[INFO] fetching crate observable-rs 0.0.1...
[INFO] testing observable-rs-0.0.1 against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] extracting crate observable-rs 0.0.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate observable-rs 0.0.1 on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate observable-rs 0.0.1
[INFO] finished tweaking crates.io crate observable-rs 0.0.1
[INFO] tweaked toml for crates.io crate observable-rs 0.0.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6aa22090654bb24b8ab9286ef40b700ff53a6ad4fdf9b234ded68828e6fd66ef
[INFO] running `Command { std: "docker" "start" "-a" "6aa22090654bb24b8ab9286ef40b700ff53a6ad4fdf9b234ded68828e6fd66ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6aa22090654bb24b8ab9286ef40b700ff53a6ad4fdf9b234ded68828e6fd66ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6aa22090654bb24b8ab9286ef40b700ff53a6ad4fdf9b234ded68828e6fd66ef", kill_on_drop: false }`
[INFO] [stdout] 6aa22090654bb24b8ab9286ef40b700ff53a6ad4fdf9b234ded68828e6fd66ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6303c5d10eb38ddb9460fbe2d84291880afbe9d5da76e11ce71503bd8dfc02e6
[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" "6303c5d10eb38ddb9460fbe2d84291880afbe9d5da76e11ce71503bd8dfc02e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling observable-rs v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Observe`, `Set`
[INFO] [stdout]  --> src/observable.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{Observe, Set};
[INFO] [stdout]   |             ^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "6303c5d10eb38ddb9460fbe2d84291880afbe9d5da76e11ce71503bd8dfc02e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6303c5d10eb38ddb9460fbe2d84291880afbe9d5da76e11ce71503bd8dfc02e6", kill_on_drop: false }`
[INFO] [stdout] 6303c5d10eb38ddb9460fbe2d84291880afbe9d5da76e11ce71503bd8dfc02e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d4b8d6f02966a7ce20f3742df77be5dee53d20a96ec944bf405f297901ec5d3
[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" "3d4b8d6f02966a7ce20f3742df77be5dee53d20a96ec944bf405f297901ec5d3", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `Observe`, `Set`
[INFO] [stdout]  --> src/observable.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{Observe, Set};
[INFO] [stdout]   |             ^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling observable-rs v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Observe`, `Set`
[INFO] [stdout]  --> src/observable.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{Observe, Set};
[INFO] [stdout]   |             ^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "3d4b8d6f02966a7ce20f3742df77be5dee53d20a96ec944bf405f297901ec5d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d4b8d6f02966a7ce20f3742df77be5dee53d20a96ec944bf405f297901ec5d3", kill_on_drop: false }`
[INFO] [stdout] 3d4b8d6f02966a7ce20f3742df77be5dee53d20a96ec944bf405f297901ec5d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 21e2a3c83ddb9718b9732753a3f2fa2f6441cc4a48f44431ff956d32d8faed16
[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" "21e2a3c83ddb9718b9732753a3f2fa2f6441cc4a48f44431ff956d32d8faed16", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused imports: `Observe`, `Set`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/observable.rs:3:13
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 3 | use crate::{Observe, Set};
[INFO] [stdout] 
[INFO] [stderr]   |             ^^^^^^^  ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `observable-rs` (lib) generated 1 warning
[INFO] [stderr] warning: `observable-rs` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/observable_rs-d0ee049af7773de9)
[INFO] [stderr]    Doc-tests observable-rs
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 3) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.63s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "21e2a3c83ddb9718b9732753a3f2fa2f6441cc4a48f44431ff956d32d8faed16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21e2a3c83ddb9718b9732753a3f2fa2f6441cc4a48f44431ff956d32d8faed16", kill_on_drop: false }`
[INFO] [stdout] 21e2a3c83ddb9718b9732753a3f2fa2f6441cc4a48f44431ff956d32d8faed16