[INFO] cloning repository https://github.com/calesce/yamb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/calesce/yamb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcalesce%2Fyamb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcalesce%2Fyamb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ba7d8652bf21bbc6e506a244290d43cd81b85fa
[INFO] testing calesce/yamb against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcalesce%2Fyamb" "/workspace/builds/worker-75/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-75/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/calesce/yamb on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/calesce/yamb
[INFO] finished tweaking git repo https://github.com/calesce/yamb
[INFO] tweaked toml for git repo https://github.com/calesce/yamb written to /workspace/builds/worker-75/source/Cargo.toml
[INFO] crate git repo https://github.com/calesce/yamb already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b425952072c34ff6bddd0f77193a8cebeae25fff5d5653a45c1f1f4d7b33eca1
[INFO] running `Command { std: "docker" "start" "-a" "b425952072c34ff6bddd0f77193a8cebeae25fff5d5653a45c1f1f4d7b33eca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b425952072c34ff6bddd0f77193a8cebeae25fff5d5653a45c1f1f4d7b33eca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b425952072c34ff6bddd0f77193a8cebeae25fff5d5653a45c1f1f4d7b33eca1", kill_on_drop: false }`
[INFO] [stdout] b425952072c34ff6bddd0f77193a8cebeae25fff5d5653a45c1f1f4d7b33eca1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0725063b87b886fa74114c3f94ceed120d9d62c4f279515356295fc846e61520
[INFO] running `Command { std: "docker" "start" "-a" "0725063b87b886fa74114c3f94ceed120d9d62c4f279515356295fc846e61520", kill_on_drop: false }`
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling yamb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/main.rs:37:46
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn read_file(path: &Path) -> std::io::Result<(String)> {
[INFO] [stdout]    |                                              ^      ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 37 - fn read_file(path: &Path) -> std::io::Result<(String)> {
[INFO] [stdout] 37 + fn read_file(path: &Path) -> std::io::Result<String> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/main.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Ok((buffer))
[INFO] [stdout]    |        ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 42 -     Ok((buffer))
[INFO] [stdout] 42 +     Ok(buffer)
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.84s
[INFO] running `Command { std: "docker" "inspect" "0725063b87b886fa74114c3f94ceed120d9d62c4f279515356295fc846e61520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0725063b87b886fa74114c3f94ceed120d9d62c4f279515356295fc846e61520", kill_on_drop: false }`
[INFO] [stdout] 0725063b87b886fa74114c3f94ceed120d9d62c4f279515356295fc846e61520
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22d89c2a7d31d1b702c134ca16427e84be9e2d1e23054a1e1cd30d9ed5279e76
[INFO] running `Command { std: "docker" "start" "-a" "22d89c2a7d31d1b702c134ca16427e84be9e2d1e23054a1e1cd30d9ed5279e76", kill_on_drop: false }`
[INFO] [stderr]    Compiling yamb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/main.rs:37:46
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn read_file(path: &Path) -> std::io::Result<(String)> {
[INFO] [stdout]    |                                              ^      ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 37 - fn read_file(path: &Path) -> std::io::Result<(String)> {
[INFO] [stdout] 37 + fn read_file(path: &Path) -> std::io::Result<String> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/main.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Ok((buffer))
[INFO] [stdout]    |        ^      ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 42 -     Ok((buffer))
[INFO] [stdout] 42 +     Ok(buffer)
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "22d89c2a7d31d1b702c134ca16427e84be9e2d1e23054a1e1cd30d9ed5279e76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22d89c2a7d31d1b702c134ca16427e84be9e2d1e23054a1e1cd30d9ed5279e76", kill_on_drop: false }`
[INFO] [stdout] 22d89c2a7d31d1b702c134ca16427e84be9e2d1e23054a1e1cd30d9ed5279e76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 22c5aa01c329038fe106eb16b67a0639ce2b2e52097c009e16881de3d3e45f94
[INFO] running `Command { std: "docker" "start" "-a" "22c5aa01c329038fe106eb16b67a0639ce2b2e52097c009e16881de3d3e45f94", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:37:46
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn read_file(path: &Path) -> std::io::Result<(String)> {
[INFO] [stderr]    |                                              ^      ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 37 - fn read_file(path: &Path) -> std::io::Result<(String)> {
[INFO] [stderr] 37 + fn read_file(path: &Path) -> std::io::Result<String> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Ok((buffer))
[INFO] [stderr]    |        ^      ^
[INFO] [stderr]    |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 42 -     Ok((buffer))
[INFO] [stderr] 42 +     Ok(buffer)
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `yamb` (bin "yamb" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/yamb-0e3d932b19ae02d4)
[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" "22c5aa01c329038fe106eb16b67a0639ce2b2e52097c009e16881de3d3e45f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22c5aa01c329038fe106eb16b67a0639ce2b2e52097c009e16881de3d3e45f94", kill_on_drop: false }`
[INFO] [stdout] 22c5aa01c329038fe106eb16b67a0639ce2b2e52097c009e16881de3d3e45f94