[INFO] fetching crate rctree 0.4.0...
[INFO] testing rctree-0.4.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate rctree 0.4.0 into /workspace/builds/worker-19/source
[INFO] validating manifest of crates.io crate rctree 0.4.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rctree 0.4.0
[INFO] finished tweaking crates.io crate rctree 0.4.0
[INFO] tweaked toml for crates.io crate rctree 0.4.0 written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f861d570b72f50b546741c794fcf165456c28da7d5074000df710e2b1395c4ee
[INFO] running `Command { std: "docker" "start" "-a" "f861d570b72f50b546741c794fcf165456c28da7d5074000df710e2b1395c4ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f861d570b72f50b546741c794fcf165456c28da7d5074000df710e2b1395c4ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f861d570b72f50b546741c794fcf165456c28da7d5074000df710e2b1395c4ee", kill_on_drop: false }`
[INFO] [stdout] f861d570b72f50b546741c794fcf165456c28da7d5074000df710e2b1395c4ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf7204b507fb0b1e5a83fdeed2ac557399cd9ed2f41555eba9145dc6b18b936e
[INFO] running `Command { std: "docker" "start" "-a" "bf7204b507fb0b1e5a83fdeed2ac557399cd9ed2f41555eba9145dc6b18b936e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rctree v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "bf7204b507fb0b1e5a83fdeed2ac557399cd9ed2f41555eba9145dc6b18b936e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf7204b507fb0b1e5a83fdeed2ac557399cd9ed2f41555eba9145dc6b18b936e", kill_on_drop: false }`
[INFO] [stdout] bf7204b507fb0b1e5a83fdeed2ac557399cd9ed2f41555eba9145dc6b18b936e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d39262ee507af7b2ceb6ea63c0acd45b6a3e7f20beab9942e1d8d291278d2137
[INFO] running `Command { std: "docker" "start" "-a" "d39262ee507af7b2ceb6ea63c0acd45b6a3e7f20beab9942e1d8d291278d2137", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rctree v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `Command { std: "docker" "inspect" "d39262ee507af7b2ceb6ea63c0acd45b6a3e7f20beab9942e1d8d291278d2137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d39262ee507af7b2ceb6ea63c0acd45b6a3e7f20beab9942e1d8d291278d2137", kill_on_drop: false }`
[INFO] [stdout] d39262ee507af7b2ceb6ea63c0acd45b6a3e7f20beab9942e1d8d291278d2137
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8beb01a8d86e776d8a0f2a30215279ed54d9fcd950ec028e21d767e34cb7aee0
[INFO] running `Command { std: "docker" "start" "-a" "8beb01a8d86e776d8a0f2a30215279ed54d9fcd950ec028e21d767e34cb7aee0", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rctree-04a58d09600f7117)
[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] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-964b295059e66844)
[INFO] [stdout] test children_1 ... ok
[INFO] [stdout] test children_2 ... ok
[INFO] [stdout] test it_works ... 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 weak_1 ... ok
[INFO] [stdout] test weak_2 ... ok
[INFO] [stdout] test traverse_1 ... ok
[INFO] [stdout] test append_1 - should panic ... ok
[INFO] [stdout] test insert_after_1 - should panic ... ok
[INFO] [stdout] test insert_before_1 - should panic ... ok
[INFO] [stdout] test iter_1 - should panic ... ok
[INFO] [stdout] test prepend_1 - should panic ... ok
[INFO] [stdout] test stack_overflow ... ok
[INFO] [stderr]    Doc-tests rctree
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.01s
[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" "8beb01a8d86e776d8a0f2a30215279ed54d9fcd950ec028e21d767e34cb7aee0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8beb01a8d86e776d8a0f2a30215279ed54d9fcd950ec028e21d767e34cb7aee0", kill_on_drop: false }`
[INFO] [stdout] 8beb01a8d86e776d8a0f2a30215279ed54d9fcd950ec028e21d767e34cb7aee0