[INFO] fetching crate acyclic-network 0.2.0...
[INFO] checking acyclic-network-0.2.0 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate acyclic-network 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate acyclic-network 0.2.0 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate acyclic-network 0.2.0
[INFO] finished tweaking crates.io crate acyclic-network 0.2.0
[INFO] tweaked toml for crates.io crate acyclic-network 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding fixedbitset v0.1.9 (latest: v0.5.7)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fixedbitset v0.1.9
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94bc9b65a693de9ea77f2b7bb9465484c445f61c99a0b851e2b2c8920125f1a9
[INFO] running `Command { std: "docker" "start" "-a" "94bc9b65a693de9ea77f2b7bb9465484c445f61c99a0b851e2b2c8920125f1a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94bc9b65a693de9ea77f2b7bb9465484c445f61c99a0b851e2b2c8920125f1a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94bc9b65a693de9ea77f2b7bb9465484c445f61c99a0b851e2b2c8920125f1a9", kill_on_drop: false }`
[INFO] [stdout] 94bc9b65a693de9ea77f2b7bb9465484c445f61c99a0b851e2b2c8920125f1a9
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 475f7f862e55172cdd4d775b3fdc8f009b74583d738c64b35f219a8a16c2721a
[INFO] running `Command { std: "docker" "start" "-a" "475f7f862e55172cdd4d775b3fdc8f009b74583d738c64b35f219a8a16c2721a", kill_on_drop: false }`
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking acyclic-network v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |     type Item = (LinkRefItem<'a, N, L, EXTID>);
[INFO] [stdout]     |                 ^                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 184 -     type Item = (LinkRefItem<'a, N, L, EXTID>);
[INFO] [stdout] 184 +     type Item = LinkRefItem<'a, N, L, EXTID>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |     type Item = (LinkRefItem<'a, N, L, EXTID>);
[INFO] [stdout]     |                 ^                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 184 -     type Item = (LinkRefItem<'a, N, L, EXTID>);
[INFO] [stdout] 184 +     type Item = LinkRefItem<'a, N, L, EXTID>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:859:20
[INFO] [stdout]     |
[INFO] [stdout] 859 |             panic!(err);
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 859 |             panic!("{}", err);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:892:20
[INFO] [stdout]     |
[INFO] [stdout] 892 |             panic!(err);
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 892 |             panic!("{}", err);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:859:20
[INFO] [stdout]     |
[INFO] [stdout] 859 |             panic!(err);
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 859 |             panic!("{}", err);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:892:20
[INFO] [stdout]     |
[INFO] [stdout] 892 |             panic!(err);
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 892 |             panic!("{}", err);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]     --> src/lib.rs:1529:9
[INFO] [stdout]      |
[INFO] [stdout] 1529 |         drop(i1);
[INFO] [stdout]      |         ^^^^^--^
[INFO] [stdout]      |              |
[INFO] [stdout]      |              argument has type `NodeIndex`
[INFO] [stdout]      |
[INFO] [stdout]      = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]      = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]     --> src/lib.rs:1543:9
[INFO] [stdout]      |
[INFO] [stdout] 1543 |         drop(h2);
[INFO] [stdout]      |         ^^^^^--^
[INFO] [stdout]      |              |
[INFO] [stdout]      |              argument has type `NodeIndex`
[INFO] [stdout]      |
[INFO] [stdout]      = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]     --> src/lib.rs:1555:9
[INFO] [stdout]      |
[INFO] [stdout] 1555 |         drop(o1);
[INFO] [stdout]      |         ^^^^^--^
[INFO] [stdout]      |              |
[INFO] [stdout]      |              argument has type `NodeIndex`
[INFO] [stdout]      |
[INFO] [stdout]      = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "475f7f862e55172cdd4d775b3fdc8f009b74583d738c64b35f219a8a16c2721a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "475f7f862e55172cdd4d775b3fdc8f009b74583d738c64b35f219a8a16c2721a", kill_on_drop: false }`
[INFO] [stdout] 475f7f862e55172cdd4d775b3fdc8f009b74583d738c64b35f219a8a16c2721a
[INFO] checking acyclic-network-0.2.0 against try#9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88 for pr-124157
[INFO] extracting crate acyclic-network 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate acyclic-network 0.2.0 on toolchain 9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate acyclic-network 0.2.0
[INFO] finished tweaking crates.io crate acyclic-network 0.2.0
[INFO] tweaked toml for crates.io crate acyclic-network 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding fixedbitset v0.1.9 (latest: v0.5.7)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8216181e0f36a0f2d1602a0be9fee0cba720628bd4c80c4c7806106b7af642d
[INFO] running `Command { std: "docker" "start" "-a" "d8216181e0f36a0f2d1602a0be9fee0cba720628bd4c80c4c7806106b7af642d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8216181e0f36a0f2d1602a0be9fee0cba720628bd4c80c4c7806106b7af642d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8216181e0f36a0f2d1602a0be9fee0cba720628bd4c80c4c7806106b7af642d", kill_on_drop: false }`
[INFO] [stdout] d8216181e0f36a0f2d1602a0be9fee0cba720628bd4c80c4c7806106b7af642d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d12b1259b24df2eb43afad4cd7122fdedde7fb4310e05f37c621cfe75f35759
[INFO] running `Command { std: "docker" "start" "-a" "6d12b1259b24df2eb43afad4cd7122fdedde7fb4310e05f37c621cfe75f35759", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking acyclic-network v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |     type Item = (LinkRefItem<'a, N, L, EXTID>);
[INFO] [stdout]     |                 ^                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 184 -     type Item = (LinkRefItem<'a, N, L, EXTID>);
[INFO] [stdout] 184 +     type Item = LinkRefItem<'a, N, L, EXTID>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |     type Item = (LinkRefItem<'a, N, L, EXTID>);
[INFO] [stdout]     |                 ^                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 184 -     type Item = (LinkRefItem<'a, N, L, EXTID>);
[INFO] [stdout] 184 +     type Item = LinkRefItem<'a, N, L, EXTID>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:859:20
[INFO] [stdout]     |
[INFO] [stdout] 859 |             panic!(err);
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 859 |             panic!("{}", err);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:892:20
[INFO] [stdout]     |
[INFO] [stdout] 892 |             panic!(err);
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 892 |             panic!("{}", err);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:859:20
[INFO] [stdout]     |
[INFO] [stdout] 859 |             panic!(err);
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 859 |             panic!("{}", err);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:892:20
[INFO] [stdout]     |
[INFO] [stdout] 892 |             panic!(err);
[INFO] [stdout]     |                    ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 892 |             panic!("{}", err);
[INFO] [stdout]     |                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]     --> src/lib.rs:1529:9
[INFO] [stdout]      |
[INFO] [stdout] 1529 |         drop(i1);
[INFO] [stdout]      |         ^^^^^--^
[INFO] [stdout]      |              |
[INFO] [stdout]      |              argument has type `NodeIndex`
[INFO] [stdout]      |
[INFO] [stdout]      = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]      = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]     --> src/lib.rs:1543:9
[INFO] [stdout]      |
[INFO] [stdout] 1543 |         drop(h2);
[INFO] [stdout]      |         ^^^^^--^
[INFO] [stdout]      |              |
[INFO] [stdout]      |              argument has type `NodeIndex`
[INFO] [stdout]      |
[INFO] [stdout]      = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]     --> src/lib.rs:1555:9
[INFO] [stdout]      |
[INFO] [stdout] 1555 |         drop(o1);
[INFO] [stdout]      |         ^^^^^--^
[INFO] [stdout]      |              |
[INFO] [stdout]      |              argument has type `NodeIndex`
[INFO] [stdout]      |
[INFO] [stdout]      = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "6d12b1259b24df2eb43afad4cd7122fdedde7fb4310e05f37c621cfe75f35759", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d12b1259b24df2eb43afad4cd7122fdedde7fb4310e05f37c621cfe75f35759", kill_on_drop: false }`
[INFO] [stdout] 6d12b1259b24df2eb43afad4cd7122fdedde7fb4310e05f37c621cfe75f35759
