Switch to the new uplc_turbo to avoid memory leaks

[Eh2406]

Bring in the fixes from pragma-org/uplc#36

Summary by CodeRabbit

• Chores

  • Replaced the project's memory allocator dependency in the workspace manifest (removed prior allocator, added new allocator).

• Refactor

  • Switched the pooled memory arena to a different arena backend; updated public API surface and initialization paths to match the new backend.

[coderabbitai]

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Walkthrough

The PR removes the workspace bumpalo dependency from the root Cargo.toml, switches crates/amaru-plutus to use uplc-turbo.workspace = true, and refactors the arena pool to use uplc_turbo::arena::Arena (backed by bumpalo::Bump) instead of direct Bump usage.

Changes

Cohort / File(s)	Summary
Crate manifests Cargo.toml, crates/amaru-plutus/Cargo.toml	Removed bumpalo = { version = "3.16.0", features = ["collections"] } from workspace Cargo.toml; in crates/amaru-plutus/Cargo.toml replaced bumpalo.workspace = true with uplc-turbo.workspace = true.
Arena pool refactor crates/amaru-plutus/src/arena_pool.rs	Replaced pool element type Bump → Arena (pub type BumpPool = Mutex<VecDeque<Arena>>); ArenaPool::new now constructs Arena::from_bump(Bump::with_capacity(...)); PooledArena stores ManuallyDrop<Arena>; impl AsRef and Deref updated to Arena; imports adjusted to use uplc_turbo::{arena::Arena, bumpalo::Bump}.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Suggested reviewers

• KtorZ

Poem

A cheeky swap — bump tucked in an Arena cap,
Types shuffled like cards in a dungeon chap.
Imports aligned, the pool hums anew,
Merge it, mate — let those bytes debut. 🎮✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Switch to the new uplc_turbo to avoid memory leaks' directly and clearly describes the main change: migrating from bumpalo to uplc_turbo to fix memory leak issues.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch eh2406/mem-leak

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No actionable comments were generated in the recent review. 🎉

🧹 Recent nitpick comments

crates/amaru-plutus/src/arena_pool.rs (1)

21-23: Grand stuff on the import swap — wee naming nit on the type alias though.

BumpPool now holds Arenas rather than Bumps, so the name's a touch misleading — like calling your espresso a flat white, y'know? Consider renaming to ArenaPool (or something that reflects the actual contents). That said, there's already a struct called ArenaPool, so maybe ArenaVec or just Pool would do the trick. Totally optional, no drama if you leave it.

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@crates/amaru-plutus/src/arena_pool.rs`:
- Around line 21-23: The workspace still declares bumpalo and the file imports
bumpalo::Bump even though BumpPool (the type alias) only uses
uplc_turbo::arena::Arena; remove the unused Bump import from
crates/amaru-plutus/src/arena_pool.rs (keep uplc_turbo::arena::Arena and the
BumpPool alias) and drop the bumpalo entry from the root Cargo.toml workspace
dependencies if no member crate directly depends on bumpalo (verify no other
crates need it first, otherwise leave it).

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
crates/amaru-plutus/src/arena_pool.rs	50.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
crates/amaru-plutus/src/arena_pool.rs	25.00% <50.00%> (ø)

... and 4 files with indirect coverage changes

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[Eh2406]

I am not able to reproduce the CI failure locally. I don't know why it's not respecting the lock file.

With Fresh eyes on it I see there's another lockfile in the repo.

[Eh2406]

CI failures seem also to be occurring on other recent PR's (https://github.com/pragma-org/amaru/actions/runs/21783366269/job/62850815322) and appear to be unrelated to my code changes.