[INFO] fetching crate blossom 0.4.0...
[INFO] testing blossom-0.4.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate blossom 0.4.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate blossom 0.4.0 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 blossom 0.4.0
[INFO] finished tweaking crates.io crate blossom 0.4.0
[INFO] tweaked toml for crates.io crate blossom 0.4.0 written to /workspace/builds/worker-8/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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 7f5099c1c62f0a9cdec6431edc38efb50dc6d2e91df41606aa720a4d7c0b42e7
[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" "7f5099c1c62f0a9cdec6431edc38efb50dc6d2e91df41606aa720a4d7c0b42e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f5099c1c62f0a9cdec6431edc38efb50dc6d2e91df41606aa720a4d7c0b42e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f5099c1c62f0a9cdec6431edc38efb50dc6d2e91df41606aa720a4d7c0b42e7", kill_on_drop: false }`
[INFO] [stdout] 7f5099c1c62f0a9cdec6431edc38efb50dc6d2e91df41606aa720a4d7c0b42e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 622e51d5057b1f2f2fa394b912b50e3d064e17ce82a8222f7e1e7d0e2b71231f
[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" "622e51d5057b1f2f2fa394b912b50e3d064e17ce82a8222f7e1e7d0e2b71231f", kill_on_drop: false }`
[INFO] [stderr]    Compiling blossom v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.69s
[INFO] running `Command { std: "docker" "inspect" "622e51d5057b1f2f2fa394b912b50e3d064e17ce82a8222f7e1e7d0e2b71231f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "622e51d5057b1f2f2fa394b912b50e3d064e17ce82a8222f7e1e7d0e2b71231f", kill_on_drop: false }`
[INFO] [stdout] 622e51d5057b1f2f2fa394b912b50e3d064e17ce82a8222f7e1e7d0e2b71231f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] fa86adaa63caaae2fb77d18a024aeabc91da7b86964d3010e9d93b2ff0efdf16
[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" "fa86adaa63caaae2fb77d18a024aeabc91da7b86964d3010e9d93b2ff0efdf16", kill_on_drop: false }`
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling half v1.6.0
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling plotters v0.2.15
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling tinytemplate v1.2.0
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling csv v1.1.5
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling criterion v0.3.3
[INFO] [stderr]    Compiling blossom v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 46.91s
[INFO] running `Command { std: "docker" "inspect" "fa86adaa63caaae2fb77d18a024aeabc91da7b86964d3010e9d93b2ff0efdf16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa86adaa63caaae2fb77d18a024aeabc91da7b86964d3010e9d93b2ff0efdf16", kill_on_drop: false }`
[INFO] [stdout] fa86adaa63caaae2fb77d18a024aeabc91da7b86964d3010e9d93b2ff0efdf16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 625a6dd269386d29218d7fecb2b96bae5148e433092fa89c0563b099eb8e7dc2
[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" "625a6dd269386d29218d7fecb2b96bae5148e433092fa89c0563b099eb8e7dc2", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/blossom-1d54b1c8ec0da439
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test graph::contract_take_edge_from_leaf ... ok
[INFO] [stdout] test graph::find_augmenting_path_maybe_blossom1 ... ok
[INFO] [stdout] test graph::find_augmenting_path_maybe_blossom2 ... ok
[INFO] [stdout] test graph::find_augmenting_path_one ... ok
[INFO] [stdout] test graph::find_augmenting_path_two ... ok
[INFO] [stdout] test graph::find_match_four ... ok
[INFO] [stdout] test graph::find_match_one ... ok
[INFO] [stdout] test graph::find_match_two ... ok
[INFO] [stdout] test graph::contract ... ok
[INFO] [stdout] test graph::lift_left ... ok
[INFO] [stdout] test connect::two_groups ... ok
[INFO] [stdout] test graph::lift_order ... ok
[INFO] [stdout] test graph::lift_right ... ok
[INFO] [stdout] test graph::lift_root ... ok
[INFO] [stdout] test weighted::find_match_dense ... ok
[INFO] [stdout] test weighted::find_match_sparse ... ok
[INFO] [stdout] test graph::bench::test_random_10 ... ok
[INFO] [stdout] test graph::bench::test_random_12 ... ok
[INFO] [stdout] test graph::bench::test_random_100 ... ok
[INFO] [stderr]    Doc-tests blossom
[INFO] [stdout] test graph::bench::test_random_1000 ... 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 src/graph.rs - graph::AnnotatedGraph<Annotation>::new (line 38) ... ok
[INFO] [stdout] test src/graph.rs - graph::AnnotatedGraph<Annotation>::maximum_matching (line 237) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "625a6dd269386d29218d7fecb2b96bae5148e433092fa89c0563b099eb8e7dc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "625a6dd269386d29218d7fecb2b96bae5148e433092fa89c0563b099eb8e7dc2", kill_on_drop: false }`
[INFO] [stdout] 625a6dd269386d29218d7fecb2b96bae5148e433092fa89c0563b099eb8e7dc2