[INFO] cloning repository https://github.com/freifunk-luebeck/fastd-exporter-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/freifunk-luebeck/fastd-exporter-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffreifunk-luebeck%2Ffastd-exporter-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffreifunk-luebeck%2Ffastd-exporter-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cb5c43042e1dac97b990e5b4960b47cebae04635
[INFO] checking freifunk-luebeck/fastd-exporter-rust against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffreifunk-luebeck%2Ffastd-exporter-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/freifunk-luebeck/fastd-exporter-rust on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/freifunk-luebeck/fastd-exporter-rust
[INFO] finished tweaking git repo https://github.com/freifunk-luebeck/fastd-exporter-rust
[INFO] tweaked toml for git repo https://github.com/freifunk-luebeck/fastd-exporter-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/freifunk-luebeck/fastd-exporter-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tiny_http v0.8.2
[INFO] [stderr]   Downloaded protobuf v2.8.0
[INFO] [stderr]   Downloaded pretty_env_logger v0.3.1
[INFO] [stderr]   Downloaded prometheus v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 078ecc1eb6570102bdb07bafc4f637dc256a06e4d59deb2de5d7f0c6fcf94096
[INFO] running `Command { std: "docker" "start" "-a" "078ecc1eb6570102bdb07bafc4f637dc256a06e4d59deb2de5d7f0c6fcf94096", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "078ecc1eb6570102bdb07bafc4f637dc256a06e4d59deb2de5d7f0c6fcf94096", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "078ecc1eb6570102bdb07bafc4f637dc256a06e4d59deb2de5d7f0c6fcf94096", kill_on_drop: false }`
[INFO] [stdout] 078ecc1eb6570102bdb07bafc4f637dc256a06e4d59deb2de5d7f0c6fcf94096
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2331311b00c96cacfa6e71c44f966ef5dd5032177633b45832123dbeb8b64eb6
[INFO] running `Command { std: "docker" "start" "-a" "2331311b00c96cacfa6e71c44f966ef5dd5032177633b45832123dbeb8b64eb6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking smallvec v1.5.0
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling protobuf v2.8.0
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]     Checking unicode-bidi v0.3.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking humantime v1.2.0
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling prometheus v0.10.0
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking ascii v1.0.0
[INFO] [stderr]     Checking chunked_transfer v1.4.0
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking chrono v0.4.7
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking pretty_env_logger v0.3.1
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking tiny_http v0.8.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking prometheus-fastd-exporter v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use clap;
[INFO] [stdout]   |     ^^^^ the item `clap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `pretty_env_logger` is imported redundantly
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use pretty_env_logger;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ the item `pretty_env_logger` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Box` is imported redundantly
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::boxed::Box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Box` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Clone` is imported redundantly
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::clone::Clone;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Clone` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tiny_http` is imported redundantly
[INFO] [stdout]   --> src/main.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 | use tiny_http::{self, Method, Response, Server};
[INFO] [stdout]    |                 ^^^^ the item `tiny_http` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DirEntry`
[INFO] [stdout]   --> src/main.rs:19:21
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::fs::{self, DirEntry};
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use std::collections::HashSet;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IntoIterator` is imported redundantly
[INFO] [stdout]  --> src/fastd.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::iter::IntoIterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `IntoIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use clap;
[INFO] [stdout]   |     ^^^^ the item `clap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `pretty_env_logger` is imported redundantly
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use pretty_env_logger;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ the item `pretty_env_logger` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Box` is imported redundantly
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::boxed::Box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Box` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Clone` is imported redundantly
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::clone::Clone;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Clone` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tiny_http` is imported redundantly
[INFO] [stdout]   --> src/main.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 | use tiny_http::{self, Method, Response, Server};
[INFO] [stdout]    |                 ^^^^ the item `tiny_http` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DirEntry`
[INFO] [stdout]   --> src/main.rs:19:21
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::fs::{self, DirEntry};
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use std::collections::HashSet;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IntoIterator` is imported redundantly
[INFO] [stdout]  --> src/fastd.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::iter::IntoIterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `IntoIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 21.35s
[INFO] running `Command { std: "docker" "inspect" "2331311b00c96cacfa6e71c44f966ef5dd5032177633b45832123dbeb8b64eb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2331311b00c96cacfa6e71c44f966ef5dd5032177633b45832123dbeb8b64eb6", kill_on_drop: false }`
[INFO] [stdout] 2331311b00c96cacfa6e71c44f966ef5dd5032177633b45832123dbeb8b64eb6