Issues

• roc test hangs on a recursive nominal type with a method that recurses through a method call

  Bug

  roc-lang/roc#12780 · Filter by author rtfeldman opened on Nov 1, 2026

• roc build --opt=speed compile time grows faster than linearly with the size of one function

  perf
  Bug

  roc-lang/roc#12779 · Filter by author rtfeldman opened on Nov 1, 2026

• roc build --opt=dev --target=wasm32 writes modules V8 cannot run for very large functions

  wasm
  Bug

  roc-lang/roc#12778 · Filter by author rtfeldman opened on Nov 1, 2026

• Link dev executables from one merged image of the cached unit objects, and without LLD for the default platform

  Task

  roc-lang/roc#12777 · Filter by author rtfeldman opened on Nov 1, 2026

• roc test --specialize=no panics when a literal reaches a function through an exact procedure alias

  boxy
  Bug

  roc-lang/roc#12776 · Filter by author rtfeldman opened on Nov 1, 2026

• List.sort_with on records with a refcounted field panics in the ARC certifier at --opt=speed and --opt=size

  Bug

  roc-lang/roc#12775 · Filter by author rtfeldman opened on Nov 1, 2026
  

• roc build segfaults in post-check spec_constr on aarch64 Linux (nightly-2026-10-31 and later): ? in a lambda over a record-held function with a single-tag error

  roc-lang/roc#12771 · Filter by author Karakatiza666 opened on Nov 1, 2026

• Seemingly contradictory documentation regarding out of memory errors

  roc-lang/roc#12770 · Filter by author InvisOn opened on Nov 1, 2026

• roc build --opt=dev --target=wasm32 overflows a u8 in internFuncType past 255 wasm parameters, hidden --specialize=no parameters count, ReleaseFast does not notice

  Bug

  roc-lang/roc#12769 · Filter by author niclas-ahden opened on Nov 1, 2026
  

• Investigate removing cloneSharedConsumer by giving loops consumer joins

  Task

  roc-lang/roc#12766 · Filter by author rtfeldman opened on Nov 1, 2026

• roc build hangs on a self-recursive match over a recursive tag union with 6 or more variants, since nightly-2026-10-29

  Bug

  roc-lang/roc#12763 · Filter by author lukewilliamboswell opened on Nov 1, 2026

• Monotype panic "active Monotype TypeId requested for an unresolved instantiation graph node" on a ? call of a function returning a wrapped open error row

  Bug

  roc-lang/roc#12762 · Filter by author Karakatiza666 opened on Nov 1, 2026

• Machine-readable output for roc check (positions of each problem)

  Feature

  roc-lang/roc#12761 · Filter by author y2kbugger opened on Nov 1, 2026
  4

• roc glue declares a by-value argument of an app-chosen type as a pointer; the entrypoint takes it by value

  Bug

  roc-lang/roc#12760 · Filter by author y2kbugger opened on Nov 1, 2026

• roc check crash

  Bug

  roc-lang/roc#12759 · Filter by author notramo opened on Nov 1, 2026

• Cache completed checking and compile-time results together with diagnostics, including errors

  Bug

  roc-lang/roc#12757 · Filter by author rtfeldman opened on Oct 31, 2026

• roc test does not show values of used variables

  Bug

  roc-lang/roc#12756 · Filter by author j-maas opened on Oct 31, 2026

• Monotype panic: "instantiation record row extended into a non-record type" for a function generic over a nominal record's row variable

  Bug

  roc-lang/roc#12755 · Filter by author Karakatiza666 opened on Oct 31, 2026

• Boxy panic: mismatched child roles when a record type has a row variable as an alias argument

  Bug

  roc-lang/roc#12754 · Filter by author Karakatiza666 opened on Oct 31, 2026

• Boxy panic: unresolved bare dynamic representation for a record that is only a row variable ({ ..r })

  Bug

  roc-lang/roc#12753 · Filter by author Karakatiza666 opened on Oct 31, 2026

• roc test: Monotype ICE "rejected dispatch reached result type lookup" on dbg of a rejected method call

  Bug

  roc-lang/roc#12752 · Filter by author Karakatiza666 opened on Oct 31, 2026

• Debug ARC certifier: "ownership unit ... not carried into join" at --opt=speed when a field dies on one branch

  Bug

  roc-lang/roc#12751 · Filter by author Karakatiza666 opened on Oct 31, 2026

• roc fmt removes trailing whitespace from multiline strings

  Bug

  roc-lang/roc#12749 · Filter by author j-maas opened on Oct 31, 2026

• A method bound to a function from another module is ignored by Str.inspect and ==, and panics when called

  Bug

  roc-lang/roc#12739 · Filter by author Karakatiza666 opened on Oct 31, 2026

• Direct package A dependency prevents caching package B's pinned A version

  Bug

  roc-lang/roc#12738 · Filter by author ageron opened on Oct 31, 2026