[INFO] fetching crate contact 0.4.2...
[INFO] checking contact-0.4.2 against 1.55.0 for beta-1.56-3
[INFO] extracting crate contact 0.4.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate contact 0.4.2 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 crates.io crate contact 0.4.2
[INFO] finished tweaking crates.io crate contact 0.4.2
[INFO] tweaked toml for crates.io crate contact 0.4.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 9673eac22fbf80c9e15df1ea4e52aa6e86e9da74e9e7f45a5d56fc9dbf2619df
[INFO] running `Command { std: "docker" "start" "-a" "9673eac22fbf80c9e15df1ea4e52aa6e86e9da74e9e7f45a5d56fc9dbf2619df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9673eac22fbf80c9e15df1ea4e52aa6e86e9da74e9e7f45a5d56fc9dbf2619df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9673eac22fbf80c9e15df1ea4e52aa6e86e9da74e9e7f45a5d56fc9dbf2619df", kill_on_drop: false }`
[INFO] [stdout] 9673eac22fbf80c9e15df1ea4e52aa6e86e9da74e9e7f45a5d56fc9dbf2619df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7066aa6b7709cb6b0aaad18fc36941f07e7aa05409afab0efa6dbdef45436d7
[INFO] running `Command { std: "docker" "start" "-a" "c7066aa6b7709cb6b0aaad18fc36941f07e7aa05409afab0efa6dbdef45436d7", kill_on_drop: false }`
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[INFO] [stderr]     Checking cpufeatures v0.2.1
[INFO] [stderr]    Compiling const_fn v0.4.8
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[INFO] [stderr]     Checking contact v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/client/mod.rs:75:20
[INFO] [stdout]    |
[INFO] [stdout] 75 |             panic!(format!("{:?}", e))
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 75 |             panic!("{:?}", e)
[INFO] [stdout]    |                   --       --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.61s
[INFO] running `Command { std: "docker" "inspect" "c7066aa6b7709cb6b0aaad18fc36941f07e7aa05409afab0efa6dbdef45436d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7066aa6b7709cb6b0aaad18fc36941f07e7aa05409afab0efa6dbdef45436d7", kill_on_drop: false }`
[INFO] [stdout] c7066aa6b7709cb6b0aaad18fc36941f07e7aa05409afab0efa6dbdef45436d7
