Rust CLI Troubleshooting: Dependencies, Features, and Lockfiles

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Commands for analyzing dependency trees, feature activation, duplicate crates, and lockfile behavior in Rust CLI projects.

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Dependency and feature inspection

Use Cargo tree and updates to understand why builds behave a certain way.

Print the dependency tree

Show the package dependency graph.

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bashANYcargotreedependencies

bash

cargo tree

A strong first step when trying to understand unexpected transitive dependencies.

Show reverse dependencies

Find what depends on a given crate.

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bashANYcargotreeinvertdependencies

bash

cargo tree -i serde

Useful when you need to know why a crate is present in the graph at all.

Find duplicate crate versions

List repeated dependencies that may bloat builds.

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bashANYcargotreeduplicates

bash

cargo tree -d

Duplicate versions are common when features or version requirements drift apart across the graph.

Inspect activated features

Show features involved in dependency resolution.

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bashANYcargotreefeatures

bash

cargo tree -e features

Helps explain why optional code paths are compiling or why a dependency appears heavier than expected.

Refresh the lockfile

Update dependencies allowed by version requirements.

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bashANYcargoupdatelockfile

bash

cargo update

Useful after fixing version constraints or when trying to reproduce a dependency-resolution change.

Pin one dependency precisely

Update a selected crate to one specific version.

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bashANYcargoupdateprecise

bash

cargo update -p clap --precise 4.5.0

Helpful when bisecting a regression or reproducing an issue tied to one dependency version.

Generate Cargo.lock

Create or refresh the lockfile explicitly.

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bashANYcargolockfile

bash

cargo generate-lockfile

Useful in CI or when the lockfile was deleted and you want a clean regeneration.

Feature troubleshooting snippets

Examples for toggling and inspecting feature combinations.

Build without default features

Check whether defaults are causing the issue.

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bashANYcargofeaturesno-default-features

bash

cargo build --no-default-features

Useful for debugging crates that compile only under a smaller feature set.

Build with selected features

Enable only the features you want to test.

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bashANYcargofeatures

bash

cargo build --features json,derive

Helpful for reproducing a problem that appears only under certain feature combinations.

Build with all features

Catch hidden compilation issues across optional code paths.

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bashANYcargofeaturesall-features

bash

cargo build --all-features

A common CI safeguard for libraries and CLI tools that expose optional functionality.

More in Rust CLI

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Rust CLI Troubleshooting: Tests, Doctests, and Documentation

Commands for debugging failing tests, capturing output, isolating flaky cases, and fixing documentation-generation issues in Rust CLI projects.

Rust CLI Troubleshooting: Manifest, Packages, and Workspaces

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Rust CLI Troubleshooting: Build Errors and Diagnostics

Commands for investigating compiler errors, Cargo diagnostics, verbose output, and fix suggestions in Rust CLI projects.

Rust CLI Cargo Config, Environment, Docs, and Debugging

Cargo configuration, environment variables, docs generation, and troubleshooting commands for Rust CLI development.

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