[INFO] cloning repository https://github.com/chenbobby/rustlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chenbobby/rustlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchenbobby%2Frustlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchenbobby%2Frustlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 03cffe794654cc6706ff6add5ec65f9bf48bdeb1
[INFO] checking chenbobby/rustlox/03cffe794654cc6706ff6add5ec65f9bf48bdeb1 against master#c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2 for pr-142712
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchenbobby%2Frustlox" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/chenbobby/rustlox
[INFO] finished tweaking git repo https://github.com/chenbobby/rustlox
[INFO] tweaked toml for git repo https://github.com/chenbobby/rustlox written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/chenbobby/rustlox on toolchain c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chenbobby/rustlox 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" "+c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de0a675ea7e60e069df9e57670db1375a1c2ca80620be847a3c7d220b6f0cd61
[INFO] running `Command { std: "docker" "start" "-a" "de0a675ea7e60e069df9e57670db1375a1c2ca80620be847a3c7d220b6f0cd61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de0a675ea7e60e069df9e57670db1375a1c2ca80620be847a3c7d220b6f0cd61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de0a675ea7e60e069df9e57670db1375a1c2ca80620be847a3c7d220b6f0cd61", kill_on_drop: false }`
[INFO] [stdout] de0a675ea7e60e069df9e57670db1375a1c2ca80620be847a3c7d220b6f0cd61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+c720f49c46ec3e70bbc2bbb3e0dd1fe7fc0a47f2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1893e0a406c5ddc13a9ea303371ec90f66288e8dc56741a350ed7e2810f9099e
[INFO] running `Command { std: "docker" "start" "-a" "1893e0a406c5ddc13a9ea303371ec90f66288e8dc56741a350ed7e2810f9099e", kill_on_drop: false }`
[INFO] [stderr]     Checking rustlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `line_number` and `message` are never read
[INFO] [stdout]   --> src/parser/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Error {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 12 |     pub line_number: i32,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 13 |     pub message: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/token.rs:78:48
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn new(token_type: TokenType, lexeme: &'a str, line_number: i32) -> Token {
[INFO] [stdout]    |                                                ^^                           ----- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                                                |
[INFO] [stdout]    |                                                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn new(token_type: TokenType, lexeme: &'a str, line_number: i32) -> Token<'a> {
[INFO] [stdout]    |                                                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `line_number` and `message` are never read
[INFO] [stdout]   --> src/parser/mod.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Error {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 12 |     pub line_number: i32,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 13 |     pub message: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/token.rs:78:48
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn new(token_type: TokenType, lexeme: &'a str, line_number: i32) -> Token {
[INFO] [stdout]    |                                                ^^                           ----- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                                                |
[INFO] [stdout]    |                                                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn new(token_type: TokenType, lexeme: &'a str, line_number: i32) -> Token<'a> {
[INFO] [stdout]    |                                                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "1893e0a406c5ddc13a9ea303371ec90f66288e8dc56741a350ed7e2810f9099e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1893e0a406c5ddc13a9ea303371ec90f66288e8dc56741a350ed7e2810f9099e", kill_on_drop: false }`
[INFO] [stdout] 1893e0a406c5ddc13a9ea303371ec90f66288e8dc56741a350ed7e2810f9099e