[INFO] fetching crate coverm 0.6.1...
[INFO] documenting coverm-0.6.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate coverm 0.6.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate coverm 0.6.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate coverm 0.6.1
[INFO] finished tweaking crates.io crate coverm 0.6.1
[INFO] tweaked toml for crates.io crate coverm 0.6.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate coverm 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1fce0ae10c601184fef7125f4cf0f0ba3eded247606436e711648a6f0c31ebf4
[INFO] running `Command { std: "docker" "start" "-a" "1fce0ae10c601184fef7125f4cf0f0ba3eded247606436e711648a6f0c31ebf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fce0ae10c601184fef7125f4cf0f0ba3eded247606436e711648a6f0c31ebf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fce0ae10c601184fef7125f4cf0f0ba3eded247606436e711648a6f0c31ebf4", kill_on_drop: false }`
[INFO] [stdout] 1fce0ae10c601184fef7125f4cf0f0ba3eded247606436e711648a6f0c31ebf4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "RUSTDOCFLAGS=--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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5937edeb90437a7d3917e9cb9a5e8982169d50af37f47bd8e0e69da458353a61
[INFO] running `Command { std: "docker" "start" "-a" "5937edeb90437a7d3917e9cb9a5e8982169d50af37f47bd8e0e69da458353a61", kill_on_drop: false }`
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[INFO] [stderr]     Checking coverm v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting coverm v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/mapping_parameters.rs:159:16
[INFO] [stdout]     |
[INFO] [stdout] 159 |           panic!(format!(
[INFO] [stdout]     |  ________________^
[INFO] [stdout] 160 | |             "The reference specified '{}' does not appear to exist",
[INFO] [stdout] 161 | |             &reference_path
[INFO] [stdout] 162 | |         ));
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[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] 159 |         panic!(
[INFO] [stdout] 160 |             "The reference specified '{}' does not appear to exist",
[INFO] [stdout] 161 |             &reference_path
[INFO] [stdout] 162 |         );
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/mapping_parameters.rs:164:16
[INFO] [stdout]     |
[INFO] [stdout] 164 |           panic!(format!(
[INFO] [stdout]     |  ________________^
[INFO] [stdout] 165 | |             "The reference specified '{}' should be a file, not e.g. a directory",
[INFO] [stdout] 166 | |             &reference_path
[INFO] [stdout] 167 | |         ));
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[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] 164 |         panic!(
[INFO] [stdout] 165 |             "The reference specified '{}' should be a file, not e.g. a directory",
[INFO] [stdout] 166 |             &reference_path
[INFO] [stdout] 167 |         );
[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 38.86s
[INFO] running `Command { std: "docker" "inspect" "5937edeb90437a7d3917e9cb9a5e8982169d50af37f47bd8e0e69da458353a61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5937edeb90437a7d3917e9cb9a5e8982169d50af37f47bd8e0e69da458353a61", kill_on_drop: false }`
[INFO] [stdout] 5937edeb90437a7d3917e9cb9a5e8982169d50af37f47bd8e0e69da458353a61
