[INFO] cloning repository https://github.com/xudifsd/rust_leet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xudifsd/rust_leet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxudifsd%2Frust_leet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxudifsd%2Frust_leet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e00a584e28efb1d38fcd92ba490e402f8e1b6b2f
[INFO] testing xudifsd/rust_leet against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxudifsd%2Frust_leet" "/workspace/builds/worker-46/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-46/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xudifsd/rust_leet on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xudifsd/rust_leet
[INFO] finished tweaking git repo https://github.com/xudifsd/rust_leet
[INFO] tweaked toml for git repo https://github.com/xudifsd/rust_leet written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] crate git repo https://github.com/xudifsd/rust_leet already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded leetcode_test v0.1.1
[INFO] [stderr]   Downloaded leetcode_prelude v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2aeef8d4bb2f0f5924084f8004d1ba71e2856e14c5277c6cf02423e173e6391f
[INFO] running `Command { std: "docker" "start" "-a" "2aeef8d4bb2f0f5924084f8004d1ba71e2856e14c5277c6cf02423e173e6391f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2aeef8d4bb2f0f5924084f8004d1ba71e2856e14c5277c6cf02423e173e6391f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2aeef8d4bb2f0f5924084f8004d1ba71e2856e14c5277c6cf02423e173e6391f", kill_on_drop: false }`
[INFO] [stdout] 2aeef8d4bb2f0f5924084f8004d1ba71e2856e14c5277c6cf02423e173e6391f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef78230be51ba3ff3b46fb0e8ee6f4bbd5863e37ab766714d3f904e7f739df66
[INFO] running `Command { std: "docker" "start" "-a" "ef78230be51ba3ff3b46fb0e8ee6f4bbd5863e37ab766714d3f904e7f739df66", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling leetcode_test v0.1.1
[INFO] [stderr]    Compiling leetcode_prelude v0.2.2
[INFO] [stderr]    Compiling rust_leet v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `tail`
[INFO] [stdout]   --> src/design_linked_list.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     tail: Rc<RefCell<MyListNode>>,
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.51s
[INFO] running `Command { std: "docker" "inspect" "ef78230be51ba3ff3b46fb0e8ee6f4bbd5863e37ab766714d3f904e7f739df66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef78230be51ba3ff3b46fb0e8ee6f4bbd5863e37ab766714d3f904e7f739df66", kill_on_drop: false }`
[INFO] [stdout] ef78230be51ba3ff3b46fb0e8ee6f4bbd5863e37ab766714d3f904e7f739df66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61e6eecfe981b80907b082f653d0d463941e4524ac73722dcb5f407d2218fc3c
[INFO] running `Command { std: "docker" "start" "-a" "61e6eecfe981b80907b082f653d0d463941e4524ac73722dcb5f407d2218fc3c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_leet v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `tail`
[INFO] [stdout]   --> src/design_linked_list.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     tail: Rc<RefCell<MyListNode>>,
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 14.84s
[INFO] running `Command { std: "docker" "inspect" "61e6eecfe981b80907b082f653d0d463941e4524ac73722dcb5f407d2218fc3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61e6eecfe981b80907b082f653d0d463941e4524ac73722dcb5f407d2218fc3c", kill_on_drop: false }`
[INFO] [stdout] 61e6eecfe981b80907b082f653d0d463941e4524ac73722dcb5f407d2218fc3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ff94b38e574d2c1e2e71c6659aec2d1d83eb5f716ca921775f9da6168a2d8b74
[INFO] running `Command { std: "docker" "start" "-a" "ff94b38e574d2c1e2e71c6659aec2d1d83eb5f716ca921775f9da6168a2d8b74", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `tail`
[INFO] [stderr]   --> src/design_linked_list.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     tail: Rc<RefCell<MyListNode>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_leet` (bin "rust_leet" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_leet-3c213d7fffabc56f)
[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" "ff94b38e574d2c1e2e71c6659aec2d1d83eb5f716ca921775f9da6168a2d8b74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff94b38e574d2c1e2e71c6659aec2d1d83eb5f716ca921775f9da6168a2d8b74", kill_on_drop: false }`
[INFO] [stdout] ff94b38e574d2c1e2e71c6659aec2d1d83eb5f716ca921775f9da6168a2d8b74