[INFO] fetching crate skipchannel 2.0.1...
[INFO] checking skipchannel-2.0.1 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate skipchannel 2.0.1 into /workspace/builds/worker-41/source
[INFO] validating manifest of crates.io crate skipchannel 2.0.1 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate skipchannel 2.0.1
[INFO] finished tweaking crates.io crate skipchannel 2.0.1
[INFO] tweaked toml for crates.io crate skipchannel 2.0.1 written to /workspace/builds/worker-41/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/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" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67ebfaeb6c7dbb8523ea9b286c4c74119fee0c39a13832fc6e0b58bf90b323c0
[INFO] running `Command { std: "docker" "start" "-a" "67ebfaeb6c7dbb8523ea9b286c4c74119fee0c39a13832fc6e0b58bf90b323c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67ebfaeb6c7dbb8523ea9b286c4c74119fee0c39a13832fc6e0b58bf90b323c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67ebfaeb6c7dbb8523ea9b286c4c74119fee0c39a13832fc6e0b58bf90b323c0", kill_on_drop: false }`
[INFO] [stdout] 67ebfaeb6c7dbb8523ea9b286c4c74119fee0c39a13832fc6e0b58bf90b323c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c25cc51d30bafc62963547e55ab60be68a33b76665bc1af0ea88d828a067bae
[INFO] running `Command { std: "docker" "start" "-a" "1c25cc51d30bafc62963547e55ab60be68a33b76665bc1af0ea88d828a067bae", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking skipchannel v2.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:105:36
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 Err(err) => panic!(err),
[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] help: add a "{:?}" format string to use the Debug implementation of `Box<dyn Any + Send>`
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 Err(err) => panic!("{:?}", err),
[INFO] [stdout]     |                                    +++++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 Err(err) => std::panic::panic_any(err),
[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 0.53s
[INFO] running `Command { std: "docker" "inspect" "1c25cc51d30bafc62963547e55ab60be68a33b76665bc1af0ea88d828a067bae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c25cc51d30bafc62963547e55ab60be68a33b76665bc1af0ea88d828a067bae", kill_on_drop: false }`
[INFO] [stdout] 1c25cc51d30bafc62963547e55ab60be68a33b76665bc1af0ea88d828a067bae