{"id":"4400322375732fed","repo":"rust-lang/cargo","slug":"library-target-names-cannot-contain-hyphens","errorCode":null,"errorMessage":"library target names cannot contain hyphens: {}","messagePattern":"library target names cannot contain hyphens: (.+?)","errorType":"validation","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"src/workspace/parser/targets.rs","lineNumber":1152,"sourceCode":"fn validate_build_name(build: &str) -> CargoResult<()> {\n    if Path::new(build).file_stem().is_none() {\n        anyhow::bail!(\"invalid `package.build` file name\");\n    }\n    Ok(())\n}\n\nfn name_or_panic(target: &TomlTarget) -> &str {\n    target\n        .name\n        .as_deref()\n        .unwrap_or_else(|| panic!(\"target name is required\"))\n}\n\nfn validate_lib_name(target: &TomlTarget, warnings: &mut Vec<String>) -> CargoResult<()> {\n    validate_target_name(target, TARGET_KIND_HUMAN_LIB, TARGET_KIND_LIB, warnings)?;\n    let name = name_or_panic(target);\n    if name.contains('-') {\n        anyhow::bail!(\"library target names cannot contain hyphens: {}\", name)\n    }\n\n    Ok(())\n}\n\nfn validate_bin_name(bin: &TomlTarget, warnings: &mut Vec<String>) -> CargoResult<()> {\n    validate_target_name(bin, TARGET_KIND_HUMAN_BIN, TARGET_KIND_BIN, warnings)?;\n    let name = name_or_panic(bin).to_owned();\n    if restricted_names::is_conflicting_artifact_name(&name) {\n        anyhow::bail!(\n            \"the binary target name `{name}` is forbidden, \\\n                 it conflicts with cargo's build directory names\",\n        )\n    }\n\n    Ok(())\n}\n","sourceCodeStart":1134,"sourceCodeEnd":1170,"githubUrl":"https://github.com/rust-lang/cargo/blob/0e07a155371a6ce88ae53a2c00df940280c09a67/src/workspace/parser/targets.rs#L1134-L1170","documentation":"Error \"library target names cannot contain hyphens: {}\" thrown in rust-lang/cargo.","triggerScenarios":"Thrown at src/workspace/parser/targets.rs:1152 when the library encounters an invalid state.","commonSituations":"Occurs when a `[lib]` target name contains hyphens. Replace hyphens with underscores, since library crate names must be valid Rust identifiers.","solutions":["Replace hyphens with underscores in the library target name.","Set `[lib] name` explicitly to a name without hyphens."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"analyzedSha":"0e07a155371a6ce88ae53a2c00df940280c09a67","analyzedAt":"2026-08-06T01:46:58.334Z","schemaVersion":2}