[INFO] updating cached repository https://github.com/Gopiandcode/observable-rs
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f30920c76c5e15904055c5a736b23b817e998a50
[INFO] testing Gopiandcode/observable-rs against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGopiandcode%2Fobservable-rs" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Gopiandcode/observable-rs on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Gopiandcode/observable-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d7b3e9e984176ce4f4a888861413fdd03c06ee1b0cf0a1e54203b741ef506f2f
[INFO] running `"docker" "start" "-a" "d7b3e9e984176ce4f4a888861413fdd03c06ee1b0cf0a1e54203b741ef506f2f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling observable_rs v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Rc`
[INFO] [stderr]  --> src/lib.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::rc::{Weak, Rc};
[INFO] [stderr]   |                     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsRef`
[INFO] [stderr]  --> src/lib.rs:6:20
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::convert::{AsRef, AsMut};
[INFO] [stderr]   |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:14:43
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn register(&mut self, observer: Weak<Observer<M>>);
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:32:25
[INFO] [stderr]    |
[INFO] [stderr] 32 |     observers: Vec<Weak<Observer<M>>>
[INFO] [stderr]    |                         ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:44:43
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn register(&mut self, observer: Weak<Observer<M>>) {
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `"docker" "inspect" "d7b3e9e984176ce4f4a888861413fdd03c06ee1b0cf0a1e54203b741ef506f2f"`
[INFO] running `"docker" "rm" "-f" "d7b3e9e984176ce4f4a888861413fdd03c06ee1b0cf0a1e54203b741ef506f2f"`
[INFO] [stdout] d7b3e9e984176ce4f4a888861413fdd03c06ee1b0cf0a1e54203b741ef506f2f
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7d77e8554712a36469c5c95ca9acb561aed5f52e2bad63b2341b6dfe1c80537a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "7d77e8554712a36469c5c95ca9acb561aed5f52e2bad63b2341b6dfe1c80537a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling observable_rs v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Rc`
[INFO] [stderr]  --> src/lib.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::rc::{Weak, Rc};
[INFO] [stderr]   |                     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsRef`
[INFO] [stderr]  --> src/lib.rs:6:20
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::convert::{AsRef, AsMut};
[INFO] [stderr]   |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:14:43
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn register(&mut self, observer: Weak<Observer<M>>);
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:32:25
[INFO] [stderr]    |
[INFO] [stderr] 32 |     observers: Vec<Weak<Observer<M>>>
[INFO] [stderr]    |                         ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:44:43
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn register(&mut self, observer: Weak<Observer<M>>) {
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rc`
[INFO] [stderr]  --> src/lib.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::rc::{Weak, Rc};
[INFO] [stderr]   |                     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsRef`
[INFO] [stderr]  --> src/lib.rs:6:20
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::convert::{AsRef, AsMut};
[INFO] [stderr]   |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:14:43
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn register(&mut self, observer: Weak<Observer<M>>);
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:32:25
[INFO] [stderr]    |
[INFO] [stderr] 32 |     observers: Vec<Weak<Observer<M>>>
[INFO] [stderr]    |                         ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:44:43
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn register(&mut self, observer: Weak<Observer<M>>) {
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "7d77e8554712a36469c5c95ca9acb561aed5f52e2bad63b2341b6dfe1c80537a"`
[INFO] running `"docker" "rm" "-f" "7d77e8554712a36469c5c95ca9acb561aed5f52e2bad63b2341b6dfe1c80537a"`
[INFO] [stdout] 7d77e8554712a36469c5c95ca9acb561aed5f52e2bad63b2341b6dfe1c80537a
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1b55b86153d7f70fd662facfc6c5763e2ca5c936e57474199ec5a514b7e90e57
[INFO] running `"docker" "start" "-a" "1b55b86153d7f70fd662facfc6c5763e2ca5c936e57474199ec5a514b7e90e57"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `Rc`
[INFO] [stderr]  --> src/lib.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::rc::{Weak, Rc};
[INFO] [stderr]   |                     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsRef`
[INFO] [stderr]  --> src/lib.rs:6:20
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::convert::{AsRef, AsMut};
[INFO] [stderr]   |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:14:43
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn register(&mut self, observer: Weak<Observer<M>>);
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:32:25
[INFO] [stderr]    |
[INFO] [stderr] 32 |     observers: Vec<Weak<Observer<M>>>
[INFO] [stderr]    |                         ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:44:43
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn register(&mut self, observer: Weak<Observer<M>>) {
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rc`
[INFO] [stderr]  --> src/lib.rs:5:21
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::rc::{Weak, Rc};
[INFO] [stderr]   |                     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsRef`
[INFO] [stderr]  --> src/lib.rs:6:20
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::convert::{AsRef, AsMut};
[INFO] [stderr]   |                    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:14:43
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn register(&mut self, observer: Weak<Observer<M>>);
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:32:25
[INFO] [stderr]    |
[INFO] [stderr] 32 |     observers: Vec<Weak<Observer<M>>>
[INFO] [stderr]    |                         ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:44:43
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn register(&mut self, observer: Weak<Observer<M>>) {
[INFO] [stderr]    |                                           ^^^^^^^^^^^ help: use `dyn`: `dyn Observer<M>`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/observable_rs-104e77e87482481f
[INFO] [stderr]    Doc-tests observable_rs
[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
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1b55b86153d7f70fd662facfc6c5763e2ca5c936e57474199ec5a514b7e90e57"`
[INFO] running `"docker" "rm" "-f" "1b55b86153d7f70fd662facfc6c5763e2ca5c936e57474199ec5a514b7e90e57"`
[INFO] [stdout] 1b55b86153d7f70fd662facfc6c5763e2ca5c936e57474199ec5a514b7e90e57