[INFO] crate opus-db 0.1.0 is already in cache
[INFO] extracting crate opus-db 0.1.0 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/opus-db/0.1.0
[INFO] extracting crate opus-db 0.1.0 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/opus-db/0.1.0
[INFO] validating manifest of opus-db-0.1.0 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of opus-db-0.1.0 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing opus-db-0.1.0
[INFO] finished frobbing opus-db-0.1.0
[INFO] frobbed toml for opus-db-0.1.0 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/opus-db/0.1.0/Cargo.toml
[INFO] started frobbing opus-db-0.1.0
[INFO] finished frobbing opus-db-0.1.0
[INFO] frobbed toml for opus-db-0.1.0 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/opus-db/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking opus-db-0.1.0 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-3/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/opus-db/0.1.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b394048862998316a419cf112ebc6bc8c31b9f3e16611de294fa37803ec8482f
[INFO] running `"docker" "start" "-a" "b394048862998316a419cf112ebc6bc8c31b9f3e16611de294fa37803ec8482f"`
[INFO] [stderr]     Checking opus-db v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/lib.rs:4:33
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                                 ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::result`
[INFO] [stderr]  --> src/lib.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::result;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `database` should have an upper camel case name
[INFO] [stderr]   --> src/lib.rs:14:11
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub trait database {
[INFO] [stderr]    |           ^^^^^^^^ help: convert the identifier to upper camel case: `Database`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `AttributeHandler`, `Database`, `UserHandler`, `env`
[INFO] [stderr]   --> src/lib.rs:97:17
[INFO] [stderr]    |
[INFO] [stderr] 97 |     use super::{env, AttributeHandler, Database, UserHandler};
[INFO] [stderr]    |                 ^^^  ^^^^^^^^^^^^^^^^  ^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/attributes.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |             fs::File::create(&base_dir.join("log")).unwrap_or(panic!("Could not open file"));
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file_log`
[INFO] [stderr]   --> src/attributes.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         let file_log =
[INFO] [stderr]    |             ^^^^^^^^ help: consider prefixing with an underscore: `_file_log`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `parent`
[INFO] [stderr]   --> src/attributes.rs:30:52
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn new<P: AsRef<Path>>(id: Id, parent_path: P, parent: Option<Id>) -> Self {
[INFO] [stderr]    |                                                    ^^^^^^ help: consider prefixing with an underscore: `_parent`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]   --> src/attributes.rs:51:31
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn add_participant(&self, id: Id, permissions: PermissionSet) -> AttributeResult {
[INFO] [stderr]    |                               ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `permissions`
[INFO] [stderr]   --> src/attributes.rs:51:39
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn add_participant(&self, id: Id, permissions: PermissionSet) -> AttributeResult {
[INFO] [stderr]    |                                       ^^^^^^^^^^^ help: consider prefixing with an underscore: `_permissions`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `current_state`
[INFO] [stderr]   --> src/attributes.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     current_state: String, // XXX: what should this type be?
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `parent`
[INFO] [stderr]   --> src/attributes.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     parent: Option<Id>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `base_dir`
[INFO] [stderr]   --> src/attributes.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     base_dir: PathBuf,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `participants`
[INFO] [stderr]   --> src/attributes.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     participants: HashMap<Id, PermissionSet>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `children`
[INFO] [stderr]   --> src/attributes.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     children: HashSet<Id>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `log_buffer`
[INFO] [stderr]   --> src/attributes.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     log_buffer: io::BufWriter<fs::File>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/attributes.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn new<P: AsRef<Path>>(id: Id, parent_path: P, parent: Option<Id>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_participant`
[INFO] [stderr]   --> src/attributes.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn add_participant(&self, id: Id, permissions: PermissionSet) -> AttributeResult {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_participant`
[INFO] [stderr]   --> src/attributes.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     fn remove_participant(&mut self, participant_id: Id) -> Option<Id> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `AttributeResult`
[INFO] [stderr]   --> src/attributes.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | type AttributeResult = result::Result<Attribute, io::Error>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `attribute_handler`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     attribute_handler: AttributeHandler,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `user_handler`
[INFO] [stderr]   --> src/lib.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     user_handler: UserHandler,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/lib.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/lib.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn new<P: AsRef<Path>>(parent_path: P) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cache`
[INFO] [stderr]   --> src/lib.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     cache: HashMap<Id, Attribute>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/lib.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn new<P: AsRef<Path>>(parent_path: P) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `expected_root` in this scope
[INFO] [stderr]    --> src/lib.rs:106:48
[INFO] [stderr]     |
[INFO] [stderr] 106 |         assert_eq!(attribute_handler.base_dir, expected_root);
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `expected_root` in this scope
[INFO] [stderr]    --> src/lib.rs:118:43
[INFO] [stderr]     |
[INFO] [stderr] 118 |         assert_eq!(user_handler.base_dir, expected_root);
[INFO] [stderr]     |                                           ^^^^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `expected_root` in this scope
[INFO] [stderr]    --> src/lib.rs:130:33
[INFO] [stderr]     |
[INFO] [stderr] 130 |         assert_eq!(db.base_dir, expected_root);
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/lib.rs:4:33
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                                 ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::result`
[INFO] [stderr]  --> src/lib.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::result;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `database` should have an upper camel case name
[INFO] [stderr]   --> src/lib.rs:14:11
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub trait database {
[INFO] [stderr]    |           ^^^^^^^^ help: convert the identifier to upper camel case: `Database`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/attributes.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |             fs::File::create(&base_dir.join("log")).unwrap_or(panic!("Could not open file"));
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `opus-db`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b394048862998316a419cf112ebc6bc8c31b9f3e16611de294fa37803ec8482f"`
[INFO] running `"docker" "rm" "-f" "b394048862998316a419cf112ebc6bc8c31b9f3e16611de294fa37803ec8482f"`
[INFO] [stdout] b394048862998316a419cf112ebc6bc8c31b9f3e16611de294fa37803ec8482f