[INFO] cloning repository https://github.com/anandijain/matcher.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anandijain/matcher.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanandijain%2Fmatcher.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanandijain%2Fmatcher.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c6a775dbf2f41d274281ad16be40b0e626673c72
[INFO] checking anandijain/matcher.rs/c6a775dbf2f41d274281ad16be40b0e626673c72 against master#39cb3386ddc6c71657418be28dbb3987eea4aa4b for pr-133536
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanandijain%2Fmatcher.rs" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anandijain/matcher.rs on toolchain 39cb3386ddc6c71657418be28dbb3987eea4aa4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/anandijain/matcher.rs
[INFO] finished tweaking git repo https://github.com/anandijain/matcher.rs
[INFO] tweaked toml for git repo https://github.com/anandijain/matcher.rs written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/anandijain/matcher.rs 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" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b295b09e9defc581f4049526ede8b2b27e83bca2caba2a1cd34f8b80cbeee53d
[INFO] running `Command { std: "docker" "start" "-a" "b295b09e9defc581f4049526ede8b2b27e83bca2caba2a1cd34f8b80cbeee53d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b295b09e9defc581f4049526ede8b2b27e83bca2caba2a1cd34f8b80cbeee53d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b295b09e9defc581f4049526ede8b2b27e83bca2caba2a1cd34f8b80cbeee53d", kill_on_drop: false }`
[INFO] [stdout] b295b09e9defc581f4049526ede8b2b27e83bca2caba2a1cd34f8b80cbeee53d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fe8aa0c41921139cb0e28214c0a80b9b8700e223de04b58a8c1eae06a042a90
[INFO] running `Command { std: "docker" "start" "-a" "8fe8aa0c41921139cb0e28214c0a80b9b8700e223de04b58a8c1eae06a042a90", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]     Checking matcher v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:53:18
[INFO] [stdout]    |
[INFO] [stdout] 53 |             for (i, p) in pat.iter().enumerate() {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:53:18
[INFO] [stdout]    |
[INFO] [stdout] 53 |             for (i, p) in pat.iter().enumerate() {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main.rs:84:19
[INFO] [stdout]    |
[INFO] [stdout] 84 |         Expr::Sym(name) => panic!(),
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main.rs:84:19
[INFO] [stdout]    |
[INFO] [stdout] 84 |         Expr::Sym(name) => panic!(),
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |             Pattern::Literal(name, val) => {
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/main.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |             Pattern::Literal(name, val) => {
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Sequence` is never constructed
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | enum Pattern {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 9  |     Literal(String, Expr),              // name, expr
[INFO] [stdout] 10 |     Sequence(String, Option<Expr>),     // name, head
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Pattern` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Sequence` is never constructed
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | enum Pattern {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 9  |     Literal(String, Expr),              // name, expr
[INFO] [stdout] 10 |     Sequence(String, Option<Expr>),     // name, head
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Pattern` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `Command { std: "docker" "inspect" "8fe8aa0c41921139cb0e28214c0a80b9b8700e223de04b58a8c1eae06a042a90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fe8aa0c41921139cb0e28214c0a80b9b8700e223de04b58a8c1eae06a042a90", kill_on_drop: false }`
[INFO] [stdout] 8fe8aa0c41921139cb0e28214c0a80b9b8700e223de04b58a8c1eae06a042a90