[INFO] cloning repository https://github.com/bynect/rewriter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bynect/rewriter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbynect%2Frewriter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbynect%2Frewriter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 612f6802a095f41121df1c4642ec632e96b97de7
[INFO] checking bynect/rewriter against master#64b185eddaa1d7ddf5e0c024be23b9cbba6c1722 for pr-143929
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbynect%2Frewriter" "/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/bynect/rewriter
[INFO] finished tweaking git repo https://github.com/bynect/rewriter
[INFO] tweaked toml for git repo https://github.com/bynect/rewriter written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bynect/rewriter on toolchain 64b185eddaa1d7ddf5e0c024be23b9cbba6c1722
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/bynect/rewriter 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" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded immutable-map v0.1.2
[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" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4fea9570d53b91b149ea219a40a95f1dec35a0b2197350c435586cadbf426fe4
[INFO] running `Command { std: "docker" "start" "-a" "4fea9570d53b91b149ea219a40a95f1dec35a0b2197350c435586cadbf426fe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fea9570d53b91b149ea219a40a95f1dec35a0b2197350c435586cadbf426fe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fea9570d53b91b149ea219a40a95f1dec35a0b2197350c435586cadbf426fe4", kill_on_drop: false }`
[INFO] [stdout] 4fea9570d53b91b149ea219a40a95f1dec35a0b2197350c435586cadbf426fe4
[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" "+64b185eddaa1d7ddf5e0c024be23b9cbba6c1722" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a771379e48558d718ad6d5f22e39c87e7ddc89b99b4bbbe904c712c86cf48f6
[INFO] running `Command { std: "docker" "start" "-a" "7a771379e48558d718ad6d5f22e39c87e7ddc89b99b4bbbe904c712c86cf48f6", kill_on_drop: false }`
[INFO] [stderr]     Checking immutable-map v0.1.2
[INFO] [stderr]     Checking rewriter v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `app`, `lam`, `let_`, `var`, and `freevar` are never used
[INFO] [stdout]   --> src/expr.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Expr {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 16 |     pub fn app(e1: Expr, e2: Expr) -> Expr {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn lam(x: &str, e: Expr) -> Expr {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn let_(x: &str, e1: Expr, e2: Expr) -> Expr {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn var(x: &str) -> Expr {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn freevar(&self, x: &str) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split` is never used
[INFO] [stdout]   --> src/split.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn split<'a>(s: &'a str, p: fn(u8) -> bool) -> Split<'a> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `app`, `lam`, `let_`, `var`, and `freevar` are never used
[INFO] [stdout]   --> src/expr.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Expr {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 16 |     pub fn app(e1: Expr, e2: Expr) -> Expr {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn lam(x: &str, e: Expr) -> Expr {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn let_(x: &str, e1: Expr, e2: Expr) -> Expr {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     pub fn var(x: &str) -> Expr {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn freevar(&self, x: &str) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split` is never used
[INFO] [stdout]   --> src/split.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn split<'a>(s: &'a str, p: fn(u8) -> bool) -> Split<'a> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "7a771379e48558d718ad6d5f22e39c87e7ddc89b99b4bbbe904c712c86cf48f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a771379e48558d718ad6d5f22e39c87e7ddc89b99b4bbbe904c712c86cf48f6", kill_on_drop: false }`
[INFO] [stdout] 7a771379e48558d718ad6d5f22e39c87e7ddc89b99b4bbbe904c712c86cf48f6