[INFO] fetching crate tm1637-gpio-driver 2.0.4...
[INFO] checking tm1637-gpio-driver-2.0.4 against master#f82664191d0e8764b7435b9d72eb0e366b8b1464 for pr-83354
[INFO] extracting crate tm1637-gpio-driver 2.0.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate tm1637-gpio-driver 2.0.4 on toolchain f82664191d0e8764b7435b9d72eb0e366b8b1464
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tm1637-gpio-driver 2.0.4
[INFO] finished tweaking crates.io crate tm1637-gpio-driver 2.0.4
[INFO] tweaked toml for crates.io crate tm1637-gpio-driver 2.0.4 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e24be7a0da2a331cd3dff3d5859dc2b65efec85e2ca1a2bfb7d6f2b358ca265
[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" "4e24be7a0da2a331cd3dff3d5859dc2b65efec85e2ca1a2bfb7d6f2b358ca265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e24be7a0da2a331cd3dff3d5859dc2b65efec85e2ca1a2bfb7d6f2b358ca265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e24be7a0da2a331cd3dff3d5859dc2b65efec85e2ca1a2bfb7d6f2b358ca265", kill_on_drop: false }`
[INFO] [stdout] 4e24be7a0da2a331cd3dff3d5859dc2b65efec85e2ca1a2bfb7d6f2b358ca265
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f82664191d0e8764b7435b9d72eb0e366b8b1464" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0b00f68e3d38cd172c6bfce97072f7634e8cd629b4d6ea76e99e9ee7c071f8d
[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" "e0b00f68e3d38cd172c6bfce97072f7634e8cd629b4d6ea76e99e9ee7c071f8d", kill_on_drop: false }`
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking gpio-cdev v0.3.0
[INFO] [stderr]     Checking tm1637-gpio-driver v2.0.4 (/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: 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: 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: 1 warning emitted
[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: 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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.16s
[INFO] running `Command { std: "docker" "inspect" "e0b00f68e3d38cd172c6bfce97072f7634e8cd629b4d6ea76e99e9ee7c071f8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0b00f68e3d38cd172c6bfce97072f7634e8cd629b4d6ea76e99e9ee7c071f8d", kill_on_drop: false }`
[INFO] [stdout] e0b00f68e3d38cd172c6bfce97072f7634e8cd629b4d6ea76e99e9ee7c071f8d