[INFO] cloning repository https://github.com/Super-King-Crimson/Chapter20
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Super-King-Crimson/Chapter20" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuper-King-Crimson%2FChapter20", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuper-King-Crimson%2FChapter20'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6242c3a4823d1a4c0e4d155a9e3cb9ca0b8c8b5
[INFO] checking Super-King-Crimson/Chapter20 against try#1c4199da70f816f2239f41c55168ff75a3663718 for 155501-infallible-never-no-reservation
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuper-King-Crimson%2FChapter20" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Super-King-Crimson/Chapter20
[INFO] finished tweaking git repo https://github.com/Super-King-Crimson/Chapter20
[INFO] tweaked toml for git repo https://github.com/Super-King-Crimson/Chapter20 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Super-King-Crimson/Chapter20 on toolchain 1c4199da70f816f2239f41c55168ff75a3663718
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1c4199da70f816f2239f41c55168ff75a3663718" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Super-King-Crimson/Chapter20 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" "+1c4199da70f816f2239f41c55168ff75a3663718" "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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1c4199da70f816f2239f41c55168ff75a3663718" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00e110826464b7ec6ad4d61e521a824785f0031164f0530b6fd65ade655b42ea
[INFO] running `Command { std: "docker" "start" "-a" "00e110826464b7ec6ad4d61e521a824785f0031164f0530b6fd65ade655b42ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00e110826464b7ec6ad4d61e521a824785f0031164f0530b6fd65ade655b42ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00e110826464b7ec6ad4d61e521a824785f0031164f0530b6fd65ade655b42ea", kill_on_drop: false }`
[INFO] [stdout] 00e110826464b7ec6ad4d61e521a824785f0031164f0530b6fd65ade655b42ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1c4199da70f816f2239f41c55168ff75a3663718" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2fc5849634afeb9a54646fdb472db3f5779f5c3f2c83eb618566c329ed7247f3
[INFO] running `Command { std: "docker" "start" "-a" "2fc5849634afeb9a54646fdb472db3f5779f5c3f2c83eb618566c329ed7247f3", kill_on_drop: false }`
[INFO] [stderr]     Checking chapter20 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `method` and `version` are never read
[INFO] [stdout]   --> src/app.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct HttpRequest {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 36 |     pub method: HttpMethod,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 37 |     pub uri: String,
[INFO] [stdout] 38 |     pub version: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HttpRequest` has a derived impl for the trait `Debug`, but this is 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: trait `Tap` is never used
[INFO] [stdout]  --> src/tap.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Tap<F, T=Self> where F: FnOnce(&T) -> () {
[INFO] [stdout]   |           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `TapMut` is never used
[INFO] [stdout]   --> src/tap.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub trait TapMut<F, T=Self> where F: FnOnce(&mut T) {
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `method` and `version` are never read
[INFO] [stdout]   --> src/app.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct HttpRequest {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 36 |     pub method: HttpMethod,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 37 |     pub uri: String,
[INFO] [stdout] 38 |     pub version: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `HttpRequest` has a derived impl for the trait `Debug`, but this is 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: trait `Tap` is never used
[INFO] [stdout]  --> src/tap.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Tap<F, T=Self> where F: FnOnce(&T) -> () {
[INFO] [stdout]   |           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `TapMut` is never used
[INFO] [stdout]   --> src/tap.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub trait TapMut<F, T=Self> where F: FnOnce(&mut T) {
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "2fc5849634afeb9a54646fdb472db3f5779f5c3f2c83eb618566c329ed7247f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fc5849634afeb9a54646fdb472db3f5779f5c3f2c83eb618566c329ed7247f3", kill_on_drop: false }`
[INFO] [stdout] 2fc5849634afeb9a54646fdb472db3f5779f5c3f2c83eb618566c329ed7247f3
