[INFO] cloning repository https://github.com/phR0ze/loggers-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/phR0ze/loggers-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FphR0ze%2Floggers-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FphR0ze%2Floggers-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1c8ede1d7f4f16387835c0fd527db741e0fdb738
[INFO] checking phR0ze/loggers-rs against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FphR0ze%2Floggers-rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/phR0ze/loggers-rs on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/phR0ze/loggers-rs
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/phR0ze/loggers-rs
[INFO] tweaked toml for git repo https://github.com/phR0ze/loggers-rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/phR0ze/loggers-rs 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package
[INFO] [stderr]     Updating loggers-rs v0.0.3 (/workspace/builds/worker-2-tc1/source) -> v0.0.4
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.117
[INFO] [stderr]   Downloaded tracing-log v0.1.1
[INFO] [stderr]   Downloaded tracing-attributes v0.1.11
[INFO] [stderr]   Downloaded redox_users v0.3.5
[INFO] [stderr]   Downloaded tracing-core v0.1.17
[INFO] [stderr]   Downloaded const_fn v0.4.3
[INFO] [stderr]   Downloaded hermit-abi v0.1.17
[INFO] [stderr]   Downloaded rust-argon2 v0.8.3
[INFO] [stderr]   Downloaded blake2b_simd v0.5.11
[INFO] [stderr]   Downloaded cc v1.0.65
[INFO] [stderr]   Downloaded regex-automata v0.1.9
[INFO] [stderr]   Downloaded regex-syntax v0.6.21
[INFO] [stderr]   Downloaded regex v1.4.2
[INFO] [stderr]   Downloaded libc v0.2.80
[INFO] [stderr]   Downloaded syn v1.0.48
[INFO] [stderr]   Downloaded serde_json v1.0.59
[INFO] [stderr]   Downloaded loom v0.3.6
[INFO] [stderr]   Downloaded sharded-slab v0.1.0
[INFO] [stderr]   Downloaded smallvec v1.5.0
[INFO] [stderr]   Downloaded pin-project-lite v0.1.11
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.15
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.0
[INFO] [stderr]   Downloaded generator v0.6.23
[INFO] [stderr]   Downloaded tracing v0.1.21
[INFO] [stderr]   Downloaded serde_derive v1.0.117
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ab95a5e44026e6b2959bc3a8b570a7223f9df0e10846e3ceaea57048c4c4fb7
[INFO] running `Command { std: "docker" "start" "-a" "7ab95a5e44026e6b2959bc3a8b570a7223f9df0e10846e3ceaea57048c4c4fb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ab95a5e44026e6b2959bc3a8b570a7223f9df0e10846e3ceaea57048c4c4fb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ab95a5e44026e6b2959bc3a8b570a7223f9df0e10846e3ceaea57048c4c4fb7", kill_on_drop: false }`
[INFO] [stdout] 7ab95a5e44026e6b2959bc3a8b570a7223f9df0e10846e3ceaea57048c4c4fb7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 273223130d52e322ba0e08189b62e32a0e57120747348fb4da177bbf664609d9
[INFO] running `Command { std: "docker" "start" "-a" "273223130d52e322ba0e08189b62e32a0e57120747348fb4da177bbf664609d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking pin-project-lite v0.1.11
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking sharded-slab v0.1.0
[INFO] [stderr]     Checking smallvec v1.5.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking slog-term v2.6.0
[INFO] [stderr]    Compiling loggers-rs v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking slog-example v0.0.1 (/opt/rustwide/workdir/crates/slog-example)
[INFO] [stdout] warning: the item `log` is imported redundantly
[INFO] [stdout]  --> crates/slog-example/src/logfacade.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use log;
[INFO] [stdout]   |     ^^^ the item `log` 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 `log` is imported redundantly
[INFO] [stdout]  --> crates/slog-example/src/logfacade.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use log;
[INFO] [stdout]   |     ^^^ the item `log` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Drain` is imported redundantly
[INFO] [stdout]  --> crates/slog-example/examples/standard.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use slog::Drain;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 2 | use slog::*;
[INFO] [stdout]   |     ------- the item `Drain` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `slog_term` is imported redundantly
[INFO] [stdout]  --> crates/slog-example/examples/standard.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use slog_term;
[INFO] [stdout]   |     ^^^^^^^^^ the item `slog_term` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]     Checking tracing v0.1.21
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]     Checking tracing-example v0.0.1 (/opt/rustwide/workdir/crates/tracing-example)
[INFO] [stdout] warning: the item `log` is imported redundantly
[INFO] [stdout]  --> crates/tracing-example/src/logfacade.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use log;
[INFO] [stdout]   |     ^^^ the item `log` 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 `log` is imported redundantly
[INFO] [stdout]  --> crates/tracing-example/src/logfacade.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use log;
[INFO] [stdout]   |     ^^^ the item `log` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Drain` is imported redundantly
[INFO] [stdout]  --> crates/slog-example/examples/standard.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use slog::Drain;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 2 | use slog::*;
[INFO] [stdout]   |     ------- the item `Drain` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `slog_term` is imported redundantly
[INFO] [stdout]  --> crates/slog-example/examples/standard.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use slog_term;
[INFO] [stdout]   |     ^^^^^^^^^ the item `slog_term` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tracing_example` is imported redundantly
[INFO] [stdout]  --> crates/tracing-example/examples/standard.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tracing_example;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^ the item `tracing_example` 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 `tracing_subscriber` is imported redundantly
[INFO] [stdout]  --> crates/tracing-example/examples/standard.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tracing_subscriber;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ the item `tracing_subscriber` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tracing_example` is imported redundantly
[INFO] [stdout]  --> crates/tracing-example/examples/standard.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tracing_example;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^ the item `tracing_example` 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 `tracing_subscriber` is imported redundantly
[INFO] [stdout]  --> crates/tracing-example/examples/standard.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use tracing_subscriber;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^ the item `tracing_subscriber` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.61s
[INFO] running `Command { std: "docker" "inspect" "273223130d52e322ba0e08189b62e32a0e57120747348fb4da177bbf664609d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "273223130d52e322ba0e08189b62e32a0e57120747348fb4da177bbf664609d9", kill_on_drop: false }`
[INFO] [stdout] 273223130d52e322ba0e08189b62e32a0e57120747348fb4da177bbf664609d9