[INFO] cloning repository https://github.com/yzimhao/rust-gpwd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yzimhao/rust-gpwd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyzimhao%2Frust-gpwd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyzimhao%2Frust-gpwd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eed5c5d866cc63ecb0f86371bbdaec16cb79b17f
[INFO] testing yzimhao/rust-gpwd against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyzimhao%2Frust-gpwd" "/workspace/builds/worker-43/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-43/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yzimhao/rust-gpwd on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yzimhao/rust-gpwd
[INFO] finished tweaking git repo https://github.com/yzimhao/rust-gpwd
[INFO] tweaked toml for git repo https://github.com/yzimhao/rust-gpwd written to /workspace/builds/worker-43/source/Cargo.toml
[INFO] crate git repo https://github.com/yzimhao/rust-gpwd already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded easy_strings v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07f1b00a8d584af4a9710439f1807bb9f6fde98023dd9eeb9736dee8e89ee518
[INFO] running `Command { std: "docker" "start" "-a" "07f1b00a8d584af4a9710439f1807bb9f6fde98023dd9eeb9736dee8e89ee518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07f1b00a8d584af4a9710439f1807bb9f6fde98023dd9eeb9736dee8e89ee518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07f1b00a8d584af4a9710439f1807bb9f6fde98023dd9eeb9736dee8e89ee518", kill_on_drop: false }`
[INFO] [stdout] 07f1b00a8d584af4a9710439f1807bb9f6fde98023dd9eeb9736dee8e89ee518
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e833166cc089ad3888760790d50a7c746069715bbcd44b7c4a2029e6fa0cac2b
[INFO] running `Command { std: "docker" "start" "-a" "e833166cc089ad3888760790d50a7c746069715bbcd44b7c4a2029e6fa0cac2b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling stable_deref_trait v1.0.0
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling md5 v0.3.7
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling easy_strings v0.2.0
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling gpwd v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut result = EZString::from(m3);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` 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 1m 18s
[INFO] running `Command { std: "docker" "inspect" "e833166cc089ad3888760790d50a7c746069715bbcd44b7c4a2029e6fa0cac2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e833166cc089ad3888760790d50a7c746069715bbcd44b7c4a2029e6fa0cac2b", kill_on_drop: false }`
[INFO] [stdout] e833166cc089ad3888760790d50a7c746069715bbcd44b7c4a2029e6fa0cac2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c6551a588a5523bee84d6eea8d4c2ce25ed8cffe5e5b9fe83af1c38e4b9aabf
[INFO] running `Command { std: "docker" "start" "-a" "3c6551a588a5523bee84d6eea8d4c2ce25ed8cffe5e5b9fe83af1c38e4b9aabf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling gpwd v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut result = EZString::from(m3);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` 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 0.35s
[INFO] running `Command { std: "docker" "inspect" "3c6551a588a5523bee84d6eea8d4c2ce25ed8cffe5e5b9fe83af1c38e4b9aabf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c6551a588a5523bee84d6eea8d4c2ce25ed8cffe5e5b9fe83af1c38e4b9aabf", kill_on_drop: false }`
[INFO] [stdout] 3c6551a588a5523bee84d6eea8d4c2ce25ed8cffe5e5b9fe83af1c38e4b9aabf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a8bdca3f6fbe177917ffb4aecc6a2bcee39e515b2474b0c1989505fe7fad4d24
[INFO] running `Command { std: "docker" "start" "-a" "a8bdca3f6fbe177917ffb4aecc6a2bcee39e515b2474b0c1989505fe7fad4d24", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let mut result = EZString::from(m3);
[INFO] [stderr]    |             ----^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `gpwd` (bin "gpwd" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 11.29s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/gpwd-af7e7875e8e5d928)
[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" "a8bdca3f6fbe177917ffb4aecc6a2bcee39e515b2474b0c1989505fe7fad4d24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8bdca3f6fbe177917ffb4aecc6a2bcee39e515b2474b0c1989505fe7fad4d24", kill_on_drop: false }`
[INFO] [stdout] a8bdca3f6fbe177917ffb4aecc6a2bcee39e515b2474b0c1989505fe7fad4d24