[INFO] fetching crate tm1637-gpio-driver 2.0.5...
[INFO] checking tm1637-gpio-driver-2.0.5 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate tm1637-gpio-driver 2.0.5 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate tm1637-gpio-driver 2.0.5 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tm1637-gpio-driver 2.0.5
[INFO] finished tweaking crates.io crate tm1637-gpio-driver 2.0.5
[INFO] tweaked toml for crates.io crate tm1637-gpio-driver 2.0.5 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 46888ce841ffecb84675975964f0684eb4d81c63ba5025ef5b6d5a2bd3129191
[INFO] running `Command { std: "docker" "start" "-a" "46888ce841ffecb84675975964f0684eb4d81c63ba5025ef5b6d5a2bd3129191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46888ce841ffecb84675975964f0684eb4d81c63ba5025ef5b6d5a2bd3129191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46888ce841ffecb84675975964f0684eb4d81c63ba5025ef5b6d5a2bd3129191", kill_on_drop: false }`
[INFO] [stdout] 46888ce841ffecb84675975964f0684eb4d81c63ba5025ef5b6d5a2bd3129191
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba87b54d32de93a9f41d42fd22a34b54e35b88ff08280c857a8065f8c306d2c9
[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" "ba87b54d32de93a9f41d42fd22a34b54e35b88ff08280c857a8065f8c306d2c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]     Checking gpio-cdev v0.4.0
[INFO] [stderr]     Checking tm1637-gpio-driver v2.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::*`
[INFO] [stdout]   --> src/gpio_api/dummy/mod.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     use crate::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/gpio_api/dummy/mod.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut f = setup_dummy();
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/gpio_api/gpio_cdev/mod.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 26 |             panic!(&format!("Pin {} is already used in kernel!", pin_num))
[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] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 26 |             panic!("{}", &format!("Pin {} is already used in kernel!", pin_num))
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/gpio_api/dummy/mod.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut f = setup_dummy();
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/gpio_api/gpio_cdev/mod.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 26 |             panic!(&format!("Pin {} is already used in kernel!", pin_num))
[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] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 26 |             panic!("{}", &format!("Pin {} is already used in kernel!", pin_num))
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.60s
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ba87b54d32de93a9f41d42fd22a34b54e35b88ff08280c857a8065f8c306d2c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba87b54d32de93a9f41d42fd22a34b54e35b88ff08280c857a8065f8c306d2c9", kill_on_drop: false }`
[INFO] [stdout] ba87b54d32de93a9f41d42fd22a34b54e35b88ff08280c857a8065f8c306d2c9