[INFO] fetching crate ruler 0.1.4...
[INFO] checking ruler-0.1.4 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] extracting crate ruler 0.1.4 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ruler 0.1.4 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruler 0.1.4
[INFO] finished tweaking crates.io crate ruler 0.1.4
[INFO] tweaked toml for crates.io crate ruler 0.1.4 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate ruler 0.1.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c7df84627392a669b444be25905af8a7d79910d5149a8b33462d312425ea6c3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5c7df84627392a669b444be25905af8a7d79910d5149a8b33462d312425ea6c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c7df84627392a669b444be25905af8a7d79910d5149a8b33462d312425ea6c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c7df84627392a669b444be25905af8a7d79910d5149a8b33462d312425ea6c3", kill_on_drop: false }`
[INFO] [stdout] 5c7df84627392a669b444be25905af8a7d79910d5149a8b33462d312425ea6c3
[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" "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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d61bd0c1eb88a9b34a1b71a8f39c9a5bfb8b601de05b98cfe4ced9463dcb71b4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d61bd0c1eb88a9b34a1b71a8f39c9a5bfb8b601de05b98cfe4ced9463dcb71b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking bitflags v1.2.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking lipsum v0.7.0
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking multimap v0.8.1
[INFO] [stderr]     Checking ruler v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]     --> src/work.rs:1474:106
[INFO] [stdout]      |
[INFO] [stdout] 1474 | ...                   _ => panic!("Expected poem to already be correct, was some other work option {}"),
[INFO] [stdout]      |                                                                                                    ^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(panic_fmt)]` on by default
[INFO] [stdout]      = note: this message is not used as a format string when given without arguments, but will be in a future Rust edition
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]      |
[INFO] [stdout] 1474 |                             _ => panic!("Expected poem to already be correct, was some other work option {}", ...),
[INFO] [stdout]      |                                                                                                             ^^^^^
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]      |
[INFO] [stdout] 1474 |                             _ => panic!("{}", "Expected poem to already be correct, was some other work option {}"),
[INFO] [stdout]      |                                         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]     --> src/work.rs:1477:99
[INFO] [stdout]      |
[INFO] [stdout] 1477 |                     _ => panic!("Expected poem to already be resolved, was some other work option {}"),
[INFO] [stdout]      |                                                                                                   ^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this message is not used as a format string when given without arguments, but will be in a future Rust edition
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]      |
[INFO] [stdout] 1477 |                     _ => panic!("Expected poem to already be resolved, was some other work option {}", ...),
[INFO] [stdout]      |                                                                                                      ^^^^^
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]      |
[INFO] [stdout] 1477 |                     _ => panic!("{}", "Expected poem to already be resolved, was some other work option {}"),
[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 42.89s
[INFO] running `Command { std: "docker" "inspect" "d61bd0c1eb88a9b34a1b71a8f39c9a5bfb8b601de05b98cfe4ced9463dcb71b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d61bd0c1eb88a9b34a1b71a8f39c9a5bfb8b601de05b98cfe4ced9463dcb71b4", kill_on_drop: false }`
[INFO] [stdout] d61bd0c1eb88a9b34a1b71a8f39c9a5bfb8b601de05b98cfe4ced9463dcb71b4