[INFO] cloning repository https://github.com/xiaoyuechen/mcm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xiaoyuechen/mcm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaoyuechen%2Fmcm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaoyuechen%2Fmcm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 18382484481f88d2181ff7ea266b0244ee060dc7
[INFO] checking xiaoyuechen/mcm against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaoyuechen%2Fmcm" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/xiaoyuechen/mcm
[INFO] finished tweaking git repo https://github.com/xiaoyuechen/mcm
[INFO] tweaked toml for git repo https://github.com/xiaoyuechen/mcm written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/xiaoyuechen/mcm on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/xiaoyuechen/mcm 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6c3156c08c749e79fc14056bdccb3e12701ba5b7241f0e492fe875e75c70f9d
[INFO] running `Command { std: "docker" "start" "-a" "f6c3156c08c749e79fc14056bdccb3e12701ba5b7241f0e492fe875e75c70f9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6c3156c08c749e79fc14056bdccb3e12701ba5b7241f0e492fe875e75c70f9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6c3156c08c749e79fc14056bdccb3e12701ba5b7241f0e492fe875e75c70f9d", kill_on_drop: false }`
[INFO] [stdout] f6c3156c08c749e79fc14056bdccb3e12701ba5b7241f0e492fe875e75c70f9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33eb9a8d4bf5e3d08f35245e25a21b51cec8071993c171b37f21073ec1d41e36
[INFO] running `Command { std: "docker" "start" "-a" "33eb9a8d4bf5e3d08f35245e25a21b51cec8071993c171b37f21073ec1d41e36", kill_on_drop: false }`
[INFO] [stderr]     Checking mcm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/lib.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn huristic(r: &Set<Odd>, s: &Set<Odd>, t: &Set<Odd>) -> Odd {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/lib.rs:55:27
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn huristic(r: &Set<Odd>, s: &Set<Odd>, t: &Set<Odd>) -> Odd {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:55:41
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn huristic(r: &Set<Odd>, s: &Set<Odd>, t: &Set<Odd>) -> Odd {
[INFO] [stdout]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/lib.rs:100:27
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn vertex_fundamental_set(u: &Set<Odd>, v: &Set<Odd>, b: u32) -> Set<Odd> {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lib.rs:100:41
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn vertex_fundamental_set(u: &Set<Odd>, v: &Set<Odd>, b: u32) -> Set<Odd> {
[INFO] [stdout]     |                                         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/lib.rs:100:55
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn vertex_fundamental_set(u: &Set<Odd>, v: &Set<Odd>, b: u32) -> Set<Odd> {
[INFO] [stdout]     |                                                       ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AConfig` is never constructed
[INFO] [stdout]   --> src/lib.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | struct AConfig {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lib.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl AConfig {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 83 |     fn new(l1: u32, l2: u32, s: bool) -> Option<Self> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_op` is never used
[INFO] [stdout]   --> src/lib.rs:92:4
[INFO] [stdout]    |
[INFO] [stdout] 92 | fn a_op(u: Odd, v: Odd, p: &AConfig) -> Odd {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/lib.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn huristic(r: &Set<Odd>, s: &Set<Odd>, t: &Set<Odd>) -> Odd {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/lib.rs:55:27
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn huristic(r: &Set<Odd>, s: &Set<Odd>, t: &Set<Odd>) -> Odd {
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:55:41
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn huristic(r: &Set<Odd>, s: &Set<Odd>, t: &Set<Odd>) -> Odd {
[INFO] [stdout]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/lib.rs:100:27
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn vertex_fundamental_set(u: &Set<Odd>, v: &Set<Odd>, b: u32) -> Set<Odd> {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lib.rs:100:41
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn vertex_fundamental_set(u: &Set<Odd>, v: &Set<Odd>, b: u32) -> Set<Odd> {
[INFO] [stdout]     |                                         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/lib.rs:100:55
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn vertex_fundamental_set(u: &Set<Odd>, v: &Set<Odd>, b: u32) -> Set<Odd> {
[INFO] [stdout]     |                                                       ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "33eb9a8d4bf5e3d08f35245e25a21b51cec8071993c171b37f21073ec1d41e36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33eb9a8d4bf5e3d08f35245e25a21b51cec8071993c171b37f21073ec1d41e36", kill_on_drop: false }`
[INFO] [stdout] 33eb9a8d4bf5e3d08f35245e25a21b51cec8071993c171b37f21073ec1d41e36