[INFO] fetching crate unifier_set 0.2.0...
[INFO] building unifier_set-0.2.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate unifier_set 0.2.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate unifier_set 0.2.0
[INFO] finished tweaking crates.io crate unifier_set 0.2.0
[INFO] tweaked toml for crates.io crate unifier_set 0.2.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unifier_set 0.2.0 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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 4 packages to latest compatible versions
[INFO] [stderr]       Adding rpds v0.12.0 (available: v1.1.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0ec136052f228de47cb013f8a185def1055edfabdadd7f8a5dab4928e8340c1
[INFO] running `Command { std: "docker" "start" "-a" "e0ec136052f228de47cb013f8a185def1055edfabdadd7f8a5dab4928e8340c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0ec136052f228de47cb013f8a185def1055edfabdadd7f8a5dab4928e8340c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0ec136052f228de47cb013f8a185def1055edfabdadd7f8a5dab4928e8340c1", kill_on_drop: false }`
[INFO] [stdout] e0ec136052f228de47cb013f8a185def1055edfabdadd7f8a5dab4928e8340c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5a5b1ebab52b5875528e4cf9b5af828f56115248c9ddc447c4c0e3ca820633c
[INFO] running `Command { std: "docker" "start" "-a" "e5a5b1ebab52b5875528e4cf9b5af828f56115248c9ddc447c4c0e3ca820633c", kill_on_drop: false }`
[INFO] [stderr]    Compiling archery v0.4.0
[INFO] [stderr]    Compiling rpds v0.12.0
[INFO] [stderr]    Compiling unifier_set v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "e5a5b1ebab52b5875528e4cf9b5af828f56115248c9ddc447c4c0e3ca820633c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5a5b1ebab52b5875528e4cf9b5af828f56115248c9ddc447c4c0e3ca820633c", kill_on_drop: false }`
[INFO] [stdout] e5a5b1ebab52b5875528e4cf9b5af828f56115248c9ddc447c4c0e3ca820633c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5292fb0ff1207ec85ed9bb6df782c75aa839282da4408addf6b89d17530a39f
[INFO] running `Command { std: "docker" "start" "-a" "e5292fb0ff1207ec85ed9bb6df782c75aa839282da4408addf6b89d17530a39f", kill_on_drop: false }`
[INFO] [stderr]    Compiling dot_graph v0.2.3
[INFO] [stderr]    Compiling unifier_set v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]   --> src/unit_tests/mod.rs:58:34
[INFO] [stdout]    |
[INFO] [stdout] 58 |             Pred(h, cs) => Pred(h.clone(), cs.iter().map(f).collect()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "e5292fb0ff1207ec85ed9bb6df782c75aa839282da4408addf6b89d17530a39f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5292fb0ff1207ec85ed9bb6df782c75aa839282da4408addf6b89d17530a39f", kill_on_drop: false }`
[INFO] [stdout] e5292fb0ff1207ec85ed9bb6df782c75aa839282da4408addf6b89d17530a39f