[INFO] fetching crate mset 0.0.4...
[INFO] testing mset-0.0.4 against 1.49.0 for beta-1.50-1
[INFO] extracting crate mset 0.0.4 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate mset 0.0.4 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 mset 0.0.4
[INFO] finished tweaking crates.io crate mset 0.0.4
[INFO] tweaked toml for crates.io crate mset 0.0.4 written to /workspace/builds/worker-1/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-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 856b6f6a13a6f8d39ff5b64451e47ac956fd0384c67c4738463605e1434d3dff
[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" "856b6f6a13a6f8d39ff5b64451e47ac956fd0384c67c4738463605e1434d3dff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "856b6f6a13a6f8d39ff5b64451e47ac956fd0384c67c4738463605e1434d3dff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "856b6f6a13a6f8d39ff5b64451e47ac956fd0384c67c4738463605e1434d3dff", kill_on_drop: false }`
[INFO] [stdout] 856b6f6a13a6f8d39ff5b64451e47ac956fd0384c67c4738463605e1434d3dff
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 298d8839befc0a2f01d1bb2fe39f5abada9e63ad3c3d9cd358cca228c5713b64
[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" "298d8839befc0a2f01d1bb2fe39f5abada9e63ad3c3d9cd358cca228c5713b64", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mset v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "298d8839befc0a2f01d1bb2fe39f5abada9e63ad3c3d9cd358cca228c5713b64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "298d8839befc0a2f01d1bb2fe39f5abada9e63ad3c3d9cd358cca228c5713b64", kill_on_drop: false }`
[INFO] [stdout] 298d8839befc0a2f01d1bb2fe39f5abada9e63ad3c3d9cd358cca228c5713b64
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b1b4fb45f1ba20d47017a6c76c3d67ecb48014ab9b00b13ae635be68e79a0b4
[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" "2b1b4fb45f1ba20d47017a6c76c3d67ecb48014ab9b00b13ae635be68e79a0b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling mset v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.22s
[INFO] running `Command { std: "docker" "inspect" "2b1b4fb45f1ba20d47017a6c76c3d67ecb48014ab9b00b13ae635be68e79a0b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b1b4fb45f1ba20d47017a6c76c3d67ecb48014ab9b00b13ae635be68e79a0b4", kill_on_drop: false }`
[INFO] [stdout] 2b1b4fb45f1ba20d47017a6c76c3d67ecb48014ab9b00b13ae635be68e79a0b4
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 723977cdd3ad1d922520eeed975488aa2de07aaacafda32bfe356b7c4c6ecd9a
[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" "723977cdd3ad1d922520eeed975488aa2de07aaacafda32bfe356b7c4c6ecd9a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.91s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mset-df924a01d0aa1da0
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test test_mset::test_difference ... ok
[INFO] [stdout] test test_mset::test_intersection ... ok
[INFO] [stdout] test test_mset::test_iterator_over_element_counts ... ok
[INFO] [stdout] test test_mset::test_symmetric_difference ... ok
[INFO] [stdout] test test_mset::test_move_iter ... ok
[INFO] [stdout] test test_mset::test_drain_trivial ... ok
[INFO] [stdout] test test_mset::test_retain ... ok
[INFO] [stdout] test test_mset::test_zero_capacity ... ok
[INFO] [stdout] test test_mset::test_show_nontrivial ... ok
[INFO] [stdout] test test_mset::test_union ... ok
[INFO] [stdout] test test_mset::test_mset_clear ... ok
[INFO] [stdout] test test_mset::test_drain_nontrivial ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/version_numbers-c220aa94e940d924
[INFO] [stdout] test test_mset::test_insert_and_retrieve_elements ... ok
[INFO] [stdout] test test_mset::test_extend_ref ... ok
[INFO] [stdout] test test_mset::test_disjoint ... ok
[INFO] [stdout] test test_mset::test_show_trivial ... ok
[INFO] [stdout] test test_mset::test_subset_and_superset ... ok
[INFO] [stdout] test test_mset::test_iterator_over_elements ... ok
[INFO] [stdout] test test_mset::test_retrieving_mset_values ... ok
[INFO] [stdout] test test_mset::test_eq ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_readme_deps ... ok
[INFO] [stderr]    Doc-tests mset
[INFO] [stdout] test test_html_root_url ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 40 tests
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::capacity (line 182) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::element_counts (line 197) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, RandomState>::new (line 143) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, RandomState>::with_capacity (line 164) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::elements (line 219) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::contains (line 838) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet (line 90) ... ok
[INFO] [stdout] test src/lib.rs - &'_ MultiSet<T, S>::bitand (line 980) ... ok
[INFO] [stdout] test src/lib.rs - &'_ MultiSet<T, S>::bitor (line 948) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet (line 114) ... ok
[INFO] [stdout] test src/lib.rs - &'_ MultiSet<T, S>::sub (line 1043) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet (line 55) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::drain (line 701) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::difference (line 725) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::clear (line 281) ... ok
[INFO] [stdout] test src/lib.rs - &'_ MultiSet<T, S>::bitxor (line 1013) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::insert_times (line 557) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::get (line 866) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::is_subset (line 481) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::is_empty (line 263) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::get_element_multiplicity (line 888) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::hasher (line 348) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::insert (line 535) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::is_superset (line 505) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::is_disjoint (line 455) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::iter_with_multiplicity (line 432) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::len (line 243) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::intersection (line 785) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::shrink_to_fit (line 388) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::remove (line 587) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::remove_times (line 617) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::reserve (line 372) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::with_capacity_and_hasher (line 328) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::retain (line 681) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::iter (line 410) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::with_hasher (line 306) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T> (line 910) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::symmetric_difference (line 757) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::take (line 660) ... ok
[INFO] [stdout] test src/lib.rs - MultiSet<T, S>::union (line 813) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 40 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "723977cdd3ad1d922520eeed975488aa2de07aaacafda32bfe356b7c4c6ecd9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "723977cdd3ad1d922520eeed975488aa2de07aaacafda32bfe356b7c4c6ecd9a", kill_on_drop: false }`
[INFO] [stdout] 723977cdd3ad1d922520eeed975488aa2de07aaacafda32bfe356b7c4c6ecd9a