[INFO] cloning repository https://github.com/AbsoluteVirtueXI/semantic_version
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AbsoluteVirtueXI/semantic_version" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbsoluteVirtueXI%2Fsemantic_version", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbsoluteVirtueXI%2Fsemantic_version'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1aeb1ba388ee84dd4dbbcee22d2e9cc519024f2d
[INFO] checking AbsoluteVirtueXI/semantic_version against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbsoluteVirtueXI%2Fsemantic_version" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AbsoluteVirtueXI/semantic_version
[INFO] finished tweaking git repo https://github.com/AbsoluteVirtueXI/semantic_version
[INFO] tweaked toml for git repo https://github.com/AbsoluteVirtueXI/semantic_version written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AbsoluteVirtueXI/semantic_version on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AbsoluteVirtueXI/semantic_version already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 144576e7f7c9c1efe461fc0073b38cad5f923a24faab03813229b2d7494463a5
[INFO] running `Command { std: "docker" "start" "-a" "144576e7f7c9c1efe461fc0073b38cad5f923a24faab03813229b2d7494463a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "144576e7f7c9c1efe461fc0073b38cad5f923a24faab03813229b2d7494463a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "144576e7f7c9c1efe461fc0073b38cad5f923a24faab03813229b2d7494463a5", kill_on_drop: false }`
[INFO] [stdout] 144576e7f7c9c1efe461fc0073b38cad5f923a24faab03813229b2d7494463a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d34c5bb115baef5e4ef6f3f194e26e0399f8ad6409ecd63bc5d411a11a0ffa10
[INFO] running `Command { std: "docker" "start" "-a" "d34c5bb115baef5e4ef6f3f194e26e0399f8ad6409ecd63bc5d411a11a0ffa10", kill_on_drop: false }`
[INFO] [stderr]     Checking semver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `build` should have an upper camel case name
[INFO] [stdout]  --> src/token.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     build(Option<String>),
[INFO] [stdout]   |     ^^^^^ help: convert the identifier to upper camel case: `Build`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `build` should have an upper camel case name
[INFO] [stdout]  --> src/token.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     build(Option<String>),
[INFO] [stdout]   |     ^^^^^ help: convert the identifier to upper camel case: `Build`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> src/parser.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Parser {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scanner` is never constructed
[INFO] [stdout]  --> src/scanner.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Scanner {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `scan_tokens`, and `scan_token` are never used
[INFO] [stdout]   --> src/scanner.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Scanner {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 13 |     pub fn new(source: &str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn scan_tokens(&mut self) -> Result<Vec<Token>, String> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn scan_token(&mut self) -> Result<(), String> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `min` and `max` are never read
[INFO] [stdout]    --> src/semver.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 142 | pub struct RangeSemVer {
[INFO] [stdout]     |            ----------- fields in this struct
[INFO] [stdout] 143 |     min: SemVer,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 144 |     max: SemVer,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/token.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 3  | enum TokenKind {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 4  |     Major(u64),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 5  |     Minor(u64),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 6  |     Patch(u64),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 7  |     PreRelease(Option<String>),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 8  |     build(Option<String>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 9  |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     Hyphen,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 11 |     Plus,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 12 |     NumericIdentifier,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 13 |     AlphaNumericIdentifier,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind`, `position`, and `lexeme` are never read
[INFO] [stdout]   --> src/token.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Token {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 17 |     kind: TokenKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     position: usize,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 19 |     lexeme: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/scanner.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         self.scan_token();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let _ = self.scan_token();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> src/parser.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Parser {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scanner` is never constructed
[INFO] [stdout]  --> src/scanner.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Scanner {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `scan_tokens`, and `scan_token` are never used
[INFO] [stdout]   --> src/scanner.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Scanner {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 13 |     pub fn new(source: &str) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn scan_tokens(&mut self) -> Result<Vec<Token>, String> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn scan_token(&mut self) -> Result<(), String> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `min` and `max` are never read
[INFO] [stdout]    --> src/semver.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 142 | pub struct RangeSemVer {
[INFO] [stdout]     |            ----------- fields in this struct
[INFO] [stdout] 143 |     min: SemVer,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 144 |     max: SemVer,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/token.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 3  | enum TokenKind {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 4  |     Major(u64),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 5  |     Minor(u64),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 6  |     Patch(u64),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 7  |     PreRelease(Option<String>),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 8  |     build(Option<String>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 9  |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     Hyphen,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 11 |     Plus,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 12 |     NumericIdentifier,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 13 |     AlphaNumericIdentifier,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenKind` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind`, `position`, and `lexeme` are never read
[INFO] [stdout]   --> src/token.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Token {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 17 |     kind: TokenKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     position: usize,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 19 |     lexeme: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/scanner.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         self.scan_token();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let _ = self.scan_token();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "d34c5bb115baef5e4ef6f3f194e26e0399f8ad6409ecd63bc5d411a11a0ffa10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d34c5bb115baef5e4ef6f3f194e26e0399f8ad6409ecd63bc5d411a11a0ffa10", kill_on_drop: false }`
[INFO] [stdout] d34c5bb115baef5e4ef6f3f194e26e0399f8ad6409ecd63bc5d411a11a0ffa10
