[INFO] fetching crate observable-rs 0.0.1...
[INFO] testing observable-rs-0.0.1 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate observable-rs 0.0.1 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate observable-rs 0.0.1 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "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-54/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7d2ca940f91f36b18a9679e62313d66cce4e9c881c11abe0b5719e24b6323ad
[INFO] running `Command { std: "docker" "start" "-a" "e7d2ca940f91f36b18a9679e62313d66cce4e9c881c11abe0b5719e24b6323ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7d2ca940f91f36b18a9679e62313d66cce4e9c881c11abe0b5719e24b6323ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7d2ca940f91f36b18a9679e62313d66cce4e9c881c11abe0b5719e24b6323ad", kill_on_drop: false }`
[INFO] [stdout] e7d2ca940f91f36b18a9679e62313d66cce4e9c881c11abe0b5719e24b6323ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c88785f0121464936da1002badf502aff4a45164f168a0df4db43b4dd8ea143
[INFO] running `Command { std: "docker" "start" "-a" "9c88785f0121464936da1002badf502aff4a45164f168a0df4db43b4dd8ea143", 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 0.16s
[INFO] running `Command { std: "docker" "inspect" "9c88785f0121464936da1002badf502aff4a45164f168a0df4db43b4dd8ea143", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c88785f0121464936da1002badf502aff4a45164f168a0df4db43b4dd8ea143", kill_on_drop: false }`
[INFO] [stdout] 9c88785f0121464936da1002badf502aff4a45164f168a0df4db43b4dd8ea143
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd4f8b04a5c40f5d5ea23c0c034bfb5b8c33b56946cce7203c5d901556fa7ed2
[INFO] running `Command { std: "docker" "start" "-a" "bd4f8b04a5c40f5d5ea23c0c034bfb5b8c33b56946cce7203c5d901556fa7ed2", 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 0.62s
[INFO] running `Command { std: "docker" "inspect" "bd4f8b04a5c40f5d5ea23c0c034bfb5b8c33b56946cce7203c5d901556fa7ed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd4f8b04a5c40f5d5ea23c0c034bfb5b8c33b56946cce7203c5d901556fa7ed2", kill_on_drop: false }`
[INFO] [stdout] bd4f8b04a5c40f5d5ea23c0c034bfb5b8c33b56946cce7203c5d901556fa7ed2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5d9b25f2256b3650834bff6a2ae0f83c12987893b533bffe3fd9bda3f451382e
[INFO] running `Command { std: "docker" "start" "-a" "5d9b25f2256b3650834bff6a2ae0f83c12987893b533bffe3fd9bda3f451382e", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Observe`, `Set`
[INFO] [stderr]  --> src/observable.rs:3:13
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::{Observe, Set};
[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 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/observable_rs-20d2b0bfedadabbe)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests observable-rs
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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 0.28s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5d9b25f2256b3650834bff6a2ae0f83c12987893b533bffe3fd9bda3f451382e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d9b25f2256b3650834bff6a2ae0f83c12987893b533bffe3fd9bda3f451382e", kill_on_drop: false }`
[INFO] [stdout] 5d9b25f2256b3650834bff6a2ae0f83c12987893b533bffe3fd9bda3f451382e