[INFO] fetching crate prefix-tree 0.5.0...
[INFO] testing prefix-tree-0.5.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate prefix-tree 0.5.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate prefix-tree 0.5.0 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 prefix-tree 0.5.0
[INFO] finished tweaking crates.io crate prefix-tree 0.5.0
[INFO] tweaked toml for crates.io crate prefix-tree 0.5.0 written to /workspace/builds/worker-0/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-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e70e0dcf544f02a1825c4c5bea326403be4f24b5880e2140e295578748272eb
[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" "4e70e0dcf544f02a1825c4c5bea326403be4f24b5880e2140e295578748272eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e70e0dcf544f02a1825c4c5bea326403be4f24b5880e2140e295578748272eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e70e0dcf544f02a1825c4c5bea326403be4f24b5880e2140e295578748272eb", kill_on_drop: false }`
[INFO] [stdout] 4e70e0dcf544f02a1825c4c5bea326403be4f24b5880e2140e295578748272eb
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1a135700352b46f72c34183012665e3f0a986d1492b1f599ee71a60f1dbc149
[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" "e1a135700352b46f72c34183012665e3f0a986d1492b1f599ee71a60f1dbc149", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling prefix-tree v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "e1a135700352b46f72c34183012665e3f0a986d1492b1f599ee71a60f1dbc149", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1a135700352b46f72c34183012665e3f0a986d1492b1f599ee71a60f1dbc149", kill_on_drop: false }`
[INFO] [stdout] e1a135700352b46f72c34183012665e3f0a986d1492b1f599ee71a60f1dbc149
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0aaf99484b7ea3f7f8a8ef87732ccd426db4fb02a7a869f17e5d8a733e42abff
[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" "0aaf99484b7ea3f7f8a8ef87732ccd426db4fb02a7a869f17e5d8a733e42abff", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling quickcheck v0.9.2
[INFO] [stderr]    Compiling quickcheck_macros v0.9.1
[INFO] [stderr]    Compiling prefix-tree v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 19.17s
[INFO] running `Command { std: "docker" "inspect" "0aaf99484b7ea3f7f8a8ef87732ccd426db4fb02a7a869f17e5d8a733e42abff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aaf99484b7ea3f7f8a8ef87732ccd426db4fb02a7a869f17e5d8a733e42abff", kill_on_drop: false }`
[INFO] [stdout] 0aaf99484b7ea3f7f8a8ef87732ccd426db4fb02a7a869f17e5d8a733e42abff
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] 68d884fae28825dd5b47340175fe1648bdf245fb4ddc0df095807615c448ccb2
[INFO] running `Command { std: "docker" "start" "-a" "68d884fae28825dd5b47340175fe1648bdf245fb4ddc0df095807615c448ccb2", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/prefix_tree-361410c239df03e1
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tree::tests::test_common_prefix ... ok
[INFO] [stdout] test tree::tests::test_find ... ok
[INFO] [stdout] test tree::tests::test_insert ... ok
[INFO] [stdout] test tree::tests::test_find_mut ... ok
[INFO] [stdout] test tree::tests::test_remove ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests prefix-tree
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::new (line 18) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::clear (line 53) ... ok
[INFO] [stdout] test src/set.rs - set::PrefixSet<T>::contains (line 47) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::len (line 170) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::is_empty (line 154) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::iter (line 186) ... ok
[INFO] [stdout] test src/set.rs - set::PrefixSet<T>::clear (line 31) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::remove (line 135) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::get (line 69) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::contains_key (line 34) ... ok
[INFO] [stdout] test src/set.rs - set::PrefixSet<T>::insert (line 66) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::values (line 230) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::insert (line 109) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::get_mut (line 88) ... ok
[INFO] [stdout] test src/set.rs - set::PrefixSet<T>::is_empty (line 105) ... ok
[INFO] [stdout] test src/set.rs - set::PrefixSet<T>::new (line 16) ... ok
[INFO] [stdout] test src/map.rs - map::PrefixMap<K, V>::keys (line 213) ... ok
[INFO] [stdout] test src/set.rs - set::PrefixSet<T>::len (line 121) ... ok
[INFO] [stdout] test src/set.rs - set::PrefixSet<T>::remove (line 86) ... ok
[INFO] [stdout] test src/set.rs - set::PrefixSet<T>::iter (line 137) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "68d884fae28825dd5b47340175fe1648bdf245fb4ddc0df095807615c448ccb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68d884fae28825dd5b47340175fe1648bdf245fb4ddc0df095807615c448ccb2", kill_on_drop: false }`
[INFO] [stdout] 68d884fae28825dd5b47340175fe1648bdf245fb4ddc0df095807615c448ccb2