[INFO] fetching crate kt 0.0.7...
[INFO] testing kt-0.0.7 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate kt 0.0.7 into /workspace/builds/worker-25/source
[INFO] validating manifest of crates.io crate kt 0.0.7 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kt 0.0.7
[INFO] finished tweaking crates.io crate kt 0.0.7
[INFO] tweaked toml for crates.io crate kt 0.0.7 written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 863f503fd84aab75504eb9b006b0d86bdb4394956914941f0bdd7ccef89153ac
[INFO] running `Command { std: "docker" "start" "-a" "863f503fd84aab75504eb9b006b0d86bdb4394956914941f0bdd7ccef89153ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "863f503fd84aab75504eb9b006b0d86bdb4394956914941f0bdd7ccef89153ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "863f503fd84aab75504eb9b006b0d86bdb4394956914941f0bdd7ccef89153ac", kill_on_drop: false }`
[INFO] [stdout] 863f503fd84aab75504eb9b006b0d86bdb4394956914941f0bdd7ccef89153ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ddc21e801638e9f24722510a46fb59b0d3f6ea1ddee94f09a2a18abc9c9411b
[INFO] running `Command { std: "docker" "start" "-a" "4ddc21e801638e9f24722510a46fb59b0d3f6ea1ddee94f09a2a18abc9c9411b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling kt v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/kt.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 7  | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `Write` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 55 |             use std::io::Write;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/kt.rs:104:54
[INFO] [stdout]     |
[INFO] [stdout] 104 |     format!("Error {} output file: {}", operation, e.description())
[INFO] [stdout]     |                                                      ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.35s
[INFO] running `Command { std: "docker" "inspect" "4ddc21e801638e9f24722510a46fb59b0d3f6ea1ddee94f09a2a18abc9c9411b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ddc21e801638e9f24722510a46fb59b0d3f6ea1ddee94f09a2a18abc9c9411b", kill_on_drop: false }`
[INFO] [stdout] 4ddc21e801638e9f24722510a46fb59b0d3f6ea1ddee94f09a2a18abc9c9411b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 641096f05c938726fb92b6952e6f1fd0b657d601c60c8c4224e334d0040a116f
[INFO] running `Command { std: "docker" "start" "-a" "641096f05c938726fb92b6952e6f1fd0b657d601c60c8c4224e334d0040a116f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling kt v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Write` is imported redundantly
[INFO] [stdout]   --> src/kt.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 7  | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `Write` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 55 |             use std::io::Write;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/kt.rs:104:54
[INFO] [stdout]     |
[INFO] [stdout] 104 |     format!("Error {} output file: {}", operation, e.description())
[INFO] [stdout]     |                                                      ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.36s
[INFO] running `Command { std: "docker" "inspect" "641096f05c938726fb92b6952e6f1fd0b657d601c60c8c4224e334d0040a116f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "641096f05c938726fb92b6952e6f1fd0b657d601c60c8c4224e334d0040a116f", kill_on_drop: false }`
[INFO] [stdout] 641096f05c938726fb92b6952e6f1fd0b657d601c60c8c4224e334d0040a116f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f30d0264481755ac8968cca947ce7fb2c1dc2b6eeb8ba6e06f13402e73a20f6e
[INFO] running `Command { std: "docker" "start" "-a" "f30d0264481755ac8968cca947ce7fb2c1dc2b6eeb8ba6e06f13402e73a20f6e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: the item `Write` is imported redundantly
[INFO] [stderr]   --> src/kt.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 7  | use std::io::prelude::*;
[INFO] [stderr]    |     ------------------- the item `Write` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 55 |             use std::io::Write;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/kt.rs:104:54
[INFO] [stderr]     |
[INFO] [stderr] 104 |     format!("Error {} output file: {}", operation, e.description())
[INFO] [stderr]     |                                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `kt` (bin "kt" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 27.64s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/kt-0da53abdba875f34)
[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" "f30d0264481755ac8968cca947ce7fb2c1dc2b6eeb8ba6e06f13402e73a20f6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f30d0264481755ac8968cca947ce7fb2c1dc2b6eeb8ba6e06f13402e73a20f6e", kill_on_drop: false }`
[INFO] [stdout] f30d0264481755ac8968cca947ce7fb2c1dc2b6eeb8ba6e06f13402e73a20f6e