[INFO] fetching crate ethox 0.0.2...
[INFO] checking ethox-0.0.2 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate ethox 0.0.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ethox 0.0.2 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ethox 0.0.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ethox 0.0.2
[INFO] tweaked toml for crates.io crate ethox 0.0.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate ethox 0.0.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 99c853df8040f88958e5fb435e210830e7cb42b07804c799837480946d4f22e9
[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" "99c853df8040f88958e5fb435e210830e7cb42b07804c799837480946d4f22e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "99c853df8040f88958e5fb435e210830e7cb42b07804c799837480946d4f22e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99c853df8040f88958e5fb435e210830e7cb42b07804c799837480946d4f22e9", kill_on_drop: false }`
[INFO] [stdout] 99c853df8040f88958e5fb435e210830e7cb42b07804c799837480946d4f22e9
[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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 362436ffe21b4e351fa41e63eb32b5b8d968be23ead5c2b9d7072e7e5fcc6f83
[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" "362436ffe21b4e351fa41e63eb32b5b8d968be23ead5c2b9d7072e7e5fcc6f83", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking ethox v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/wire/./tcp.rs:1013:13
[INFO] [stdout]      |
[INFO] [stdout] 1013 |             (self.flags.syn() | self.flags.fin() | self.flags.rst())
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./ethernet.rs:8:1
[INFO] [stdout]    |
[INFO] [stdout] 8  | / enum_with_unknown! {
[INFO] [stdout] 9  | |     /// Ethernet protocol type.
[INFO] [stdout] 10 | |     pub enum EtherType(u16) {
[INFO] [stdout] 11 | |         Ipv4 = 0x0800,
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./ethernet.rs:8:1
[INFO] [stdout]    |
[INFO] [stdout] 8  | / enum_with_unknown! {
[INFO] [stdout] 9  | |     /// Ethernet protocol type.
[INFO] [stdout] 10 | |     pub enum EtherType(u16) {
[INFO] [stdout] 11 | |         Ipv4 = 0x0800,
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./arp.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | / enum_with_unknown! {
[INFO] [stdout] 12 | |     /// ARP hardware type.
[INFO] [stdout] 13 | |     pub enum Hardware(u16) {
[INFO] [stdout] 14 | |         Ethernet = 1
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./arp.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / enum_with_unknown! {
[INFO] [stdout] 19 | |     /// ARP operation type.
[INFO] [stdout] 20 | |     pub enum Operation(u16) {
[INFO] [stdout] 21 | |         Request = 1,
[INFO] [stdout] 22 | |         Reply = 2
[INFO] [stdout] 23 | |     }
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./ip.rs:57:1
[INFO] [stdout]    |
[INFO] [stdout] 57 | / enum_with_unknown! {
[INFO] [stdout] 58 | |     /// IP datagram encapsulated protocol.
[INFO] [stdout] 59 | |     pub enum Protocol(u8) {
[INFO] [stdout] 60 | |         HopByHop  = 0x00,
[INFO] [stdout] ...  |
[INFO] [stdout] 70 | |     }
[INFO] [stdout] 71 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./ipv6.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | / enum_with_unknown! {
[INFO] [stdout] 32 | |     /// IPv6 multicast scope.
[INFO] [stdout] 33 | |     pub enum Scope(u8) {
[INFO] [stdout] 34 | |         /// The address is valid for the interface alone.
[INFO] [stdout] ...  |
[INFO] [stdout] 48 | |     }
[INFO] [stdout] 49 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]    --> src/layer/ip/packet.rs:267:5
[INFO] [stdout]     |
[INFO] [stdout] 267 |     pub fn control(&self) -> &Controller<'a> {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:59:9
[INFO] [stdout]     |
[INFO] [stdout] 59  | #![warn(missing_docs)]
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::mem::replace` that must be used
[INFO] [stdout]    --> src/wire/payload.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |         core::mem::replace(self, inner);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/wire/./tcp.rs:1013:13
[INFO] [stdout]      |
[INFO] [stdout] 1013 |             (self.flags.syn() | self.flags.fin() | self.flags.rst())
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./ethernet.rs:8:1
[INFO] [stdout]    |
[INFO] [stdout] 8  | / enum_with_unknown! {
[INFO] [stdout] 9  | |     /// Ethernet protocol type.
[INFO] [stdout] 10 | |     pub enum EtherType(u16) {
[INFO] [stdout] 11 | |         Ipv4 = 0x0800,
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./ethernet.rs:8:1
[INFO] [stdout]    |
[INFO] [stdout] 8  | / enum_with_unknown! {
[INFO] [stdout] 9  | |     /// Ethernet protocol type.
[INFO] [stdout] 10 | |     pub enum EtherType(u16) {
[INFO] [stdout] 11 | |         Ipv4 = 0x0800,
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./arp.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | / enum_with_unknown! {
[INFO] [stdout] 12 | |     /// ARP hardware type.
[INFO] [stdout] 13 | |     pub enum Hardware(u16) {
[INFO] [stdout] 14 | |         Ethernet = 1
[INFO] [stdout] 15 | |     }
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./arp.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / enum_with_unknown! {
[INFO] [stdout] 19 | |     /// ARP operation type.
[INFO] [stdout] 20 | |     pub enum Operation(u16) {
[INFO] [stdout] 21 | |         Request = 1,
[INFO] [stdout] 22 | |         Reply = 2
[INFO] [stdout] 23 | |     }
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./ip.rs:57:1
[INFO] [stdout]    |
[INFO] [stdout] 57 | / enum_with_unknown! {
[INFO] [stdout] 58 | |     /// IP datagram encapsulated protocol.
[INFO] [stdout] 59 | |     pub enum Protocol(u8) {
[INFO] [stdout] 60 | |         HopByHop  = 0x00,
[INFO] [stdout] ...  |
[INFO] [stdout] 70 | |     }
[INFO] [stdout] 71 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `shown`
[INFO] [stdout]   --> src/macros.rs:32:42
[INFO] [stdout]    |
[INFO] [stdout] 32 |                   $($(#[$val_attr])* #[doc(shown)] $variant = $value ),+
[INFO] [stdout]    |                                            ^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/wire/./ipv6.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | / enum_with_unknown! {
[INFO] [stdout] 32 | |     /// IPv6 multicast scope.
[INFO] [stdout] 33 | |     pub enum Scope(u8) {
[INFO] [stdout] 34 | |         /// The address is valid for the interface alone.
[INFO] [stdout] ...  |
[INFO] [stdout] 48 | |     }
[INFO] [stdout] 49 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/wire/payload.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |         core::mem::replace(self, inner);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.94s
[INFO] running `Command { std: "docker" "inspect" "362436ffe21b4e351fa41e63eb32b5b8d968be23ead5c2b9d7072e7e5fcc6f83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "362436ffe21b4e351fa41e63eb32b5b8d968be23ead5c2b9d7072e7e5fcc6f83", kill_on_drop: false }`
[INFO] [stdout] 362436ffe21b4e351fa41e63eb32b5b8d968be23ead5c2b9d7072e7e5fcc6f83