[INFO] cloning repository https://github.com/rsuu/esyn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rsuu/esyn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frsuu%2Fesyn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frsuu%2Fesyn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3015d0aeae05a94ac6c136f8b4eb46fd130e7ab
[INFO] checking rsuu/esyn against try#bac5816c5f3d02cebd0599070af62d1782530294 for pr-150408
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frsuu%2Fesyn" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rsuu/esyn
[INFO] finished tweaking git repo https://github.com/rsuu/esyn
[INFO] tweaked toml for git repo https://github.com/rsuu/esyn written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rsuu/esyn on toolchain bac5816c5f3d02cebd0599070af62d1782530294
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bac5816c5f3d02cebd0599070af62d1782530294" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rsuu/esyn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bac5816c5f3d02cebd0599070af62d1782530294" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.61
[INFO] [stderr]   Downloaded proc-macro2 v1.0.85
[INFO] [stderr]   Downloaded prettyplease v0.2.20
[INFO] [stderr]   Downloaded thiserror v1.0.61
[INFO] [stderr]   Downloaded syn v2.0.66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+bac5816c5f3d02cebd0599070af62d1782530294" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 57de32f99bad460ea879612e9be2bb40eed82b195d6fc9da54ee1a89cad73246
[INFO] running `Command { std: "docker" "start" "-a" "57de32f99bad460ea879612e9be2bb40eed82b195d6fc9da54ee1a89cad73246", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57de32f99bad460ea879612e9be2bb40eed82b195d6fc9da54ee1a89cad73246", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57de32f99bad460ea879612e9be2bb40eed82b195d6fc9da54ee1a89cad73246", kill_on_drop: false }`
[INFO] [stdout] 57de32f99bad460ea879612e9be2bb40eed82b195d6fc9da54ee1a89cad73246
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+bac5816c5f3d02cebd0599070af62d1782530294" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6f84da1576c63593c3662eebf4ace7b7827bd865ae655c1cb75266f37d74b37
[INFO] running `Command { std: "docker" "start" "-a" "e6f84da1576c63593c3662eebf4ace7b7827bd865ae655c1cb75266f37d74b37", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.85
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling prettyplease v0.2.20
[INFO] [stderr]    Compiling thiserror v1.0.61
[INFO] [stderr]     Checking quote v1.0.36
[INFO] [stderr]     Checking syn v2.0.66
[INFO] [stderr]     Checking esyn-derive v0.9.1 (/opt/rustwide/workdir/crates/esyn-derive)
[INFO] [stdout] warning: unused import: `attr`
[INFO] [stdout]  --> crates/esyn-derive/src/ders_enum_named.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{attr, bound};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `generics`
[INFO] [stdout]  --> crates/esyn-derive/src/ders_enum_named.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let generics = bound::de_trait_bounds_struct(input.generics.clone());
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_generics`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `attr`
[INFO] [stdout]  --> crates/esyn-derive/src/ders_enum_named.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{attr, bound};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `generics`
[INFO] [stdout]  --> crates/esyn-derive/src/ders_enum_named.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let generics = bound::de_trait_bounds_struct(input.generics.clone());
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_generics`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling thiserror-impl v1.0.61
[INFO] [stdout] warning: unused import: `attr`
[INFO] [stdout]  --> crates/esyn-derive/src/ders_enum_named.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{attr, bound};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `generics`
[INFO] [stdout]  --> crates/esyn-derive/src/ders_enum_named.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let generics = bound::de_trait_bounds_struct(input.generics.clone());
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_generics`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking esyn v0.9.1 (/opt/rustwide/workdir/crates/esyn)
[INFO] [stdout] warning: unused variable: `sd`
[INFO] [stdout]   --> crates/esyn/src/ext/duration.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let sd = SynDur::from_str(&tmp);
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_sd`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `num` and `suffix` are never read
[INFO] [stdout]   --> crates/esyn/src/ext/duration.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct SynDur {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 38 |     num: u128,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 39 |     suffix: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> crates/esyn/src/ext/duration.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl SynDur {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn to_string(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `FnVisit` is never used
[INFO] [stdout]   --> crates/esyn/src/visit.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub type FnVisit<'other, 'ast, Input, Output> = Box<dyn FnMut(Input) -> Option<Output> + 'other>;
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WrapExprBlock` is never constructed
[INFO] [stdout]   --> crates/esyn/src/visit.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct WrapExprBlock<'ast> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> crates/esyn/src/parser.rs:155:56
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn _get_fn(&'ast self, fn_name: &str) -> Res<&'ast FnBlock> {
[INFO] [stdout]     |                 ----                              ---- ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |                                 |
[INFO] [stdout]     |                 the lifetime is named here        the same lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'ast`
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn _get_fn(&'ast self, fn_name: &str) -> Res<&'ast FnBlock<'ast>> {
[INFO] [stdout]     |                                                               ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `A` is never constructed
[INFO] [stdout]   --> crates/esyn/tests/misc.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     struct A {
[INFO] [stdout]    |            ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `B` is never constructed
[INFO] [stdout]   --> crates/esyn/tests/misc.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     struct B {
[INFO] [stdout]    |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BoxStruct` is never constructed
[INFO] [stdout]  --> crates/esyn/tests/struct.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct BoxStruct {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructNamed` is never constructed
[INFO] [stdout]   --> crates/esyn/tests/struct.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct StructNamed<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:114:17
[INFO] [stdout]     |
[INFO] [stdout] 114 | #[derive(Debug, EsynDe, EsynSer, Default)]
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 unreachable statement
[INFO] [stdout]     |                 any code following this expression is unreachable
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the derive macro `EsynDe` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:141:17
[INFO] [stdout]     |
[INFO] [stdout] 141 | #[derive(Debug, EsynDe, EsynSer, Default)]
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 unreachable statement
[INFO] [stdout]     |                 any code following this expression is unreachable
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the derive macro `EsynDe` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> crates/esyn/tests/enum_custom_syntax.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 | #[derive(Debug, EsynDe, EsynSer, Default, PartialEq)]
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 unreachable statement
[INFO] [stdout]    |                 any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `EsynDe` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> crates/esyn/tests/enum.rs:29:28
[INFO] [stdout]    |
[INFO] [stdout] 29 | #[derive(Debug, PartialEq, EsynDe)]
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            unreachable statement
[INFO] [stdout]    |                            any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `EsynDe` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `d1` is never used
[INFO] [stdout]   --> crates/esyn/examples/dev.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn d1() {
[INFO] [stdout]    |    ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `t1` is never used
[INFO] [stdout]   --> crates/esyn/examples/dev.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn t1() {
[INFO] [stdout]    |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `syn_parse_str` is never used
[INFO] [stdout]   --> crates/esyn/examples/dev.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn syn_parse_str() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Test` is never constructed
[INFO] [stdout]   --> crates/esyn/examples/dev.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 | struct Test {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S` is never constructed
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | struct S {
[INFO] [stdout]     |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `S2` is never constructed
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 | struct S2 {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `EnumNamed` is never used
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:115:6
[INFO] [stdout]     |
[INFO] [stdout] 115 | enum EnumNamed {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructUnit` is never constructed
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:124:8
[INFO] [stdout]     |
[INFO] [stdout] 124 | struct StructUnit;
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructUnnamed2` is never constructed
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | struct StructUnnamed2(u8, (i8, (u16, i16)));
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Enum` is never used
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:142:6
[INFO] [stdout]     |
[INFO] [stdout] 142 | enum Enum {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `typ` is never used
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:161:4
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn typ() {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `impls` is never used
[INFO] [stdout]    --> crates/esyn/examples/dev.rs:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | fn impls() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sd`
[INFO] [stdout]   --> crates/esyn/src/ext/duration.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let sd = SynDur::from_str(&tmp);
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_sd`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> crates/esyn/tests/enum.rs:45:28
[INFO] [stdout]    |
[INFO] [stdout] 45 | #[derive(Debug, PartialEq, EsynDe)]
[INFO] [stdout]    |                            ^^^^^^
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            unreachable statement
[INFO] [stdout]    |                            any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the derive macro `EsynDe` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `num` and `suffix` are never read
[INFO] [stdout]   --> crates/esyn/src/ext/duration.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct SynDur {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 38 |     num: u128,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 39 |     suffix: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> crates/esyn/src/ext/duration.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl SynDur {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn to_string(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `FnVisit` is never used
[INFO] [stdout]   --> crates/esyn/src/visit.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub type FnVisit<'other, 'ast, Input, Output> = Box<dyn FnMut(Input) -> Option<Output> + 'other>;
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WrapExprBlock` is never constructed
[INFO] [stdout]   --> crates/esyn/src/visit.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct WrapExprBlock<'ast> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> crates/esyn/src/parser.rs:155:56
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn _get_fn(&'ast self, fn_name: &str) -> Res<&'ast FnBlock> {
[INFO] [stdout]     |                 ----                              ---- ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |                                 |
[INFO] [stdout]     |                 the lifetime is named here        the same lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'ast`
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn _get_fn(&'ast self, fn_name: &str) -> Res<&'ast FnBlock<'ast>> {
[INFO] [stdout]     |                                                               ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> crates/esyn/tests/type.rs:303:32
[INFO] [stdout]     |
[INFO] [stdout] 303 |     #[derive(Debug, PartialEq, EsynDe, Default)]
[INFO] [stdout]     |                                ^^^^^^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                unreachable statement
[INFO] [stdout]     |                                any code following this expression is unreachable
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the derive macro `EsynDe` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> crates/esyn/examples/dev_derive_attr2.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 | #[derive(Debug, EsynDe, EsynSer, Default)]
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 unreachable statement
[INFO] [stdout]    |                 any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `EsynDe` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructEmpty` is never constructed
[INFO] [stdout]  --> crates/esyn/tests/enum.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct StructEmpty {}
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructEmpty2` is never constructed
[INFO] [stdout]  --> crates/esyn/tests/enum.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct StructEmpty2();
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructUnit` is never constructed
[INFO] [stdout]   --> crates/esyn/tests/enum.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct StructUnit;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructUnnamed` is never constructed
[INFO] [stdout]   --> crates/esyn/tests/enum.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct StructUnnamed(u8, String);
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructUnnamed2` is never constructed
[INFO] [stdout]   --> crates/esyn/tests/enum.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct StructUnnamed2(u8, (i8, (u16, i16)));
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StructUnnamed3` is never constructed
[INFO] [stdout]   --> crates/esyn/tests/enum.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct StructUnnamed3(u8, u8);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `EnumEmpty` is never used
[INFO] [stdout]    --> crates/esyn/tests/enum.rs:171:10
[INFO] [stdout]     |
[INFO] [stdout] 171 |     enum EnumEmpty {}
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.01s
[INFO] running `Command { std: "docker" "inspect" "e6f84da1576c63593c3662eebf4ace7b7827bd865ae655c1cb75266f37d74b37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6f84da1576c63593c3662eebf4ace7b7827bd865ae655c1cb75266f37d74b37", kill_on_drop: false }`
[INFO] [stdout] e6f84da1576c63593c3662eebf4ace7b7827bd865ae655c1cb75266f37d74b37
