[INFO] cloning repository https://github.com/sebdeveloper6952/rust-lexical-analyzer-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sebdeveloper6952/rust-lexical-analyzer-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsebdeveloper6952%2Frust-lexical-analyzer-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsebdeveloper6952%2Frust-lexical-analyzer-generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 402970cc277a93f809a02b54fee449fb4e82b00c
[INFO] checking sebdeveloper6952/rust-lexical-analyzer-generator against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsebdeveloper6952%2Frust-lexical-analyzer-generator" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sebdeveloper6952/rust-lexical-analyzer-generator
[INFO] finished tweaking git repo https://github.com/sebdeveloper6952/rust-lexical-analyzer-generator
[INFO] tweaked toml for git repo https://github.com/sebdeveloper6952/rust-lexical-analyzer-generator written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sebdeveloper6952/rust-lexical-analyzer-generator on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sebdeveloper6952/rust-lexical-analyzer-generator 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.125
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be50fdeffda38a94a10adcbd7c81042bfb927fe35df3b9afaf816940852dbbea
[INFO] running `Command { std: "docker" "start" "-a" "be50fdeffda38a94a10adcbd7c81042bfb927fe35df3b9afaf816940852dbbea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be50fdeffda38a94a10adcbd7c81042bfb927fe35df3b9afaf816940852dbbea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be50fdeffda38a94a10adcbd7c81042bfb927fe35df3b9afaf816940852dbbea", kill_on_drop: false }`
[INFO] [stdout] be50fdeffda38a94a10adcbd7c81042bfb927fe35df3b9afaf816940852dbbea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ad0aaf5a836fe9c8f665f72c19895ea5ef26b2e0c7cef627f88c8b3c9b2ecd4
[INFO] running `Command { std: "docker" "start" "-a" "1ad0aaf5a836fe9c8f665f72c19895ea5ef26b2e0c7cef627f88c8b3c9b2ecd4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rust-lexical-analyzer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]     --> src/main.rs:1309:24
[INFO] [stdout]      |
[INFO] [stdout] 1309 |     letters.retain(|c| (is_valid_regex_symbol(&c) && c != EPSILON));
[INFO] [stdout]      |                        ^                                         ^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1309 -     letters.retain(|c| (is_valid_regex_symbol(&c) && c != EPSILON));
[INFO] [stdout] 1309 +     letters.retain(|c| is_valid_regex_symbol(&c) && c != EPSILON );
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]     --> src/main.rs:1309:24
[INFO] [stdout]      |
[INFO] [stdout] 1309 |     letters.retain(|c| (is_valid_regex_symbol(&c) && c != EPSILON));
[INFO] [stdout]      |                        ^                                         ^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1309 -     letters.retain(|c| (is_valid_regex_symbol(&c) && c != EPSILON));
[INFO] [stdout] 1309 +     letters.retain(|c| is_valid_regex_symbol(&c) && c != EPSILON );
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `first_time` is never read
[INFO] [stdout]     --> src/main.rs:1066:13
[INFO] [stdout]      |
[INFO] [stdout] 1066 |             first_time = false;
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `first_time` is never read
[INFO] [stdout]     --> src/main.rs:1066:13
[INFO] [stdout]      |
[INFO] [stdout] 1066 |             first_time = false;
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `symbol` is never read
[INFO] [stdout]    --> src/main.rs:139:5
[INFO] [stdout]     |
[INFO] [stdout] 137 | struct Node {
[INFO] [stdout]     |        ---- field in this struct
[INFO] [stdout] 138 |     /// The symbol of the regex that this node represents.
[INFO] [stdout] 139 |     symbol: char,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Node` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `symbol` is never read
[INFO] [stdout]    --> src/main.rs:139:5
[INFO] [stdout]     |
[INFO] [stdout] 137 | struct Node {
[INFO] [stdout]     |        ---- field in this struct
[INFO] [stdout] 138 |     /// The symbol of the regex that this node represents.
[INFO] [stdout] 139 |     symbol: char,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Node` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.18s
[INFO] running `Command { std: "docker" "inspect" "1ad0aaf5a836fe9c8f665f72c19895ea5ef26b2e0c7cef627f88c8b3c9b2ecd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ad0aaf5a836fe9c8f665f72c19895ea5ef26b2e0c7cef627f88c8b3c9b2ecd4", kill_on_drop: false }`
[INFO] [stdout] 1ad0aaf5a836fe9c8f665f72c19895ea5ef26b2e0c7cef627f88c8b3c9b2ecd4
