[INFO] cloning repository https://github.com/kmughal/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kmughal/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkmughal%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkmughal%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1cc4abc2da21a8fad28de04831de731bf457f92d
[INFO] testing kmughal/learn-rust against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkmughal%2Flearn-rust" "/workspace/builds/worker-86/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-86/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kmughal/learn-rust on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kmughal/learn-rust
[INFO] finished tweaking git repo https://github.com/kmughal/learn-rust
[INFO] tweaked toml for git repo https://github.com/kmughal/learn-rust written to /workspace/builds/worker-86/source/Cargo.toml
[INFO] crate git repo https://github.com/kmughal/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 467be3310b6103421a658af68c204f7700d0e64440e6639f48208bf2e65e7b44
[INFO] running `Command { std: "docker" "start" "-a" "467be3310b6103421a658af68c204f7700d0e64440e6639f48208bf2e65e7b44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "467be3310b6103421a658af68c204f7700d0e64440e6639f48208bf2e65e7b44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "467be3310b6103421a658af68c204f7700d0e64440e6639f48208bf2e65e7b44", kill_on_drop: false }`
[INFO] [stdout] 467be3310b6103421a658af68c204f7700d0e64440e6639f48208bf2e65e7b44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba6a1176f7fd778b6e5edc03960fe73871e1f52dd07e59b499e8e9e702e59237
[INFO] running `Command { std: "docker" "start" "-a" "ba6a1176f7fd778b6e5edc03960fe73871e1f52dd07e59b499e8e9e702e59237", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustserver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     id: usize,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `response` is never read
[INFO] [stdout]   --> src/bin/main.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut response = String::new();
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.78s
[INFO] running `Command { std: "docker" "inspect" "ba6a1176f7fd778b6e5edc03960fe73871e1f52dd07e59b499e8e9e702e59237", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba6a1176f7fd778b6e5edc03960fe73871e1f52dd07e59b499e8e9e702e59237", kill_on_drop: false }`
[INFO] [stdout] ba6a1176f7fd778b6e5edc03960fe73871e1f52dd07e59b499e8e9e702e59237
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6985ecb381901c0f534dc0fb513a3027facfcfc314396aa87021d0d08e3483ef
[INFO] running `Command { std: "docker" "start" "-a" "6985ecb381901c0f534dc0fb513a3027facfcfc314396aa87021d0d08e3483ef", kill_on_drop: false }`
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     id: usize,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rustserver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `response` is never read
[INFO] [stdout]   --> src/bin/main.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut response = String::new();
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     id: usize,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "6985ecb381901c0f534dc0fb513a3027facfcfc314396aa87021d0d08e3483ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6985ecb381901c0f534dc0fb513a3027facfcfc314396aa87021d0d08e3483ef", kill_on_drop: false }`
[INFO] [stdout] 6985ecb381901c0f534dc0fb513a3027facfcfc314396aa87021d0d08e3483ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9ecdcaf4f5ad5f6cb1f8934de324254363277a395d9549ab7552602262fe72b9
[INFO] running `Command { std: "docker" "start" "-a" "9ecdcaf4f5ad5f6cb1f8934de324254363277a395d9549ab7552602262fe72b9", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     id: usize,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rustserver` (lib) generated 1 warning
[INFO] [stderr] warning: value assigned to `response` is never read
[INFO] [stderr]   --> src/bin/main.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut response = String::new();
[INFO] [stderr]    |             ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `rustserver` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: `rustserver` (bin "main" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rustserver-c25fa51c7ba883ab)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/main-1d57dab9bdb86442)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rustserver
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9ecdcaf4f5ad5f6cb1f8934de324254363277a395d9549ab7552602262fe72b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ecdcaf4f5ad5f6cb1f8934de324254363277a395d9549ab7552602262fe72b9", kill_on_drop: false }`
[INFO] [stdout] 9ecdcaf4f5ad5f6cb1f8934de324254363277a395d9549ab7552602262fe72b9