Importing Custom Ability Panics Compile

[benplotke]

Steps to Reproduce

1. Create SortAbility.roc with contents:

module [
    Comparison,
    Sort,
]

Comparison : [LessThan, Equal, GreaterThan]
Sort implements
    compare : a, a -> Comparison where a implements Sort

2. In the same directory, create ImportAbility.roc with contents:

module [
]

import SortAbility

3. run roc test AbilityImport.roc

Expected Results

Nothing

Actual

 ~/docs/code/roc/OrderedCollections $ ~/roc/roc_ben-build-2024-05-02-798dd77/roc test AbilityImport.roc
An internal compiler expectation was broken.
This is definitely a compiler bug.
Please file an issue here: https://github.com/roc-lang/roc/issues/new/choose
thread '<unnamed>' panicked at crates/compiler/load_internal/src/file.rs:4535:29:
Import ability member `SortAbility.compare` not available
stack backtrace:
   0: rust_begin_unwind
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/std/src/panicking.rs:595:5
   1: core::panicking::panic_fmt
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/core/src/panicking.rs:67:14
   2: import_variable_for_symbol
             at /home/ben/roc/roc-src/crates/compiler/load_internal/src/file.rs:4535:29
   3: roc_load_internal::file::add_imports::{{closure}}
             at /home/ben/roc/roc-src/crates/compiler/load_internal/src/file.rs:4429:17
   4: roc_can::abilities::IAbilitiesStore<roc_can::abilities::Pending>::resolve_for_module::{{closure}}
             at /home/ben/roc/roc-src/crates/compiler/can/src/abilities.rs:621:44
   5: core::iter::adapters::map::map_fold::{{closure}}
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/core/src/iter/adapters/map.rs:84:28
   6: core::iter::traits::iterator::Iterator::fold
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/core/src/iter/traits/iterator.rs:2639:21
   7: fold<(roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Resolved>), std::collections::hash::map::IntoIter<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Pending>>, roc_can::abilities::{impl#7}::resolve_for_module::{closure_env#0}<roc_load_internal::file::add_imports::Ctx, roc_load_internal::file::add_imports::{closure_env#0}, roc_load_internal::file::add_imports::{closure_env#1}>, (), core::iter::traits::iterator::Iterator::for_each::call::{closure_env#0}<(roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Resolved>), hashbrown::map::{impl#95}::extend::{closure_env#0}<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Resolved>, core::hash::BuildHasherDefault<wyhash::traits::WyHash>, alloc::alloc::Global, core::iter::adapters::map::Map<std::collections::hash::map::IntoIter<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Pending>>, roc_can::abilities::{impl#7}::resolve_for_module::{closure_env#0}<roc_load_internal::file::add_imports::Ctx, roc_load_internal::file::add_imports::{closure_env#0}, roc_load_internal::file::add_imports::{closure_env#1}>>>>>
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/core/src/iter/adapters/map.rs:124:9
   8: for_each<core::iter::adapters::map::Map<std::collections::hash::map::IntoIter<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Pending>>, roc_can::abilities::{impl#7}::resolve_for_module::{closure_env#0}<roc_load_internal::file::add_imports::Ctx, roc_load_internal::file::add_imports::{closure_env#0}, roc_load_internal::file::add_imports::{closure_env#1}>>, hashbrown::map::{impl#95}::extend::{closure_env#0}<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Resolved>, core::hash::BuildHasherDefault<wyhash::traits::WyHash>, alloc::alloc::Global, core::iter::adapters::map::Map<std::collections::hash::map::IntoIter<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Pending>>, roc_can::abilities::{impl#7}::resolve_for_module::{closure_env#0}<roc_load_internal::file::add_imports::Ctx, roc_load_internal::file::add_imports::{closure_env#0}, roc_load_internal::file::add_imports::{closure_env#1}>>>>
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/core/src/iter/traits/iterator.rs:857:9
   9: extend<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Resolved>, core::hash::BuildHasherDefault<wyhash::traits::WyHash>, alloc::alloc::Global, core::iter::adapters::map::Map<std::collections::hash::map::IntoIter<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Pending>>, roc_can::abilities::{impl#7}::resolve_for_module::{closure_env#0}<roc_load_internal::file::add_imports::Ctx, roc_load_internal::file::add_imports::{closure_env#0}, roc_load_internal::file::add_imports::{closure_env#1}>>>
             at /cargo/registry/src/index.crates.io-6f17d22bba15001f/hashbrown-0.14.0/src/map.rs:6455:9
  10: extend<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Resolved>, core::hash::BuildHasherDefault<wyhash::traits::WyHash>, core::iter::adapters::map::Map<std::collections::hash::map::IntoIter<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Pending>>, roc_can::abilities::{impl#7}::resolve_for_module::{closure_env#0}<roc_load_internal::file::add_imports::Ctx, roc_load_internal::file::add_imports::{closure_env#0}, roc_load_internal::file::add_imports::{closure_env#1}>>>
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/std/src/collections/hash/map.rs:3038:9
  11: from_iter<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Resolved>, core::hash::BuildHasherDefault<wyhash::traits::WyHash>, core::iter::adapters::map::Map<std::collections::hash::map::IntoIter<roc_module::symbol::Symbol, roc_can::abilities::AbilityMemberData<roc_can::abilities::Pending>>, roc_can::abilities::{impl#7}::resolve_for_module::{closure_env#0}<roc_load_internal::file::add_imports::Ctx, roc_load_internal::file::add_imports::{closure_env#0}, roc_load_internal::file::add_imports::{closure_env#1}>>>
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/std/src/collections/hash/map.rs:3023:13
  12: core::iter::traits::iterator::Iterator::collect
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/core/src/iter/traits/iterator.rs:2053:9
  13: roc_can::abilities::IAbilitiesStore<roc_can::abilities::Pending>::resolve_for_module
             at /home/ben/roc/roc-src/crates/compiler/can/src/abilities.rs:605:31
  14: add_imports
             at /home/ben/roc/roc-src/crates/compiler/load_internal/src/file.rs:4417:27
  15: run_solve_solve
             at /home/ben/roc/roc-src/crates/compiler/load_internal/src/file.rs:4604:47
  16: roc_load_internal::file::run_solve
             at /home/ben/roc/roc-src/crates/compiler/load_internal/src/file.rs:4765:13
  17: roc_load_internal::file::run_task
             at /home/ben/roc/roc-src/crates/compiler/load_internal/src/file.rs:6144:17
  18: worker_task
             at /home/ben/roc/roc-src/crates/compiler/load_internal/src/file.rs:2091:34
  19: roc_load_internal::file::load_multi_threaded::{{closure}}::{{closure}}
             at /home/ben/roc/roc-src/crates/compiler/load_internal/src/file.rs:1831:25
  20: crossbeam_utils::thread::ScopedThreadBuilder::spawn::{{closure}}
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-utils-0.8.16/src/thread.rs:440:31
  21: core::ops::function::FnOnce::call_once{{vtable.shim}}
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/core/src/ops/function.rs:250:5
  22: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/alloc/src/boxed.rs:2007:9
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.