[INFO] fetching crate rctree 0.3.3...
[INFO] testing rctree-0.3.3 against 1.49.0 for beta-1.50-1
[INFO] extracting crate rctree 0.3.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate rctree 0.3.3 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rctree 0.3.3
[INFO] finished tweaking crates.io crate rctree 0.3.3
[INFO] tweaked toml for crates.io crate rctree 0.3.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7eec2080d9e71e1483b651a8d29aa5ddf49bb2c2e4a1ee11e9a5eb7b4082a316
[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" "7eec2080d9e71e1483b651a8d29aa5ddf49bb2c2e4a1ee11e9a5eb7b4082a316", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7eec2080d9e71e1483b651a8d29aa5ddf49bb2c2e4a1ee11e9a5eb7b4082a316", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7eec2080d9e71e1483b651a8d29aa5ddf49bb2c2e4a1ee11e9a5eb7b4082a316", kill_on_drop: false }`
[INFO] [stdout] 7eec2080d9e71e1483b651a8d29aa5ddf49bb2c2e4a1ee11e9a5eb7b4082a316
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97bd3d13c0ffd3ad023cf88a8a3aacfbf624f1ff5c3627dc2fd0b8daddbdf3d0
[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" "97bd3d13c0ffd3ad023cf88a8a3aacfbf624f1ff5c3627dc2fd0b8daddbdf3d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling rctree v0.3.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "97bd3d13c0ffd3ad023cf88a8a3aacfbf624f1ff5c3627dc2fd0b8daddbdf3d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97bd3d13c0ffd3ad023cf88a8a3aacfbf624f1ff5c3627dc2fd0b8daddbdf3d0", kill_on_drop: false }`
[INFO] [stdout] 97bd3d13c0ffd3ad023cf88a8a3aacfbf624f1ff5c3627dc2fd0b8daddbdf3d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e353c0316b5952d3359581c725d07cbd4ca11e4bd48edf508a0fb68f8624101
[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" "4e353c0316b5952d3359581c725d07cbd4ca11e4bd48edf508a0fb68f8624101", kill_on_drop: false }`
[INFO] [stderr]    Compiling rctree v0.3.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.33s
[INFO] running `Command { std: "docker" "inspect" "4e353c0316b5952d3359581c725d07cbd4ca11e4bd48edf508a0fb68f8624101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e353c0316b5952d3359581c725d07cbd4ca11e4bd48edf508a0fb68f8624101", kill_on_drop: false }`
[INFO] [stdout] 4e353c0316b5952d3359581c725d07cbd4ca11e4bd48edf508a0fb68f8624101
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7164da138ca7b19e0c7a3130fb2826d3a28ccbabb187f60e7e8f551a267a60a9
[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" "7164da138ca7b19e0c7a3130fb2826d3a28ccbabb187f60e7e8f551a267a60a9", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rctree-5963f0528a1ca217
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tests-41c104f579473786
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 19 tests
[INFO] [stdout] test children_1 ... ok
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] test root_1 ... ok
[INFO] [stdout] test make_deep_copy_1 ... ok
[INFO] [stdout] test make_copy_1 ... ok
[INFO] [stdout] test traverse_2 ... ok
[INFO] [stdout] test children_2 ... ok
[INFO] [stdout] test weak_2 ... ok
[INFO] [stdout] test root_2 ... ok
[INFO] [stdout] test traverse_1 ... ok
[INFO] [stdout] test weak_1 ... ok
[INFO] [stdout] test root_3 ... ok
[INFO] [stdout] test root_4 ... ok
[INFO] [stdout] test prepend_1 ... ok
[INFO] [stdout] test insert_after_1 ... ok
[INFO] [stdout] test iter_1 ... ok
[INFO] [stdout] test insert_before_1 ... ok
[INFO] [stdout] test append_1 ... ok
[INFO] [stdout] test stack_overflow ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rctree
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7164da138ca7b19e0c7a3130fb2826d3a28ccbabb187f60e7e8f551a267a60a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7164da138ca7b19e0c7a3130fb2826d3a28ccbabb187f60e7e8f551a267a60a9", kill_on_drop: false }`
[INFO] [stdout] 7164da138ca7b19e0c7a3130fb2826d3a28ccbabb187f60e7e8f551a267a60a9