[INFO] cloning repository https://github.com/Gopiandcode/observable-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Gopiandcode/observable-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGopiandcode%2Fobservable-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGopiandcode%2Fobservable-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f30920c76c5e15904055c5a736b23b817e998a50
[INFO] checking Gopiandcode/observable-rs against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGopiandcode%2Fobservable-rs" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Gopiandcode/observable-rs on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Gopiandcode/observable-rs
[INFO] finished tweaking git repo https://github.com/Gopiandcode/observable-rs
[INFO] tweaked toml for git repo https://github.com/Gopiandcode/observable-rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Gopiandcode/observable-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dependent_view v1.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d324d33c017698fd65e017654c8f6be6d23b0d9bf60604c894d3eca3ade333d
[INFO] running `Command { std: "docker" "start" "-a" "8d324d33c017698fd65e017654c8f6be6d23b0d9bf60604c894d3eca3ade333d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d324d33c017698fd65e017654c8f6be6d23b0d9bf60604c894d3eca3ade333d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d324d33c017698fd65e017654c8f6be6d23b0d9bf60604c894d3eca3ade333d", kill_on_drop: false }`
[INFO] [stdout] 8d324d33c017698fd65e017654c8f6be6d23b0d9bf60604c894d3eca3ade333d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe27834f253b6f2ac40703f0dbc0690e5281a0ce367f7a27432735c145b47595
[INFO] running `Command { std: "docker" "start" "-a" "fe27834f253b6f2ac40703f0dbc0690e5281a0ce367f7a27432735c145b47595", kill_on_drop: false }`
[INFO] [stderr]     Checking observable_rs v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Rc`
[INFO] [stdout]  --> src/lib.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::rc::{Weak, Rc};
[INFO] [stdout]   |                     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `AsRef`
[INFO] [stdout]  --> src/lib.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::convert::{AsRef, AsMut};
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:14:43
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn register(&mut self, observer: Weak<Observer<M>>);
[INFO] [stdout]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:32:25
[INFO] [stdout]    |
[INFO] [stdout] 32 |     observers: Vec<Weak<Observer<M>>>
[INFO] [stdout]    |                         ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:44:43
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn register(&mut self, observer: Weak<Observer<M>>) {
[INFO] [stdout]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rc`
[INFO] [stdout]  --> src/lib.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::rc::{Weak, Rc};
[INFO] [stdout]   |                     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `AsRef`
[INFO] [stdout]  --> src/lib.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::convert::{AsRef, AsMut};
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:14:43
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn register(&mut self, observer: Weak<Observer<M>>);
[INFO] [stdout]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:32:25
[INFO] [stdout]    |
[INFO] [stdout] 32 |     observers: Vec<Weak<Observer<M>>>
[INFO] [stdout]    |                         ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:44:43
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn register(&mut self, observer: Weak<Observer<M>>) {
[INFO] [stdout]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.27s
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fe27834f253b6f2ac40703f0dbc0690e5281a0ce367f7a27432735c145b47595", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe27834f253b6f2ac40703f0dbc0690e5281a0ce367f7a27432735c145b47595", kill_on_drop: false }`
[INFO] [stdout] fe27834f253b6f2ac40703f0dbc0690e5281a0ce367f7a27432735c145b47595