[INFO] fetching crate gc-arena 0.2.0...
[INFO] testing gc-arena-0.2.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate gc-arena 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate gc-arena 0.2.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gc-arena 0.2.0
[INFO] finished tweaking crates.io crate gc-arena 0.2.0
[INFO] tweaked toml for crates.io crate gc-arena 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] 40e9cebf22bf2450fc92de8224d99e1a4a992c13d9020da66d5e6276ceeaad26
[INFO] running `Command { std: "docker" "start" "-a" "40e9cebf22bf2450fc92de8224d99e1a4a992c13d9020da66d5e6276ceeaad26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40e9cebf22bf2450fc92de8224d99e1a4a992c13d9020da66d5e6276ceeaad26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40e9cebf22bf2450fc92de8224d99e1a4a992c13d9020da66d5e6276ceeaad26", kill_on_drop: false }`
[INFO] [stdout] 40e9cebf22bf2450fc92de8224d99e1a4a992c13d9020da66d5e6276ceeaad26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06e2150e4931300b8f8c12f46730e2f5583d554b878cb406065d469f93dbce0a
[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" "06e2150e4931300b8f8c12f46730e2f5583d554b878cb406065d469f93dbce0a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling gc-arena-derive v0.2.0
[INFO] [stderr]    Compiling gc-arena v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: bounds on `T: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]  --> src/no_drop.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl<T: Drop> MustNotImplDrop for T {}
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(drop_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.76s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "06e2150e4931300b8f8c12f46730e2f5583d554b878cb406065d469f93dbce0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06e2150e4931300b8f8c12f46730e2f5583d554b878cb406065d469f93dbce0a", kill_on_drop: false }`
[INFO] [stdout] 06e2150e4931300b8f8c12f46730e2f5583d554b878cb406065d469f93dbce0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", 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] 8f371ee48973a1e4a90e3c1d1984459a7f498c8c747f4ab23db9dd9588fd2a68
[INFO] running `Command { std: "docker" "start" "-a" "8f371ee48973a1e4a90e3c1d1984459a7f498c8c747f4ab23db9dd9588fd2a68", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stdout] warning: bounds on `T: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]  --> src/no_drop.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl<T: Drop> MustNotImplDrop for T {}
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(drop_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling gc-arena v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: bounds on `T: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]  --> src/no_drop.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl<T: Drop> MustNotImplDrop for T {}
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(drop_bounds)]` 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 5.35s
[INFO] running `Command { std: "docker" "inspect" "8f371ee48973a1e4a90e3c1d1984459a7f498c8c747f4ab23db9dd9588fd2a68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f371ee48973a1e4a90e3c1d1984459a7f498c8c747f4ab23db9dd9588fd2a68", kill_on_drop: false }`
[INFO] [stdout] 8f371ee48973a1e4a90e3c1d1984459a7f498c8c747f4ab23db9dd9588fd2a68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6be189c6f81ed7ea8f14dac5367e55e3239212be81e4ba2400634e12c7238848
[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" "6be189c6f81ed7ea8f14dac5367e55e3239212be81e4ba2400634e12c7238848", kill_on_drop: false }`
[INFO] [stderr] warning: bounds on `T: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stderr]  --> src/no_drop.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 | impl<T: Drop> MustNotImplDrop for T {}
[INFO] [stderr]   |         ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(drop_bounds)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on `T: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stderr]  --> src/no_drop.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 | impl<T: Drop> MustNotImplDrop for T {}
[INFO] [stderr]   |         ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(drop_bounds)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/gc_arena-9d997a4e024be477
[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] [stderr]      Running /opt/rustwide/target/debug/deps/tests-fb0b3a9da5a2207e
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test derive_collect ... ok
[INFO] [stdout] test simple_allocation ... ok
[INFO] [stdout] test all_garbage_collected ... ok
[INFO] [stdout] test all_dropped ... ok
[INFO] [stdout] test repeated_allocation_deallocation ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.19s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests gc-arena
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/arena.rs - make_arena (line 64) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.49s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6be189c6f81ed7ea8f14dac5367e55e3239212be81e4ba2400634e12c7238848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6be189c6f81ed7ea8f14dac5367e55e3239212be81e4ba2400634e12c7238848", kill_on_drop: false }`
[INFO] [stdout] 6be189c6f81ed7ea8f14dac5367e55e3239212be81e4ba2400634e12c7238848