[INFO] fetching crate helgoboss-midi 0.2.0...
[INFO] checking helgoboss-midi-0.2.0 against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] extracting crate helgoboss-midi 0.2.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate helgoboss-midi 0.2.0 on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate helgoboss-midi 0.2.0
[INFO] finished tweaking crates.io crate helgoboss-midi 0.2.0
[INFO] tweaked toml for crates.io crate helgoboss-midi 0.2.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce1b2e966fe31876c75fd53d18a83b683901b2fa8335fa030cf9a9caf4080d88
[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" "ce1b2e966fe31876c75fd53d18a83b683901b2fa8335fa030cf9a9caf4080d88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce1b2e966fe31876c75fd53d18a83b683901b2fa8335fa030cf9a9caf4080d88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce1b2e966fe31876c75fd53d18a83b683901b2fa8335fa030cf9a9caf4080d88", kill_on_drop: false }`
[INFO] [stdout] ce1b2e966fe31876c75fd53d18a83b683901b2fa8335fa030cf9a9caf4080d88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "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] ec9b54463683a58054a009b93c6946212c5e1a9e0d36d7dc6377c8f962a3b48a
[INFO] running `Command { std: "docker" "start" "-a" "ec9b54463683a58054a009b93c6946212c5e1a9e0d36d7dc6377c8f962a3b48a", kill_on_drop: false }`
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling core-error v0.0.0
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking pulldown-cmark v0.8.0
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking syn v1.0.64
[INFO] [stderr]     Checking version-sync v0.9.2
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling num_enum_derive v0.5.1
[INFO] [stderr]    Compiling derive_more v0.99.13
[INFO] [stderr]     Checking num_enum v0.5.1
[INFO] [stderr]     Checking helgoboss-midi v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/channel_mod.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / newtype! {
[INFO] [stdout] 4  | |     #[doc = r"A MIDI channel (0 - 15)."]
[INFO] [stdout] 5  | |     name = Channel, repr = u8, max = 15
[INFO] [stdout] 6  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/key_number_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A key number (0 - 127), e.g. of a MIDI Note On message."]
[INFO] [stdout] 4  | |     name = KeyNumber, repr = u8, max = 127
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/controller_number_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A controller number (0 - 127) of a MIDI Control Change message."]
[INFO] [stdout] 4  | |     name = ControllerNumber, repr = u8, max = 127
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/u4_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A 4-bit integer (0 - 15)."]
[INFO] [stdout] 4  | |     name = U4, repr = u8, max = 15
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/u7_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A 7-bit integer (0 - 127)."]
[INFO] [stdout] 4  | |     name = U7, repr = u8, max = 127
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/u14_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A 14-bit integer (0 - 16383)."]
[INFO] [stdout] 4  | |     name = U14, repr = u16, max = 16383
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/channel_mod.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / newtype! {
[INFO] [stdout] 4  | |     #[doc = r"A MIDI channel (0 - 15)."]
[INFO] [stdout] 5  | |     name = Channel, repr = u8, max = 15
[INFO] [stdout] 6  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/key_number_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A key number (0 - 127), e.g. of a MIDI Note On message."]
[INFO] [stdout] 4  | |     name = KeyNumber, repr = u8, max = 127
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/controller_number_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A controller number (0 - 127) of a MIDI Control Change message."]
[INFO] [stdout] 4  | |     name = ControllerNumber, repr = u8, max = 127
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/u4_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A 4-bit integer (0 - 15)."]
[INFO] [stdout] 4  | |     name = U4, repr = u8, max = 15
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/u7_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A 7-bit integer (0 - 127)."]
[INFO] [stdout] 4  | |     name = U7, repr = u8, max = 127
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/newtype_macros.rs:57:57
[INFO] [stdout]    |
[INFO] [stdout] 57 |                           assert!($name::is_valid(value), format!(concat!("{} is not a valid ", stringify!($name), " value"), value));
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | 
[INFO] [stdout]   ::: src/u14_mod.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / newtype! {
[INFO] [stdout] 3  | |     #[doc = r"A 14-bit integer (0 - 16383)."]
[INFO] [stdout] 4  | |     name = U14, repr = u16, max = 16383
[INFO] [stdout] 5  | | }
[INFO] [stdout]    | |_- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 57 |                         assert!($name::is_valid(value), concat!("{} is not a valid ", stringify!($name), " value"), value);
[INFO] [stdout]    |                                                        --                                                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.10s
[INFO] running `Command { std: "docker" "inspect" "ec9b54463683a58054a009b93c6946212c5e1a9e0d36d7dc6377c8f962a3b48a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec9b54463683a58054a009b93c6946212c5e1a9e0d36d7dc6377c8f962a3b48a", kill_on_drop: false }`
[INFO] [stdout] ec9b54463683a58054a009b93c6946212c5e1a9e0d36d7dc6377c8f962a3b48a