[INFO] fetching crate fuzzcheck 0.6.0...
[INFO] checking fuzzcheck-0.6.0 against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] extracting crate fuzzcheck 0.6.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate fuzzcheck 0.6.0 on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fuzzcheck 0.6.0
[INFO] finished tweaking crates.io crate fuzzcheck 0.6.0
[INFO] tweaked toml for crates.io crate fuzzcheck 0.6.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 487d597088e366a17b03f0976f5a6acf394489f4ed98d28e8bab1caa24e8f7af
[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" "487d597088e366a17b03f0976f5a6acf394489f4ed98d28e8bab1caa24e8f7af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "487d597088e366a17b03f0976f5a6acf394489f4ed98d28e8bab1caa24e8f7af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "487d597088e366a17b03f0976f5a6acf394489f4ed98d28e8bab1caa24e8f7af", kill_on_drop: false }`
[INFO] [stdout] 487d597088e366a17b03f0976f5a6acf394489f4ed98d28e8bab1caa24e8f7af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--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] 6d7a658db8cc55eab14accd3855a98094c33387ed0a38be1a2630b17c41d7cf0
[INFO] running `Command { std: "docker" "start" "-a" "6d7a658db8cc55eab14accd3855a98094c33387ed0a38be1a2630b17c41d7cf0", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling fuzzcheck v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking fuzzcheck_traits v0.6.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking fuzzcheck_common v0.6.0
[INFO] [stdout] warning: constant is never used: `EWOULDBLOCK`
[INFO] [stdout]    --> src/nix_subset/errno.rs:816:5
[INFO] [stdout]     |
[INFO] [stdout] 816 |     pub const EWOULDBLOCK: Errno = Errno::EAGAIN;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EDEADLOCK`
[INFO] [stdout]    --> src/nix_subset/errno.rs:817:5
[INFO] [stdout]     |
[INFO] [stdout] 817 |     pub const EDEADLOCK: Errno = Errno::EDEADLK;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ENOTSUP`
[INFO] [stdout]    --> src/nix_subset/errno.rs:818:5
[INFO] [stdout]     |
[INFO] [stdout] 818 |     pub const ENOTSUP: Errno = Errno::EOPNOTSUPP;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `type_of_thread_id`
[INFO] [stdout]    --> src/nix_subset/signal.rs:423:1
[INFO] [stdout]     |
[INFO] [stdout] 423 | pub type type_of_thread_id = libc::pid_t;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EWOULDBLOCK`
[INFO] [stdout]    --> src/nix_subset/errno.rs:816:5
[INFO] [stdout]     |
[INFO] [stdout] 816 |     pub const EWOULDBLOCK: Errno = Errno::EAGAIN;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EDEADLOCK`
[INFO] [stdout]    --> src/nix_subset/errno.rs:817:5
[INFO] [stdout]     |
[INFO] [stdout] 817 |     pub const EDEADLOCK: Errno = Errno::EDEADLK;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ENOTSUP`
[INFO] [stdout]    --> src/nix_subset/errno.rs:818:5
[INFO] [stdout]     |
[INFO] [stdout] 818 |     pub const ENOTSUP: Errno = Errno::EOPNOTSUPP;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `type_of_thread_id`
[INFO] [stdout]    --> src/nix_subset/signal.rs:423:1
[INFO] [stdout]     |
[INFO] [stdout] 423 | pub type type_of_thread_id = libc::pid_t;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/pool.rs:919:17
[INFO] [stdout]     |
[INFO] [stdout] 919 |                 format!("{:.2} != {:.2}", input.score, expected_input_score)
[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]     = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 919 |                 "{:.2} != {:.2}", input.score, expected_input_score
[INFO] [stdout]     |                --                                                 --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]     --> src/pool.rs:1158:21
[INFO] [stdout]      |
[INFO] [stdout] 1158 |                     format!("{:.3} > {:.3}", prev_score, pool.score())
[INFO] [stdout]      |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this is no longer accepted in Rust 2021
[INFO] [stdout]      = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]      |
[INFO] [stdout] 1158 |                     "{:.3} > {:.3}", prev_score, pool.score()
[INFO] [stdout]      |                    --                                       --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]     --> src/pool.rs:1167:21
[INFO] [stdout]      |
[INFO] [stdout] 1167 |                     format!("{:.3} < {:.3}", prev_score, pool.score())
[INFO] [stdout]      |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this is no longer accepted in Rust 2021
[INFO] [stdout]      = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]      |
[INFO] [stdout] 1167 |                     "{:.3} < {:.3}", prev_score, pool.score()
[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 2.49s
[INFO] running `Command { std: "docker" "inspect" "6d7a658db8cc55eab14accd3855a98094c33387ed0a38be1a2630b17c41d7cf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d7a658db8cc55eab14accd3855a98094c33387ed0a38be1a2630b17c41d7cf0", kill_on_drop: false }`
[INFO] [stdout] 6d7a658db8cc55eab14accd3855a98094c33387ed0a38be1a2630b17c41d7cf0