❯ RUST_BACKTRACE=1 ./target/debug/roc repl

  The rockin' roc repl
────────────────────────

Enter an expression, or :help, or :q to quit.

» 1 + 2
thread 'main' panicked at core/src/panicking.rs:221:5:
unsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`
stack backtrace:
   0: rust_begin_unwind
             at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/std/src/panicking.rs:665:5
   1: core::panicking::panic_nounwind_fmt::runtime
             at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panicking.rs:112:18
   2: core::panicking::panic_nounwind_fmt
             at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panicking.rs:122:5
   3: core::panicking::panic_nounwind
             at /rustc/90b35a6239c3d8bdabc530a6a0816f7ff89a0aaf/library/core/src/panicking.rs:221:5
   4: precondition_check
             at /Users/anthonybullard/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ub_checks.rs:70:21
   5: from_raw_parts<u64>
             at /Users/anthonybullard/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ub_checks.rs:77:17
   6: deserialize_slice<u64>
             at ./crates/compiler/serialize/src/bytes.rs:35:26
   7: deserialize_solved_implementations
             at ./crates/compiler/can/src/abilities.rs:1197:35
   8: deserialize
             at ./crates/compiler/can/src/module.rs:1252:13
   9: deserialize_help
             at ./crates/compiler/load/src/lib.rs:240:28
  10: read_cached_types
             at ./crates/compiler/load/src/lib.rs:266:39
  11: load
             at ./crates/compiler/load/src/lib.rs:37:24
  12: load_and_monomorphize_from_str
             at ./crates/compiler/load/src/lib.rs:117:11
  13: compile_to_mono<core::iter::adapters::map::Map<core::slice::iter::Iter<roc_repl_ui::repl_state::PastDef>, roc_repl_ui::repl_state::{impl#1}::step::{closure_env#0}>>
             at ./crates/repl_eval/src/gen.rs:64:18
  14: step
             at ./crates/repl_ui/src/repl_state.rs:260:36
  15: main
             at ./crates/repl_cli/src/lib.rs:88:23
  16: main
             at ./crates/cli/src/main.rs:305:16
  17: call_once<fn() -> core::result::Result<(), std::io::error::Error>, ()>
             at /Users/anthonybullard/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
thread caused non-unwinding panic. aborting.
zsh: abort      RUST_BACKTRACE=1 ./target/debug/roc repl

 …/roc   issue-7415-parens-and-commas $!⇡   v1.77.2   18:33
❯ rustup which cargo
~/.rustup/toolchains/1.77.2-aarch64-apple-darwin/bin/cargo

 …/roc   issue-7415-parens-and-commas $!⇡   v1.77.2   18:35
❯ rustup which rustc
~/.rustup/toolchains/1.77.2-aarch64-apple-darwin/bin/rustc

 …/roc   issue-7415-parens-and-commas $!⇡   v1.77.2   18:35
❯ RUST_BACKTRACE=1 ./target/debug/roc --version
roc built from commit 5975922a09 with additional changes, committed at 2024-12-28 16:39:39 UTC

$ git switch 5975922a09
fatal: invalid reference: 5975922a09