[INFO] cloning repository https://github.com/PandaTheSlayer/rust-lexer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PandaTheSlayer/rust-lexer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPandaTheSlayer%2Frust-lexer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPandaTheSlayer%2Frust-lexer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 038e0a860ed2f863f39c7bd1729f2f980c4dc270
[INFO] checking PandaTheSlayer/rust-lexer against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPandaTheSlayer%2Frust-lexer" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PandaTheSlayer/rust-lexer on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PandaTheSlayer/rust-lexer
[INFO] finished tweaking git repo https://github.com/PandaTheSlayer/rust-lexer
[INFO] tweaked toml for git repo https://github.com/PandaTheSlayer/rust-lexer written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/PandaTheSlayer/rust-lexer 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded backtrace v0.3.16
[INFO] [stderr]   Downloaded syn v0.15.34
[INFO] [stderr]   Downloaded libc v0.2.54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb146d66046983803eb7b2d67458b38d02b0ce3a8671e8bac026ba7226e0c3b5
[INFO] running `Command { std: "docker" "start" "-a" "eb146d66046983803eb7b2d67458b38d02b0ce3a8671e8bac026ba7226e0c3b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb146d66046983803eb7b2d67458b38d02b0ce3a8671e8bac026ba7226e0c3b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb146d66046983803eb7b2d67458b38d02b0ce3a8671e8bac026ba7226e0c3b5", kill_on_drop: false }`
[INFO] [stdout] eb146d66046983803eb7b2d67458b38d02b0ce3a8671e8bac026ba7226e0c3b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1870ffe5e721971012fd5a2a2a14455f628568e5a30e4c2ccfc24e512f1f6bb7
[INFO] running `Command { std: "docker" "start" "-a" "1870ffe5e721971012fd5a2a2a14455f628568e5a30e4c2ccfc24e512f1f6bb7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling libc v0.2.54
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking rustc-demangle v0.1.14
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]    Compiling backtrace v0.3.16
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking management-system v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `name` and `employees` are never read
[INFO] [stdout]  --> src/department.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Department {
[INFO] [stdout]   |            ---------- fields in this struct
[INFO] [stdout] 4 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     employees: Vec<crate::user::User>,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Department` 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: field `0` is never read
[INFO] [stdout]   --> src/lexer.rs:24:24
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Operand<'a>(&'a str);
[INFO] [stdout]    |            -------     ^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Operand` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Operand<'a>(());
[INFO] [stdout]    |                        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `operation`, `user`, and `department` are never read
[INFO] [stdout]   --> src/lexer.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Expression<'a> {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 42 |     operation: Operation,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 43 |     user: Operand<'a>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 44 |     department: Operand<'a>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expression` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `employees` are never read
[INFO] [stdout]  --> src/department.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Department {
[INFO] [stdout]   |            ---------- fields in this struct
[INFO] [stdout] 4 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     employees: Vec<crate::user::User>,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Department` 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: field `0` is never read
[INFO] [stdout]   --> src/lexer.rs:24:24
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Operand<'a>(&'a str);
[INFO] [stdout]    |            -------     ^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Operand` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Operand<'a>(());
[INFO] [stdout]    |                        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `operation`, `user`, and `department` are never read
[INFO] [stdout]   --> src/lexer.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Expression<'a> {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 42 |     operation: Operation,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 43 |     user: Operand<'a>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 44 |     department: Operand<'a>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expression` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.21s
[INFO] running `Command { std: "docker" "inspect" "1870ffe5e721971012fd5a2a2a14455f628568e5a30e4c2ccfc24e512f1f6bb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1870ffe5e721971012fd5a2a2a14455f628568e5a30e4c2ccfc24e512f1f6bb7", kill_on_drop: false }`
[INFO] [stdout] 1870ffe5e721971012fd5a2a2a14455f628568e5a30e4c2ccfc24e512f1f6bb7