Fix lower bound of cc crate

[konstin]

Currently, the codspeed crate is declaring a dependency on cc 1.0, while using newer features. This is causing errors in minimal version checks in downstream crates.

This PR dumps the cc minimal version and adds a minimal-versions CI check to enforce correct lower bounds.

[greptile-apps]

Greptile Summary

This PR fixes an incorrect lower bound on the cc build dependency in crates/codspeed/Cargo.toml, tightening it from the overly-broad "1.0" to "1.2.40" which reflects the actual minimum required by the build.rs script (which calls APIs such as .cargo_warnings() and .try_compile() not available in older releases). A companion CI job using cargo +nightly update -Zminimal-versions is added to prevent lower-bound regressions going forward.

• crates/codspeed/Cargo.toml: cc build-dependency lower bound tightened from "1.0" → "1.2.40".
• .github/workflows/ci.yml: New minimal-versions job resolves all codspeed dependencies to their declared minimums and runs cargo check, wired into the existing check gate.
• Cargo.lock: Routine lock-file update — cc bumped to 1.2.63, find-msvc-tools to 0.1.9, shlex to 2.0.1.

Confidence Score: 5/5

Safe to merge — the change is a targeted dependency lower-bound fix with a CI guard that will catch any future regressions.

The only code change is a single version constraint bump in one Cargo.toml, paired with a CI job that directly validates the correctness of that bound using Cargo's own -Zminimal-versions resolver. The lock-file bump is a routine update with no logic changes.

No files require special attention.

Important Files Changed

Filename	Overview
crates/codspeed/Cargo.toml	Bumps the cc build-dependency lower bound from the overly-broad "1.0" to the precise minimum "1.2.40" that the build script actually requires.
.github/workflows/ci.yml	Adds a new minimal-versions CI job that uses nightly -Zminimal-versions to resolve dependencies to their declared lower bounds and then cargo-checks the codspeed crate, enforcing correct lower bounds going forward.
Cargo.lock	Updates cc (1.2.38→1.2.63), find-msvc-tools (0.1.2→0.1.9), and shlex (1.3.0→2.0.1) as a routine lock-file refresh.

Sequence Diagram

%%{init: {'theme': 'neutral'}}%%
sequenceDiagram
    participant GH as GitHub Actions
    participant Nightly as cargo (nightly)
    participant Stable as cargo (stable)
    participant CC as cc crate (>=1.2.40)

    GH->>Nightly: cargo +nightly update -Zminimal-versions -p codspeed --recursive
    Nightly-->>GH: "Cargo.lock resolved to minimum declared versions (cc = 1.2.40)"
    GH->>Stable: "cargo check -p codspeed --all-features --config codspeed=true"
    Stable->>CC: compile build.rs using cc 1.2.40
    CC-->>Stable: Build::cargo_warnings(), try_compile(), try_get_compiler() all available
    Stable-->>GH: check passes, lower bounds validated

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sequenceDiagram
    participant GH as GitHub Actions
    participant Nightly as cargo (nightly)
    participant Stable as cargo (stable)
    participant CC as cc crate (>=1.2.40)

    GH->>Nightly: cargo +nightly update -Zminimal-versions -p codspeed --recursive
    Nightly-->>GH: "Cargo.lock resolved to minimum declared versions (cc = 1.2.40)"
    GH->>Stable: "cargo check -p codspeed --all-features --config codspeed=true"
    Stable->>CC: compile build.rs using cc 1.2.40
    CC-->>Stable: Build::cargo_warnings(), try_compile(), try_get_compiler() all available
    Stable-->>GH: check passes, lower bounds validated

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_{Reviews (3): Last reviewed commit: "Fix lower bound of cc crate" | Re-trigger Greptile}

[codspeed-hq]

Merging this PR will improve performance by 7.42%

⚡ 18 improved benchmarks
❌ 6 (👁 2) regressed benchmarks
✅ 567 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	WallTime	hamiltonian_cycle[7]	1 µs	1.8 µs	-43.61%
❌	WallTime	large_drop	208.9 µs	242.9 µs	-13.99%
❌	WallTime	add_two_integers[(65535, -65535)]	75 ns	83 ns	-9.64%
❌	WallTime	init_array[42]	47 ns	51 ns	-7.84%
⚡	WallTime	bench_array1[42]	80 ns	48 ns	+66.67%
⚡	WallTime	hamiltonian_cycle[5]	1,475 ns	911 ns	+61.91%
⚡	WallTime	iter_batched_ref_large_input	6 ns	4 ns	+50%
⚡	WallTime	iter_batched_per_iteration	57 ns	46 ns	+23.91%
⚡	WallTime	bench_array2[42]	54 ns	48 ns	+12.5%
⚡	WallTime	graph_coloring[5]	1.2 µs	1 µs	+11.51%
⚡	WallTime	bench_array2[10]	10 ns	9 ns	+11.11%
⚡	WallTime	fib_in_thread[32]	17.9 ms	16.3 ms	+9.81%
⚡	WallTime	fib_in_thread_bench_local[32]	17.9 ms	16.3 ms	+9.79%
⚡	WallTime	fib_in_thread_bench[31]	11.2 ms	10.2 ms	+9.77%
⚡	WallTime	fib_in_thread_bench_local[31]	11.2 ms	10.2 ms	+9.73%
⚡	WallTime	fib_in_thread[31]	11.2 ms	10.2 ms	+9.72%
⚡	WallTime	fib_in_thread_bench[32]	17.9 ms	16.3 ms	+9.71%
⚡	WallTime	fib_in_thread_bench[30]	7.1 ms	6.5 ms	+9.42%
⚡	WallTime	fib_in_thread_bench_local[30]	7.1 ms	6.5 ms	+9.39%
⚡	WallTime	fib_in_thread[30]	7.1 ms	6.5 ms	+9.28%
...	...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing konstin:konsti/fix-cc-lower-bound (d662f12) with main (ec46807)}

[GuillaumeLagrange]

Thanks! Good catch