[INFO] cloning repository https://github.com/sdukshis/rust-calc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sdukshis/rust-calc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsdukshis%2Frust-calc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsdukshis%2Frust-calc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 93b4567bec778d4562f22a883621b7ee8982a51e
[INFO] testing sdukshis/rust-calc against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsdukshis%2Frust-calc" "/workspace/builds/worker-71/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-71/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sdukshis/rust-calc on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sdukshis/rust-calc
[INFO] finished tweaking git repo https://github.com/sdukshis/rust-calc
[INFO] tweaked toml for git repo https://github.com/sdukshis/rust-calc written to /workspace/builds/worker-71/source/Cargo.toml
[INFO] crate git repo https://github.com/sdukshis/rust-calc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0201ce9e59e3c3cd13ff5ee5400c8eb25c65cab861d68aab4ca05e20b6adcfa9
[INFO] running `Command { std: "docker" "start" "-a" "0201ce9e59e3c3cd13ff5ee5400c8eb25c65cab861d68aab4ca05e20b6adcfa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0201ce9e59e3c3cd13ff5ee5400c8eb25c65cab861d68aab4ca05e20b6adcfa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0201ce9e59e3c3cd13ff5ee5400c8eb25c65cab861d68aab4ca05e20b6adcfa9", kill_on_drop: false }`
[INFO] [stdout] 0201ce9e59e3c3cd13ff5ee5400c8eb25c65cab861d68aab4ca05e20b6adcfa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f4b7cc238c2a62cfcf7b1cd918327a36eb809f56c609ab3e3ffc35aabb1b45f
[INFO] running `Command { std: "docker" "start" "-a" "0f4b7cc238c2a62cfcf7b1cd918327a36eb809f56c609ab3e3ffc35aabb1b45f", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.2.3
[INFO] [stdout] error[E0425]: cannot find function `at_exit` in module `rt`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/log-0.2.3/src/lib.rs:534:9
[INFO] [stdout]     |
[INFO] [stdout] 534 |     rt::at_exit(|| {
[INFO] [stdout]     |         ^^^^^^^ not found in `rt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/log-0.2.3/src/lib.rs:145:1
[INFO] [stdout]     |
[INFO] [stdout] 145 | #![feature(core, std_misc)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'rt': this public module should not exist and is highly likely to disappear
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/log-0.2.3/src/lib.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | use std::rt;
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `log` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "0f4b7cc238c2a62cfcf7b1cd918327a36eb809f56c609ab3e3ffc35aabb1b45f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f4b7cc238c2a62cfcf7b1cd918327a36eb809f56c609ab3e3ffc35aabb1b45f", kill_on_drop: false }`
[INFO] [stdout] 0f4b7cc238c2a62cfcf7b1cd918327a36eb809f56c609ab3e3ffc35aabb1b45f