[INFO] fetching crate fuzzcheck 0.6.0...
[INFO] checking fuzzcheck-0.6.0 against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] extracting crate fuzzcheck 0.6.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate fuzzcheck 0.6.0 on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "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-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 651ad285cda0e42f189ba648ece3b3f3dd8ebe9fb7ead838077c07fa7536a8b5
[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" "651ad285cda0e42f189ba648ece3b3f3dd8ebe9fb7ead838077c07fa7536a8b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "651ad285cda0e42f189ba648ece3b3f3dd8ebe9fb7ead838077c07fa7536a8b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "651ad285cda0e42f189ba648ece3b3f3dd8ebe9fb7ead838077c07fa7536a8b5", kill_on_drop: false }`
[INFO] [stdout] 651ad285cda0e42f189ba648ece3b3f3dd8ebe9fb7ead838077c07fa7536a8b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5c2453444a5ab17e5730449ea7fcb680b55e0c6966626f6c095a4a57408bf05
[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" "d5c2453444a5ab17e5730449ea7fcb680b55e0c6966626f6c095a4a57408bf05", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling fuzzcheck v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking fuzzcheck_traits v0.6.0
[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 panic!() 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 panic!() 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 panic!() 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 3.64s
[INFO] running `Command { std: "docker" "inspect" "d5c2453444a5ab17e5730449ea7fcb680b55e0c6966626f6c095a4a57408bf05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5c2453444a5ab17e5730449ea7fcb680b55e0c6966626f6c095a4a57408bf05", kill_on_drop: false }`
[INFO] [stdout] d5c2453444a5ab17e5730449ea7fcb680b55e0c6966626f6c095a4a57408bf05