[INFO] fetching crate polyhorn-core 0.4.0...
[INFO] testing polyhorn-core-0.4.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate polyhorn-core 0.4.0 into /workspace/builds/worker-46/source
[INFO] validating manifest of crates.io crate polyhorn-core 0.4.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polyhorn-core 0.4.0
[INFO] finished tweaking crates.io crate polyhorn-core 0.4.0
[INFO] tweaked toml for crates.io crate polyhorn-core 0.4.0 written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11123a0597266e86b77b4d523a114b14ecfb19a09e9bbf914d67fe82c1ace38b
[INFO] running `Command { std: "docker" "start" "-a" "11123a0597266e86b77b4d523a114b14ecfb19a09e9bbf914d67fe82c1ace38b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11123a0597266e86b77b4d523a114b14ecfb19a09e9bbf914d67fe82c1ace38b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11123a0597266e86b77b4d523a114b14ecfb19a09e9bbf914d67fe82c1ace38b", kill_on_drop: false }`
[INFO] [stdout] 11123a0597266e86b77b4d523a114b14ecfb19a09e9bbf914d67fe82c1ace38b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03dab158717541cfd94af3ede2559f1170b43d64486d9ce38ca8f3d9547e1a23
[INFO] running `Command { std: "docker" "start" "-a" "03dab158717541cfd94af3ede2559f1170b43d64486d9ce38ca8f3d9547e1a23", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling futures-executor v0.3.21
[INFO] [stderr]    Compiling futures v0.3.21
[INFO] [stderr]    Compiling polyhorn-core v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]  --> src/disposable.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Disposable(Box<dyn Drop>);
[INFO] [stdout]   |                               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dyn_drop)]` 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 24.91s
[INFO] running `Command { std: "docker" "inspect" "03dab158717541cfd94af3ede2559f1170b43d64486d9ce38ca8f3d9547e1a23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03dab158717541cfd94af3ede2559f1170b43d64486d9ce38ca8f3d9547e1a23", kill_on_drop: false }`
[INFO] [stdout] 03dab158717541cfd94af3ede2559f1170b43d64486d9ce38ca8f3d9547e1a23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7f850ef4969fd2e7ade097a3a26b2618cdd4c2ae34126fc868a3c9315d286ea
[INFO] running `Command { std: "docker" "start" "-a" "e7f850ef4969fd2e7ade097a3a26b2618cdd4c2ae34126fc868a3c9315d286ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling polyhorn-core v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]  --> src/disposable.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Disposable(Box<dyn Drop>);
[INFO] [stdout]   |                               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dyn_drop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout]  --> src/disposable.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Disposable(Box<dyn Drop>);
[INFO] [stdout]   |                               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dyn_drop)]` 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 4.79s
[INFO] running `Command { std: "docker" "inspect" "e7f850ef4969fd2e7ade097a3a26b2618cdd4c2ae34126fc868a3c9315d286ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7f850ef4969fd2e7ade097a3a26b2618cdd4c2ae34126fc868a3c9315d286ea", kill_on_drop: false }`
[INFO] [stdout] e7f850ef4969fd2e7ade097a3a26b2618cdd4c2ae34126fc868a3c9315d286ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d0117cefc5668d1eef4d8956daca01bc614a9d402d96230872a069ba55b17db1
[INFO] running `Command { std: "docker" "start" "-a" "d0117cefc5668d1eef4d8956daca01bc614a9d402d96230872a069ba55b17db1", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: types that do not implement `Drop` can still have drop glue, consider instead using `std::mem::needs_drop` to detect whether a type is trivially dropped
[INFO] [stdout] running 1 test
[INFO] [stderr]  --> src/disposable.rs:1:31
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Disposable(Box<dyn Drop>);
[INFO] [stderr]   |                               ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dyn_drop)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `polyhorn-core` (lib) generated 1 warning
[INFO] [stderr] warning: `polyhorn-core` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/polyhorn_core-9b810ad4344b0ba7)
[INFO] [stdout] test key::tests::test_key ... ok
[INFO] [stderr]    Doc-tests polyhorn-core
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d0117cefc5668d1eef4d8956daca01bc614a9d402d96230872a069ba55b17db1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0117cefc5668d1eef4d8956daca01bc614a9d402d96230872a069ba55b17db1", kill_on_drop: false }`
[INFO] [stdout] d0117cefc5668d1eef4d8956daca01bc614a9d402d96230872a069ba55b17db1