[INFO] updating cached repository https://github.com/hermantolim/mac_derive
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 277ddfd5b720245148386a86bcf9f1b037ca0039
[INFO] testing hermantolim/mac_derive against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhermantolim%2Fmac_derive" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hermantolim/mac_derive on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hermantolim/mac_derive
[INFO] finished tweaking git repo https://github.com/hermantolim/mac_derive
[INFO] tweaked toml for git repo https://github.com/hermantolim/mac_derive written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/hermantolim/mac_derive already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b08335ece5223c3e75e6d2500093b4b4d316f6b384b7e96db50d9ce867de7bcc
[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" "b08335ece5223c3e75e6d2500093b4b4d316f6b384b7e96db50d9ce867de7bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b08335ece5223c3e75e6d2500093b4b4d316f6b384b7e96db50d9ce867de7bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b08335ece5223c3e75e6d2500093b4b4d316f6b384b7e96db50d9ce867de7bcc", kill_on_drop: false }`
[INFO] [stdout] b08335ece5223c3e75e6d2500093b4b4d316f6b384b7e96db50d9ce867de7bcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b4b54cee9471e48d68028eca771ec15a2de1d204b44285149bb2f8a6ababc07
[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" "2b4b54cee9471e48d68028eca771ec15a2de1d204b44285149bb2f8a6ababc07", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling mac_derive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `get_meta_items2`, `get_meta_items`
[INFO] [stdout]  --> src/ast/attr.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     get_meta_items, get_meta_items2, token_from_lit, RenameRule, ATTR,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Literal`, `TokenStream`, `TokenTree`
[INFO] [stdout]  --> src/ast/attr.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use proc_macro2::{Literal, TokenStream, TokenTree};
[INFO] [stdout]   |                   ^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashSet`
[INFO] [stdout]  --> src/ast/attr.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     collections::HashSet, convert::TryFrom, marker::PhantomData, str::FromStr,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Attribute`, `Meta`, `NestedMeta`, `ParseStream`, `Parse`
[INFO] [stdout]   --> src/ast/attr.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     parse::{Parse, ParseStream},
[INFO] [stdout]    |             ^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 13 |     spanned::Spanned,
[INFO] [stdout] 14 |     Attribute, Error, Ident, Lit, LitStr, Meta, MetaList, MetaNameValue,
[INFO] [stdout]    |     ^^^^^^^^^                             ^^^^
[INFO] [stdout] 15 |     NestedMeta, Result,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `write`
[INFO] [stdout]   --> src/ast/enum_repr.rs:80:18
[INFO] [stdout]    |
[INFO] [stdout] 80 |             fs::{write, File, OpenOptions},
[INFO] [stdout]    |                  ^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ContainerAttr`, `VariantAttr`
[INFO] [stdout]  --> src/ast/parser.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ast::{AttributesBucket, ContainerAttr, VariantAttr, ID};
[INFO] [stdout]   |                             ^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/ast/parser.rs:6:51
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{collections::HashSet, convert::TryFrom, hash::Hash};
[INFO] [stdout]   |                                                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MetaList`, `MetaNameValue`
[INFO] [stdout]  --> src/ast/parser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     MetaList, MetaNameValue, NestedMeta, Path, Result, Type,
[INFO] [stdout]   |     ^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `convert::TryFrom`
[INFO] [stdout]  --> src/ast/parser.rs:6:33
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{collections::HashSet, convert::TryFrom, hash::Hash};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]   --> src/ast/attr.rs:85:18
[INFO] [stdout]    |
[INFO] [stdout] 85 |             (id, list) if id == ATTR || id == ATTR_NEST || id == OTHER => {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]    --> src/ast/attr.rs:172:18
[INFO] [stdout]     |
[INFO] [stdout] 172 |             (id, list) if id == OTHER => Ok(VariantAttr::Trans(PhantomData)),
[INFO] [stdout]     |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `VarAttr`
[INFO] [stdout]    --> src/ast/attr.rs:136:12
[INFO] [stdout]     |
[INFO] [stdout] 136 | pub struct VarAttr<'a> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.77s
[INFO] running `Command { std: "docker" "inspect" "2b4b54cee9471e48d68028eca771ec15a2de1d204b44285149bb2f8a6ababc07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b4b54cee9471e48d68028eca771ec15a2de1d204b44285149bb2f8a6ababc07", kill_on_drop: false }`
[INFO] [stdout] 2b4b54cee9471e48d68028eca771ec15a2de1d204b44285149bb2f8a6ababc07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 663fb940aaf584b48a69497bf5e54ac205abbeea0d3664441e914269ecf74deb
[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" "663fb940aaf584b48a69497bf5e54ac205abbeea0d3664441e914269ecf74deb", kill_on_drop: false }`
[INFO] [stderr]    Compiling mac_derive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `get_meta_items2`, `get_meta_items`
[INFO] [stdout]  --> src/ast/attr.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     get_meta_items, get_meta_items2, token_from_lit, RenameRule, ATTR,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Literal`, `TokenStream`, `TokenTree`
[INFO] [stdout]  --> src/ast/attr.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use proc_macro2::{Literal, TokenStream, TokenTree};
[INFO] [stdout]   |                   ^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashSet`
[INFO] [stdout]  --> src/ast/attr.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     collections::HashSet, convert::TryFrom, marker::PhantomData, str::FromStr,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Attribute`, `Meta`, `NestedMeta`, `ParseStream`, `Parse`
[INFO] [stdout]   --> src/ast/attr.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     parse::{Parse, ParseStream},
[INFO] [stdout]    |             ^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 13 |     spanned::Spanned,
[INFO] [stdout] 14 |     Attribute, Error, Ident, Lit, LitStr, Meta, MetaList, MetaNameValue,
[INFO] [stdout]    |     ^^^^^^^^^                             ^^^^
[INFO] [stdout] 15 |     NestedMeta, Result,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `write`
[INFO] [stdout]   --> src/ast/enum_repr.rs:80:18
[INFO] [stdout]    |
[INFO] [stdout] 80 |             fs::{write, File, OpenOptions},
[INFO] [stdout]    |                  ^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ContainerAttr`, `VariantAttr`
[INFO] [stdout]  --> src/ast/parser.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ast::{AttributesBucket, ContainerAttr, VariantAttr, ID};
[INFO] [stdout]   |                             ^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/ast/parser.rs:6:51
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{collections::HashSet, convert::TryFrom, hash::Hash};
[INFO] [stdout]   |                                                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MetaList`, `MetaNameValue`
[INFO] [stdout]  --> src/ast/parser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     MetaList, MetaNameValue, NestedMeta, Path, Result, Type,
[INFO] [stdout]   |     ^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `convert::TryFrom`
[INFO] [stdout]  --> src/ast/parser.rs:6:33
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{collections::HashSet, convert::TryFrom, hash::Hash};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]   --> src/ast/attr.rs:85:18
[INFO] [stdout]    |
[INFO] [stdout] 85 |             (id, list) if id == ATTR || id == ATTR_NEST || id == OTHER => {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]    --> src/ast/attr.rs:172:18
[INFO] [stdout]     |
[INFO] [stdout] 172 |             (id, list) if id == OTHER => Ok(VariantAttr::Trans(PhantomData)),
[INFO] [stdout]     |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `VarAttr`
[INFO] [stdout]    --> src/ast/attr.rs:136:12
[INFO] [stdout]     |
[INFO] [stdout] 136 | pub struct VarAttr<'a> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/derive.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(trace_macros)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::identity`
[INFO] [stdout]    --> examples/derive.rs:156:5
[INFO] [stdout]     |
[INFO] [stdout] 156 | use std::convert::identity;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `get_meta_items2`, `get_meta_items`
[INFO] [stdout]  --> src/ast/attr.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     get_meta_items, get_meta_items2, token_from_lit, RenameRule, ATTR,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Literal`, `TokenStream`, `TokenTree`
[INFO] [stdout]  --> src/ast/attr.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use proc_macro2::{Literal, TokenStream, TokenTree};
[INFO] [stdout]   |                   ^^^^^^^  ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashSet`
[INFO] [stdout]  --> src/ast/attr.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     collections::HashSet, convert::TryFrom, marker::PhantomData, str::FromStr,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Attribute`, `Meta`, `NestedMeta`, `ParseStream`, `Parse`
[INFO] [stdout]   --> src/ast/attr.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     parse::{Parse, ParseStream},
[INFO] [stdout]    |             ^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 13 |     spanned::Spanned,
[INFO] [stdout] 14 |     Attribute, Error, Ident, Lit, LitStr, Meta, MetaList, MetaNameValue,
[INFO] [stdout]    |     ^^^^^^^^^                             ^^^^
[INFO] [stdout] 15 |     NestedMeta, Result,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `write`
[INFO] [stdout]   --> src/ast/enum_repr.rs:80:18
[INFO] [stdout]    |
[INFO] [stdout] 80 |             fs::{write, File, OpenOptions},
[INFO] [stdout]    |                  ^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ContainerAttr`, `VariantAttr`
[INFO] [stdout]  --> src/ast/parser.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use ast::{AttributesBucket, ContainerAttr, VariantAttr, ID};
[INFO] [stdout]   |                             ^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/ast/parser.rs:6:51
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{collections::HashSet, convert::TryFrom, hash::Hash};
[INFO] [stdout]   |                                                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MetaList`, `MetaNameValue`
[INFO] [stdout]  --> src/ast/parser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     MetaList, MetaNameValue, NestedMeta, Path, Result, Type,
[INFO] [stdout]   |     ^^^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mac_derive`.
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `convert::TryFrom`
[INFO] [stdout]  --> src/ast/parser.rs:6:33
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{collections::HashSet, convert::TryFrom, hash::Hash};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]   --> src/ast/attr.rs:85:18
[INFO] [stdout]    |
[INFO] [stdout] 85 |             (id, list) if id == ATTR || id == ATTR_NEST || id == OTHER => {
[INFO] [stdout]    |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]    --> src/ast/attr.rs:172:18
[INFO] [stdout]     |
[INFO] [stdout] 172 |             (id, list) if id == OTHER => Ok(VariantAttr::Trans(PhantomData)),
[INFO] [stdout]     |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `VarAttr`
[INFO] [stdout]    --> src/ast/attr.rs:136:12
[INFO] [stdout]     |
[INFO] [stdout] 136 | pub struct VarAttr<'a> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "663fb940aaf584b48a69497bf5e54ac205abbeea0d3664441e914269ecf74deb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "663fb940aaf584b48a69497bf5e54ac205abbeea0d3664441e914269ecf74deb", kill_on_drop: false }`
[INFO] [stdout] 663fb940aaf584b48a69497bf5e54ac205abbeea0d3664441e914269ecf74deb