[INFO] cloning repository https://github.com/hsmtkk/potential-lamp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hsmtkk/potential-lamp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsmtkk%2Fpotential-lamp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsmtkk%2Fpotential-lamp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aeeb0b55c2c435e7d2cd9a55d39286ce22b6d34f
[INFO] building hsmtkk/potential-lamp against try#9a3ef2cd3ecaae3c6ef59768612837d797602a6d for pr-137044-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhsmtkk%2Fpotential-lamp" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hsmtkk/potential-lamp on toolchain 9a3ef2cd3ecaae3c6ef59768612837d797602a6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hsmtkk/potential-lamp
[INFO] finished tweaking git repo https://github.com/hsmtkk/potential-lamp
[INFO] tweaked toml for git repo https://github.com/hsmtkk/potential-lamp written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hsmtkk/potential-lamp 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" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d082a03e92c8c8d5dc31f7c02e00430fc0723a260bf56c58b2525e816a9379d
[INFO] running `Command { std: "docker" "start" "-a" "0d082a03e92c8c8d5dc31f7c02e00430fc0723a260bf56c58b2525e816a9379d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d082a03e92c8c8d5dc31f7c02e00430fc0723a260bf56c58b2525e816a9379d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d082a03e92c8c8d5dc31f7c02e00430fc0723a260bf56c58b2525e816a9379d", kill_on_drop: false }`
[INFO] [stdout] 0d082a03e92c8c8d5dc31f7c02e00430fc0723a260bf56c58b2525e816a9379d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b33fdda83a2140a296e9b4876f7f025428b0b2b73f259dfed7544e5b0fd84ba8
[INFO] running `Command { std: "docker" "start" "-a" "b33fdda83a2140a296e9b4876f7f025428b0b2b73f259dfed7544e5b0fd84ba8", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling potential-lamp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `GrepResult` is never constructed
[INFO] [stdout]  --> src/grep.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct GrepResult {
[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/grep.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl GrepResult {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 8 |     fn new(number:u32, line:String) -> GrepResult {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `grep` is never used
[INFO] [stdout]   --> src/grep.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn grep(word: &str, lines:Vec<String>) -> Vec<GrepResult>{
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "b33fdda83a2140a296e9b4876f7f025428b0b2b73f259dfed7544e5b0fd84ba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b33fdda83a2140a296e9b4876f7f025428b0b2b73f259dfed7544e5b0fd84ba8", kill_on_drop: false }`
[INFO] [stdout] b33fdda83a2140a296e9b4876f7f025428b0b2b73f259dfed7544e5b0fd84ba8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9a3ef2cd3ecaae3c6ef59768612837d797602a6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b121547c1449a71b0abd947e60891d6d9834973782893a494124a062c2275cc9
[INFO] running `Command { std: "docker" "start" "-a" "b121547c1449a71b0abd947e60891d6d9834973782893a494124a062c2275cc9", kill_on_drop: false }`
[INFO] [stdout] warning: struct `GrepResult` is never constructed
[INFO] [stdout]  --> src/grep.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct GrepResult {
[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/grep.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl GrepResult {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 8 |     fn new(number:u32, line:String) -> GrepResult {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `grep` is never used
[INFO] [stdout]   --> src/grep.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn grep(word: &str, lines:Vec<String>) -> Vec<GrepResult>{
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling potential-lamp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "b121547c1449a71b0abd947e60891d6d9834973782893a494124a062c2275cc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b121547c1449a71b0abd947e60891d6d9834973782893a494124a062c2275cc9", kill_on_drop: false }`
[INFO] [stdout] b121547c1449a71b0abd947e60891d6d9834973782893a494124a062c2275cc9