[INFO] fetching crate make_singleton 1.0.0...
[INFO] testing make_singleton-1.0.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate make_singleton 1.0.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate make_singleton 1.0.0 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 make_singleton 1.0.0
[INFO] finished tweaking crates.io crate make_singleton 1.0.0
[INFO] tweaked toml for crates.io crate make_singleton 1.0.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate make_singleton 1.0.0 already has a lockfile, it will not be regenerated
[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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 3cce21fb5b61393b501616ba79fd7832b7e0aaf3e2a2caf87e50aaaafd5ae2d0
[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" "3cce21fb5b61393b501616ba79fd7832b7e0aaf3e2a2caf87e50aaaafd5ae2d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cce21fb5b61393b501616ba79fd7832b7e0aaf3e2a2caf87e50aaaafd5ae2d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cce21fb5b61393b501616ba79fd7832b7e0aaf3e2a2caf87e50aaaafd5ae2d0", kill_on_drop: false }`
[INFO] [stdout] 3cce21fb5b61393b501616ba79fd7832b7e0aaf3e2a2caf87e50aaaafd5ae2d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 5fd1568b1be6796fde451ba185a581d9eb3e53952cd3c60274f05ca0ad10fba6
[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" "5fd1568b1be6796fde451ba185a581d9eb3e53952cd3c60274f05ca0ad10fba6", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling make_singleton v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.46s
[INFO] running `Command { std: "docker" "inspect" "5fd1568b1be6796fde451ba185a581d9eb3e53952cd3c60274f05ca0ad10fba6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fd1568b1be6796fde451ba185a581d9eb3e53952cd3c60274f05ca0ad10fba6", kill_on_drop: false }`
[INFO] [stdout] 5fd1568b1be6796fde451ba185a581d9eb3e53952cd3c60274f05ca0ad10fba6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 9b875dd1e5f3c25bb8f0752c8f373b3d9c3bdb9690e25b5a0f6f95f40a8d4663
[INFO] running `Command { std: "docker" "start" "-a" "9b875dd1e5f3c25bb8f0752c8f373b3d9c3bdb9690e25b5a0f6f95f40a8d4663", kill_on_drop: false }`
[INFO] [stderr]    Compiling make_singleton v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "9b875dd1e5f3c25bb8f0752c8f373b3d9c3bdb9690e25b5a0f6f95f40a8d4663", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b875dd1e5f3c25bb8f0752c8f373b3d9c3bdb9690e25b5a0f6f95f40a8d4663", kill_on_drop: false }`
[INFO] [stdout] 9b875dd1e5f3c25bb8f0752c8f373b3d9c3bdb9690e25b5a0f6f95f40a8d4663
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cb6a83bb2d0d2f15331e26809afe2b0a4066f0f7fffeb1bbc40f36e1256ee274
[INFO] running `Command { std: "docker" "start" "-a" "cb6a83bb2d0d2f15331e26809afe2b0a4066f0f7fffeb1bbc40f36e1256ee274", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/make_singleton-3151092f9c47af90
[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]    Doc-tests make_singleton
[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" "cb6a83bb2d0d2f15331e26809afe2b0a4066f0f7fffeb1bbc40f36e1256ee274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb6a83bb2d0d2f15331e26809afe2b0a4066f0f7fffeb1bbc40f36e1256ee274", kill_on_drop: false }`
[INFO] [stdout] cb6a83bb2d0d2f15331e26809afe2b0a4066f0f7fffeb1bbc40f36e1256ee274