself is run at compile time ("hosted function … is not available while evaluating at compile time")

  roc-lang/roc#12954 · Filter by author y2kbugger opened on Nov 11, 2026

• Host boundary rejects an opaque Box of a state that contains functions (since #12887); the same state is accepted as Box(Iter(State))

  roc-lang/roc#12953 · Filter by author lukewilliamboswell opened on Nov 10, 2026

• Method call with ? in a lambda passed to a generic function is checked against a closed error union

  Bug

  roc-lang/roc#12951 · Filter by author lukewilliamboswell opened on Nov 10, 2026

• roc test (dev backend) segfaults on a type error that roc check reports: Json.to_str of a value holding a float

  Bug

  roc-lang/roc#12948 · Filter by author lukewilliamboswell opened on Nov 10, 2026

• --specialize=no build segfaults in boxy_lowering when it reuses cache entries from a specialized build

  Bug

  roc-lang/roc#12946 · Filter by author lukewilliamboswell opened on Nov 10, 2026

• --specialize=no: iterating a derived parser's FieldNames leaks memory on every record decode

  Bug

  roc-lang/roc#12945 · Filter by author lukewilliamboswell opened on Nov 10, 2026

• Debug info names Roc procedures by hash instead of source name

  Bug

  roc-lang/roc#12943 · Filter by author rtfeldman opened on Nov 9, 2026

• An unused Str statement is reported as an interpolation mismatch elsewhere

  roc-lang/roc#12942 · Filter by author thebrandonlucas opened on Nov 9, 2026

• Boxy lowering invariant fires for an unannotated format whose state stays open

  Bug

  roc-lang/roc#12939 · Filter by author rtfeldman opened on Nov 9, 2026

• Monotype: restored closure of a generalized local function replays dispatch relations at the wrong evidence frame ("instantiation unified a primitive type with a non-primitive type")

  roc-lang/roc#12936 · Filter by author Karakatiza666 opened on Nov 9, 2026

• Compile-time list values lose reserved capacity during runtime mutation

  Bug

  roc-lang/roc#12931 · Filter by author rtfeldman opened on Nov 9, 2026

• Nov 7: check cache makes a Locks.decode fuzz build SIGSEGV; cold build succeeds

  Bug

  roc-lang/roc#12930 · Filter by author lukewilliamboswell opened on Nov 8, 2026
  

• Layout commit gives a recursion box and an explicit Box of the same type two layouts (duplicate refcount helper panic)

  Bug

  roc-lang/roc#12927 · Filter by author Karakatiza666 opened on Nov 8, 2026
  

• wasm32 dev backend: a closure call gives each lambda-set member its own stack slots, so the frame grows with the member count

  Bug

  roc-lang/roc#12922 · Filter by author Karakatiza666 opened on Nov 8, 2026
  

• Compiler segfault (post-check monotype) when a format has encode_key_start and a Dict has a tuple key

  Bug

  roc-lang/roc#12919 · Filter by author Karakatiza666 opened on Nov 8, 2026

• Dict seed is fixed in a roc build binary, so crafted Str keys make Dict insert quadratic

  Bug

  roc-lang/roc#12918 · Filter by author Karakatiza666 opened on Nov 8, 2026
  1

  

• Dropping a deeply nested recursive value overflows the stack

  Bug

  roc-lang/roc#12917 · Filter by author Karakatiza666 opened on Nov 8, 2026

• Investigate zero-initialized storage across checker and compiler tables

  Task

  roc-lang/roc#12914 · Filter by author rtfeldman opened on Nov 8, 2026
  

• Segfault with nested recursive closures that capture variables

  Bug

  roc-lang/roc#12913 · Filter by author InvisOn opened on Nov 8, 2026

• Padded nominal record with a named row extension crashes generic Boxy lowering

  boxyP-high
  Bug

  roc-lang/roc#12912 · Filter by author rtfeldman opened on Nov 7, 2026
  1

  

• Make per-module Boxy relowering faster after an edit

  Task

  roc-lang/roc#12910 · Filter by author rtfeldman opened on Nov 7, 2026
  

• List.sort_with: each element type adds a full copy of the sort (20 to 90 KB of code each)

  Task

  roc-lang/roc#12905 · Filter by author Karakatiza666 opened on Nov 7, 2026
  1

  

• A match arm with an or-pattern is emitted once per alternative (function N times larger)

  Bug

  roc-lang/roc#12903 · Filter by author Karakatiza666 opened on Nov 7, 2026
  

• Debug build panics in Monotype on roc-pdf's quarterly_report: hoisted constant's type view has unresolved non-field evidence

  Bug

  roc-lang/roc#12902 · Filter by author rtfeldman opened on Nov 7, 2026

• specialize=yes panics in lambda_solve when a function with a body-local nominal type is used at two types

  Bug

  roc-lang/roc#12899 · Filter by author rtfeldman opened on Nov 6, 2026