[INFO] cloning repository https://github.com/caiomcg/sentinel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caiomcg/sentinel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaiomcg%2Fsentinel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaiomcg%2Fsentinel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6dc448ce06f8d59342d5d00fce2e853521740055
[INFO] testing caiomcg/sentinel against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaiomcg%2Fsentinel" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/caiomcg/sentinel on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/caiomcg/sentinel
[INFO] finished tweaking git repo https://github.com/caiomcg/sentinel
[INFO] tweaked toml for git repo https://github.com/caiomcg/sentinel written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/caiomcg/sentinel already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pnet_transport v0.28.0
[INFO] [stderr]   Downloaded pnet_base v0.28.0
[INFO] [stderr]   Downloaded pnet_sys v0.28.0
[INFO] [stderr]   Downloaded pnet v0.28.0
[INFO] [stderr]   Downloaded pnet_macros_support v0.28.0
[INFO] [stderr]   Downloaded pnet_packet v0.28.0
[INFO] [stderr]   Downloaded pnet_datalink v0.28.0
[INFO] [stderr]   Downloaded pnet_macros v0.28.0
[INFO] [stderr]   Downloaded ipnetwork v0.18.0
[INFO] [stderr]   Downloaded tui v0.15.0
[INFO] [stderr]   Downloaded dns-lookup v1.0.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] 8cd9aff3773910fc6687e6432e8979b71f6649d3bb60cf8d660c01d75a8ffe7c
[INFO] running `Command { std: "docker" "start" "-a" "8cd9aff3773910fc6687e6432e8979b71f6649d3bb60cf8d660c01d75a8ffe7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8cd9aff3773910fc6687e6432e8979b71f6649d3bb60cf8d660c01d75a8ffe7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cd9aff3773910fc6687e6432e8979b71f6649d3bb60cf8d660c01d75a8ffe7c", kill_on_drop: false }`
[INFO] [stdout] 8cd9aff3773910fc6687e6432e8979b71f6649d3bb60cf8d660c01d75a8ffe7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77bc9af57c576b793e3dcc8693e3de13dd793b58fd83e0815637191d1e24a868
[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" "77bc9af57c576b793e3dcc8693e3de13dd793b58fd83e0815637191d1e24a868", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling pnet_base v0.28.0
[INFO] [stderr]    Compiling pnet v0.28.0
[INFO] [stderr]    Compiling ipnetwork v0.18.0
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling pnet_macros_support v0.28.0
[INFO] [stderr]    Compiling pnet_sys v0.28.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling socket2 v0.4.0
[INFO] [stderr]    Compiling termion v1.5.6
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling pnet_datalink v0.28.0
[INFO] [stderr]    Compiling dns-lookup v1.0.7
[INFO] [stderr]    Compiling tui v0.15.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling pnet_macros v0.28.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling structopt v0.3.21
[INFO] [stderr]    Compiling pnet_packet v0.28.0
[INFO] [stderr]    Compiling pnet_transport v0.28.0
[INFO] [stderr]    Compiling sentinel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/config.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `EtherType`
[INFO] [stdout]  --> src/sniffer/mod.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use pnet::packet::ethernet::{EtherType, EthernetPacket };
[INFO] [stdout]   |                              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `pnet::packet::ipv4::Ipv4Packet`
[INFO] [stdout]  --> src/sniffer/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use pnet::packet::ipv4::Ipv4Packet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `pnet::packet::Packet`
[INFO] [stdout]  --> src/sniffer/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use pnet::packet::Packet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Protocol`
[INFO] [stdout]   --> src/sniffer/sniffer_handler.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Protocol(IpNextHeaderProtocol, Box<dyn ProtocolHandler>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_protocol`
[INFO] [stdout]   --> src/sniffer/sniffer_handler.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn handle_protocol(&self, packet_type: EtherType) -> Option<&Box<dyn PacketHandler>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/sniffer/mod.rs:29:62
[INFO] [stdout]    |
[INFO] [stdout] 29 |             Ok(_) => panic!("sniffer: unhandled channel type {}"),
[INFO] [stdout]    |                                                              ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 29 |             Ok(_) => panic!("sniffer: unhandled channel type {}", ...),
[INFO] [stdout]    |                                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 29 |             Ok(_) => panic!("{}", "sniffer: unhandled channel type {}"),
[INFO] [stdout]    |                             +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.69s
[INFO] running `Command { std: "docker" "inspect" "77bc9af57c576b793e3dcc8693e3de13dd793b58fd83e0815637191d1e24a868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77bc9af57c576b793e3dcc8693e3de13dd793b58fd83e0815637191d1e24a868", kill_on_drop: false }`
[INFO] [stdout] 77bc9af57c576b793e3dcc8693e3de13dd793b58fd83e0815637191d1e24a868
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", 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] 55c4c3f9d6bbbcfa5aea916bf0abe55629ce33f42e219978c11e82bd12eb24ae
[INFO] running `Command { std: "docker" "start" "-a" "55c4c3f9d6bbbcfa5aea916bf0abe55629ce33f42e219978c11e82bd12eb24ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling sentinel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/config.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `EtherType`
[INFO] [stdout]  --> src/sniffer/mod.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use pnet::packet::ethernet::{EtherType, EthernetPacket };
[INFO] [stdout]   |                              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `pnet::packet::ipv4::Ipv4Packet`
[INFO] [stdout]  --> src/sniffer/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use pnet::packet::ipv4::Ipv4Packet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `pnet::packet::Packet`
[INFO] [stdout]  --> src/sniffer/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use pnet::packet::Packet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Protocol`
[INFO] [stdout]   --> src/sniffer/sniffer_handler.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Protocol(IpNextHeaderProtocol, Box<dyn ProtocolHandler>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_protocol`
[INFO] [stdout]   --> src/sniffer/sniffer_handler.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn handle_protocol(&self, packet_type: EtherType) -> Option<&Box<dyn PacketHandler>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/sniffer/mod.rs:29:62
[INFO] [stdout]    |
[INFO] [stdout] 29 |             Ok(_) => panic!("sniffer: unhandled channel type {}"),
[INFO] [stdout]    |                                                              ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 29 |             Ok(_) => panic!("sniffer: unhandled channel type {}", ...),
[INFO] [stdout]    |                                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 29 |             Ok(_) => panic!("{}", "sniffer: unhandled channel type {}"),
[INFO] [stdout]    |                             +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `Command { std: "docker" "inspect" "55c4c3f9d6bbbcfa5aea916bf0abe55629ce33f42e219978c11e82bd12eb24ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55c4c3f9d6bbbcfa5aea916bf0abe55629ce33f42e219978c11e82bd12eb24ae", kill_on_drop: false }`
[INFO] [stdout] 55c4c3f9d6bbbcfa5aea916bf0abe55629ce33f42e219978c11e82bd12eb24ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", 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] 5ffa33018dd53ebf6f5501c4cf1ff32257ee4b48c307aa8be9f7c7936d308e93
[INFO] running `Command { std: "docker" "start" "-a" "5ffa33018dd53ebf6f5501c4cf1ff32257ee4b48c307aa8be9f7c7936d308e93", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::path::PathBuf`
[INFO] [stdout] 
[INFO] [stderr]  --> src/config.rs:2:5
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 2 | use std::path::PathBuf;
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `EtherType`
[INFO] [stderr]  --> src/sniffer/mod.rs:6:30
[INFO] [stderr]   |
[INFO] [stderr] 6 | use pnet::packet::ethernet::{EtherType, EthernetPacket };
[INFO] [stderr]   |                              ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `pnet::packet::ipv4::Ipv4Packet`
[INFO] [stderr]  --> src/sniffer/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use pnet::packet::ipv4::Ipv4Packet;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `pnet::packet::Packet`
[INFO] [stderr]  --> src/sniffer/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use pnet::packet::Packet;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Protocol`
[INFO] [stderr]   --> src/sniffer/sniffer_handler.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Protocol(IpNextHeaderProtocol, Box<dyn ProtocolHandler>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `handle_protocol`
[INFO] [stderr]   --> src/sniffer/sniffer_handler.rs:49:12
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn handle_protocol(&self, packet_type: EtherType) -> Option<&Box<dyn PacketHandler>> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message contains an unused formatting placeholder
[INFO] [stderr]   --> src/sniffer/mod.rs:29:62
[INFO] [stderr]    |
[INFO] [stderr] 29 |             Ok(_) => panic!("sniffer: unhandled channel type {}"),
[INFO] [stderr]    |                                                              ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stderr] help: add the missing argument
[INFO] [stderr]    |
[INFO] [stderr] 29 |             Ok(_) => panic!("sniffer: unhandled channel type {}", ...),
[INFO] [stderr]    |                                                                 +++++
[INFO] [stderr] help: or add a "{}" format string to use the message literally
[INFO] [stderr]    |
[INFO] [stderr] 29 |             Ok(_) => panic!("{}", "sniffer: unhandled channel type {}"),
[INFO] [stderr]    |                             +++++
[INFO] [stderr] 
[INFO] [stderr] warning: `sentinel` (bin "sentinel" test) generated 7 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sentinel-bdbc3af26cabec3e)
[INFO] running `Command { std: "docker" "inspect" "5ffa33018dd53ebf6f5501c4cf1ff32257ee4b48c307aa8be9f7c7936d308e93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ffa33018dd53ebf6f5501c4cf1ff32257ee4b48c307aa8be9f7c7936d308e93", kill_on_drop: false }`
[INFO] [stdout] 5ffa33018dd53ebf6f5501c4cf1ff32257ee4b48c307aa8be9f7c7936d308e93