[INFO] fetching crate rs_observable 0.1.4...
[INFO] testing rs_observable-0.1.4 against try#0abe69e6c16114311cc2700e972492e64d69c28f for pr-154065-1
[INFO] extracting crate rs_observable 0.1.4 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate rs_observable 0.1.4
[INFO] finished tweaking crates.io crate rs_observable 0.1.4
[INFO] tweaked toml for crates.io crate rs_observable 0.1.4 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rs_observable 0.1.4 on toolchain 0abe69e6c16114311cc2700e972492e64d69c28f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 47 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90af351ed39d8bb74273b38003e2b13966d86ef9c2168610f74e7c61f15c8e4d
[INFO] running `Command { std: "docker" "start" "-a" "90af351ed39d8bb74273b38003e2b13966d86ef9c2168610f74e7c61f15c8e4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90af351ed39d8bb74273b38003e2b13966d86ef9c2168610f74e7c61f15c8e4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90af351ed39d8bb74273b38003e2b13966d86ef9c2168610f74e7c61f15c8e4d", kill_on_drop: false }`
[INFO] [stdout] 90af351ed39d8bb74273b38003e2b13966d86ef9c2168610f74e7c61f15c8e4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8353644c52b280123d1048dbb17fc519e2d6b581314c53613d8a896b8934ca9
[INFO] running `Command { std: "docker" "start" "-a" "d8353644c52b280123d1048dbb17fc519e2d6b581314c53613d8a896b8934ca9", kill_on_drop: false }`
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling tokio-macros v2.6.1
[INFO] [stderr]    Compiling tokio v1.50.0
[INFO] [stderr]    Compiling rs_observable v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::observed_value::ObservedValue`
[INFO] [stdout]   --> src/observed_value.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     use crate::observed_value::ObservedValue;
[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 doc comment
[INFO] [stdout]   --> src/chobservable.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |           /// creates a new object
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 44 | /         ChObservable {
[INFO] [stdout] 45 | |             observers: Arc::new(Mutex::new(Vec::new())),
[INFO] [stdout] 46 | |             next_id: 1,
[INFO] [stdout] 47 | |         }
[INFO] [stdout]    | |_________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `notify` is never used
[INFO] [stdout]   --> src/observable.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub trait Observer<T: Clone> {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 10 |     fn notify(&mut self, data: T);
[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 `StoredObserver` is never constructed
[INFO] [stdout]   --> src/observable.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct StoredObserver<T: Clone> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/observable.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<T: Clone> StoredObserver<T> {
[INFO] [stdout]    | -------------------------------- associated function in this implementation
[INFO] [stdout] 19 |     pub fn new(id: u32, observer: Rc<RefCell<dyn Observer<T> + Send + Sync>>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Observable` is never constructed
[INFO] [stdout]   --> src/observable.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Observable<T: Clone> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `register`, `unregister`, `notify_observers`, and `notify_observers_borrowed` are never used
[INFO] [stdout]   --> src/observable.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl<T: Clone> Observable<T> {
[INFO] [stdout]    | ---------------------------- associated items in this implementation
[INFO] [stdout] 36 |     /// Creates a new Observable object
[INFO] [stdout] 37 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     pub fn register(&mut self, observer: Rc<RefCell<dyn Observer<T> + Send + Sync>>) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     pub fn unregister(&mut self, observer_id: u32) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn notify_observers(&self, data: T) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn notify_observers_borrowed(&self, data: &T) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ObservedValue` is never constructed
[INFO] [stdout]  --> src/observed_value.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct ObservedValue<T: Clone> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_value`, `reset_value`, `register`, and `unregister` are never used
[INFO] [stdout]   --> src/observed_value.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T: Clone> ObservedValue<T> {
[INFO] [stdout]    | ------------------------------- associated items in this implementation
[INFO] [stdout] 15 |     /// Create a new instance
[INFO] [stdout] 16 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn set_value(&mut self, v: &T) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn reset_value(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn register(&mut self, observer: Rc<RefCell<dyn Observer<Option<T>> + Send + Sync>>) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn unregister(&mut self, observer_id: u32) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyString` is never constructed
[INFO] [stdout]   --> src/observed_value.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 |     struct MyString(String);
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/observed_value.rs:86:16
[INFO] [stdout]    |
[INFO] [stdout] 85 |     impl MyString {
[INFO] [stdout]    |     ------------- associated function in this implementation
[INFO] [stdout] 86 |         pub fn new(v: &str) -> MyString {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ObserverString` is never constructed
[INFO] [stdout]    --> src/observed_value.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     struct ObserverString {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/observed_value.rs:108:16
[INFO] [stdout]     |
[INFO] [stdout] 107 |     impl ObserverString {
[INFO] [stdout]     |     ------------------- associated function in this implementation
[INFO] [stdout] 108 |         pub fn new() -> Self {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.52s
[INFO] running `Command { std: "docker" "inspect" "d8353644c52b280123d1048dbb17fc519e2d6b581314c53613d8a896b8934ca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8353644c52b280123d1048dbb17fc519e2d6b581314c53613d8a896b8934ca9", kill_on_drop: false }`
[INFO] [stdout] d8353644c52b280123d1048dbb17fc519e2d6b581314c53613d8a896b8934ca9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c973d81e7c8c3df856bf06b56acdad3aca656ed51016819636f69345a6b58543
[INFO] running `Command { std: "docker" "start" "-a" "c973d81e7c8c3df856bf06b56acdad3aca656ed51016819636f69345a6b58543", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling colorchoice v1.0.5
[INFO] [stderr]    Compiling anstyle-parse v1.0.0
[INFO] [stderr]    Compiling jiff v0.2.23
[INFO] [stderr]    Compiling rs_observable v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::observed_value::ObservedValue`
[INFO] [stdout]   --> src/observed_value.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     use crate::observed_value::ObservedValue;
[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 doc comment
[INFO] [stdout]   --> src/chobservable.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |           /// creates a new object
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 44 | /         ChObservable {
[INFO] [stdout] 45 | |             observers: Arc::new(Mutex::new(Vec::new())),
[INFO] [stdout] 46 | |             next_id: 1,
[INFO] [stdout] 47 | |         }
[INFO] [stdout]    | |_________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling anstream v1.0.0
[INFO] [stdout] warning: method `notify` is never used
[INFO] [stdout]   --> src/observable.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub trait Observer<T: Clone> {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 10 |     fn notify(&mut self, data: T);
[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 `StoredObserver` is never constructed
[INFO] [stdout]   --> src/observable.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct StoredObserver<T: Clone> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/observable.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<T: Clone> StoredObserver<T> {
[INFO] [stdout]    | -------------------------------- associated function in this implementation
[INFO] [stdout] 19 |     pub fn new(id: u32, observer: Rc<RefCell<dyn Observer<T> + Send + Sync>>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Observable` is never constructed
[INFO] [stdout]   --> src/observable.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Observable<T: Clone> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `register`, `unregister`, `notify_observers`, and `notify_observers_borrowed` are never used
[INFO] [stdout]   --> src/observable.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl<T: Clone> Observable<T> {
[INFO] [stdout]    | ---------------------------- associated items in this implementation
[INFO] [stdout] 36 |     /// Creates a new Observable object
[INFO] [stdout] 37 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     pub fn register(&mut self, observer: Rc<RefCell<dyn Observer<T> + Send + Sync>>) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     pub fn unregister(&mut self, observer_id: u32) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn notify_observers(&self, data: T) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn notify_observers_borrowed(&self, data: &T) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ObservedValue` is never constructed
[INFO] [stdout]  --> src/observed_value.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct ObservedValue<T: Clone> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_value`, `reset_value`, `register`, and `unregister` are never used
[INFO] [stdout]   --> src/observed_value.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T: Clone> ObservedValue<T> {
[INFO] [stdout]    | ------------------------------- associated items in this implementation
[INFO] [stdout] 15 |     /// Create a new instance
[INFO] [stdout] 16 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     pub fn set_value(&mut self, v: &T) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn reset_value(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn register(&mut self, observer: Rc<RefCell<dyn Observer<Option<T>> + Send + Sync>>) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn unregister(&mut self, observer_id: u32) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyString` is never constructed
[INFO] [stdout]   --> src/observed_value.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 |     struct MyString(String);
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/observed_value.rs:86:16
[INFO] [stdout]    |
[INFO] [stdout] 85 |     impl MyString {
[INFO] [stdout]    |     ------------- associated function in this implementation
[INFO] [stdout] 86 |         pub fn new(v: &str) -> MyString {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ObserverString` is never constructed
[INFO] [stdout]    --> src/observed_value.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     struct ObserverString {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/observed_value.rs:108:16
[INFO] [stdout]     |
[INFO] [stdout] 107 |     impl ObserverString {
[INFO] [stdout]     |     ------------------- associated function in this implementation
[INFO] [stdout] 108 |         pub fn new() -> Self {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling env_filter v1.0.1
[INFO] [stderr]    Compiling env_logger v0.11.10
[INFO] [stdout] warning: unused import: `crate::observable::Observable`
[INFO] [stdout]    --> src/observed_value.rs:127:13
[INFO] [stdout]     |
[INFO] [stdout] 127 |         use crate::observable::Observable;
[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 doc comment
[INFO] [stdout]   --> src/chobservable.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |           /// creates a new object
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 44 | /         ChObservable {
[INFO] [stdout] 45 | |             observers: Arc::new(Mutex::new(Vec::new())),
[INFO] [stdout] 46 | |             next_id: 1,
[INFO] [stdout] 47 | |         }
[INFO] [stdout]    | |_________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `notify_observers_borrowed` is never used
[INFO] [stdout]   --> src/observable.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl<T: Clone> Observable<T> {
[INFO] [stdout]    | ---------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub fn notify_observers_borrowed(&self, data: &T) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 10.92s
[INFO] running `Command { std: "docker" "inspect" "c973d81e7c8c3df856bf06b56acdad3aca656ed51016819636f69345a6b58543", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c973d81e7c8c3df856bf06b56acdad3aca656ed51016819636f69345a6b58543", kill_on_drop: false }`
[INFO] [stdout] c973d81e7c8c3df856bf06b56acdad3aca656ed51016819636f69345a6b58543
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f1fa42ea5ab166969ebfe941f13f3a78075e422f64826e2bbd34ed32486d5070
[INFO] running `Command { std: "docker" "start" "-a" "f1fa42ea5ab166969ebfe941f13f3a78075e422f64826e2bbd34ed32486d5070", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crate::observed_value::ObservedValue`
[INFO] [stderr]   --> src/observed_value.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |     use crate::observed_value::ObservedValue;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/chobservable.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |           /// creates a new object
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 44 | /         ChObservable {
[INFO] [stderr] 45 | |             observers: Arc::new(Mutex::new(Vec::new())),
[INFO] [stderr] 46 | |             next_id: 1,
[INFO] [stderr] 47 | |         }
[INFO] [stderr]    | |_________- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `notify` is never used
[INFO] [stderr]   --> src/observable.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr]  7 | pub trait Observer<T: Clone> {
[INFO] [stderr]    |           -------- method in this trait
[INFO] [stderr] ...
[INFO] [stderr] 10 |     fn notify(&mut self, data: T);
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `StoredObserver` is never constructed
[INFO] [stderr]   --> src/observable.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct StoredObserver<T: Clone> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/observable.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | impl<T: Clone> StoredObserver<T> {
[INFO] [stderr]    | -------------------------------- associated function in this implementation
[INFO] [stderr] 19 |     pub fn new(id: u32, observer: Rc<RefCell<dyn Observer<T> + Send + Sync>>) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Observable` is never constructed
[INFO] [stderr]   --> src/observable.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub struct Observable<T: Clone> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `register`, `unregister`, `notify_observers`, and `notify_observers_borrowed` are never used
[INFO] [stderr]   --> src/observable.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 35 | impl<T: Clone> Observable<T> {
[INFO] [stderr]    | ---------------------------- associated items in this implementation
[INFO] [stderr] 36 |     /// Creates a new Observable object
[INFO] [stderr] 37 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 50 |     pub fn register(&mut self, observer: Rc<RefCell<dyn Observer<T> + Send + Sync>>) -> u32 {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 62 |     pub fn unregister(&mut self, observer_id: u32) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 80 |     pub fn notify_observers(&self, data: T) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 91 |     pub fn notify_observers_borrowed(&self, data: &T) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ObservedValue` is never constructed
[INFO] [stderr]  --> src/observed_value.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub struct ObservedValue<T: Clone> {
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `set_value`, `reset_value`, `register`, and `unregister` are never used
[INFO] [stderr]   --> src/observed_value.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | impl<T: Clone> ObservedValue<T> {
[INFO] [stderr]    | ------------------------------- associated items in this implementation
[INFO] [stderr] 15 |     /// Create a new instance
[INFO] [stderr] 16 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 29 |     pub fn set_value(&mut self, v: &T) {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 37 |     pub fn reset_value(&mut self) {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 48 |     pub fn register(&mut self, observer: Rc<RefCell<dyn Observer<Option<T>> + Send + Sync>>) -> u32 {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 57 |     pub fn unregister(&mut self, observer_id: u32) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `MyString` is never constructed
[INFO] [stderr]   --> src/observed_value.rs:83:12
[INFO] [stderr]    |
[INFO] [stderr] 83 |     struct MyString(String);
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/observed_value.rs:86:16
[INFO] [stderr]    |
[INFO] [stderr] 85 |     impl MyString {
[INFO] [stderr]    |     ------------- associated function in this implementation
[INFO] [stderr] 86 |         pub fn new(v: &str) -> MyString {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ObserverString` is never constructed
[INFO] [stderr]    --> src/observed_value.rs:103:12
[INFO] [stderr]     |
[INFO] [stderr] 103 |     struct ObserverString {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/observed_value.rs:108:16
[INFO] [stderr]     |
[INFO] [stderr] 107 |     impl ObserverString {
[INFO] [stderr]     |     ------------------- associated function in this implementation
[INFO] [stderr] 108 |         pub fn new() -> Self {
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rs_observable` (lib) generated 13 warnings (run `cargo fix --lib -p rs_observable` to apply 1 suggestion)
[INFO] [stderr] warning: unused import: `crate::observable::Observable`
[INFO] [stderr]    --> src/observed_value.rs:127:13
[INFO] [stderr]     |
[INFO] [stderr] 127 |         use crate::observable::Observable;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `notify_observers_borrowed` is never used
[INFO] [stderr]   --> src/observable.rs:91:12
[INFO] [stderr]    |
[INFO] [stderr] 35 | impl<T: Clone> Observable<T> {
[INFO] [stderr]    | ---------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 91 |     pub fn notify_observers_borrowed(&self, data: &T) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rs_observable` (lib test) generated 3 warnings (1 duplicate) (run `cargo fix --lib -p rs_observable --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rs_observable-c1e2e3bf99708d39)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test observed_value::tests::test_01 ... ok
[INFO] [stdout] test chobservable::tests::test_chobservable_single ... ok
[INFO] [stdout] test observable::tests::int_test ... ok
[INFO] [stdout] test chobservable::tests::test_chobservable ... ok
[INFO] [stderr]    Doc-tests rs_observable
[INFO] [stdout] test chobservable::tests::test_chobservedvalue ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f1fa42ea5ab166969ebfe941f13f3a78075e422f64826e2bbd34ed32486d5070", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1fa42ea5ab166969ebfe941f13f3a78075e422f64826e2bbd34ed32486d5070", kill_on_drop: false }`
[INFO] [stdout] f1fa42ea5ab166969ebfe941f13f3a78075e422f64826e2bbd34ed32486d5070
