[INFO] fetching crate shared_singleton 0.1.0...
[INFO] testing shared_singleton-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate shared_singleton 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate shared_singleton 0.1.0 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 shared_singleton 0.1.0
[INFO] finished tweaking crates.io crate shared_singleton 0.1.0
[INFO] tweaked toml for crates.io crate shared_singleton 0.1.0 written to /workspace/builds/worker-8/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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stdout] 23768ba1f5815ae67ccb3ead9c44413083747a9a2b9fdb8b53945e47854e161f
[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" "23768ba1f5815ae67ccb3ead9c44413083747a9a2b9fdb8b53945e47854e161f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23768ba1f5815ae67ccb3ead9c44413083747a9a2b9fdb8b53945e47854e161f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23768ba1f5815ae67ccb3ead9c44413083747a9a2b9fdb8b53945e47854e161f", kill_on_drop: false }`
[INFO] [stdout] 23768ba1f5815ae67ccb3ead9c44413083747a9a2b9fdb8b53945e47854e161f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 2b28edf8580483c0278fc8ef4a1291c0ebb91253c2b4528b99f987bb398280bd
[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" "2b28edf8580483c0278fc8ef4a1291c0ebb91253c2b4528b99f987bb398280bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling shared_singleton v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "2b28edf8580483c0278fc8ef4a1291c0ebb91253c2b4528b99f987bb398280bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b28edf8580483c0278fc8ef4a1291c0ebb91253c2b4528b99f987bb398280bd", kill_on_drop: false }`
[INFO] [stdout] 2b28edf8580483c0278fc8ef4a1291c0ebb91253c2b4528b99f987bb398280bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stdout] 0d346d143f4d9e51837e59a124db5dd6a24bb2bec44d40e4d1d8ac29c574239a
[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" "0d346d143f4d9e51837e59a124db5dd6a24bb2bec44d40e4d1d8ac29c574239a", kill_on_drop: false }`
[INFO] [stderr]    Compiling shared_singleton v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "0d346d143f4d9e51837e59a124db5dd6a24bb2bec44d40e4d1d8ac29c574239a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d346d143f4d9e51837e59a124db5dd6a24bb2bec44d40e4d1d8ac29c574239a", kill_on_drop: false }`
[INFO] [stdout] 0d346d143f4d9e51837e59a124db5dd6a24bb2bec44d40e4d1d8ac29c574239a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] b5230d36a76a195b7c8c3a78d72de47b02603da20c400cd5f6a3d5b39ada1feb
[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" "b5230d36a76a195b7c8c3a78d72de47b02603da20c400cd5f6a3d5b39ada1feb", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/shared_singleton-49a680333ca3f879
[INFO] [stdout] running 6 tests
[INFO] [stdout] test singleton::tests::arc_mutex_test ... ok
[INFO] [stdout] test singleton::tests::rc_cell_test ... ok
[INFO] [stdout] test singleton::tests::rc_refcell_test ... ok
[INFO] [stdout] test singleton::tests::arc_rwlock_test ... ok
[INFO] [stdout] test singleton::tests::arc_test ... ok
[INFO] [stdout] test singleton::tests::rc_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests shared_singleton
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - (line 45) ... ok
[INFO] [stdout] test src/lib.rs - (line 10) ... ok
[INFO] [stdout] test src/lib.rs - (line 63) ... ok
[INFO] [stdout] test src/lib.rs - (line 26) ... ok
[INFO] [stdout] test src/lib.rs - (line 79) ... ok
[INFO] [stdout] test src/lib.rs - (line 106) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.46s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b5230d36a76a195b7c8c3a78d72de47b02603da20c400cd5f6a3d5b39ada1feb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5230d36a76a195b7c8c3a78d72de47b02603da20c400cd5f6a3d5b39ada1feb", kill_on_drop: false }`
[INFO] [stdout] b5230d36a76a195b7c8c3a78d72de47b02603da20c400cd5f6a3d5b39ada1feb