[INFO] fetching crate dakv_skiplist 0.1.3...
[INFO] testing dakv_skiplist-0.1.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate dakv_skiplist 0.1.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate dakv_skiplist 0.1.3 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dakv_skiplist 0.1.3
[INFO] finished tweaking crates.io crate dakv_skiplist 0.1.3
[INFO] tweaked toml for crates.io crate dakv_skiplist 0.1.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac2853f9675614b8f9f28237854f85265118218ff4e4ea13639ea1a755d61558
[INFO] running `Command { std: "docker" "start" "-a" "ac2853f9675614b8f9f28237854f85265118218ff4e4ea13639ea1a755d61558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac2853f9675614b8f9f28237854f85265118218ff4e4ea13639ea1a755d61558", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac2853f9675614b8f9f28237854f85265118218ff4e4ea13639ea1a755d61558", kill_on_drop: false }`
[INFO] [stdout] ac2853f9675614b8f9f28237854f85265118218ff4e4ea13639ea1a755d61558
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89129f12442001054400abcc485406e5f2c63d4a4975801c360165ef6f834a1e
[INFO] running `Command { std: "docker" "start" "-a" "89129f12442001054400abcc485406e5f2c63d4a4975801c360165ef6f834a1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling dakv_skiplist v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "89129f12442001054400abcc485406e5f2c63d4a4975801c360165ef6f834a1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89129f12442001054400abcc485406e5f2c63d4a4975801c360165ef6f834a1e", kill_on_drop: false }`
[INFO] [stdout] 89129f12442001054400abcc485406e5f2c63d4a4975801c360165ef6f834a1e
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b9f0833559f56313780af8cf650756a743abad29985686c985ac9a999502720
[INFO] running `Command { std: "docker" "start" "-a" "7b9f0833559f56313780af8cf650756a743abad29985686c985ac9a999502720", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling plotters-backend v0.3.2
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling plotters-svg v0.3.1
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling criterion-plot v0.4.4
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling criterion v0.3.5
[INFO] [stderr]    Compiling dakv_skiplist v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 22.38s
[INFO] running `Command { std: "docker" "inspect" "7b9f0833559f56313780af8cf650756a743abad29985686c985ac9a999502720", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b9f0833559f56313780af8cf650756a743abad29985686c985ac9a999502720", kill_on_drop: false }`
[INFO] [stdout] 7b9f0833559f56313780af8cf650756a743abad29985686c985ac9a999502720
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 74a7b7eb42ee5fd50cc27207128cff41819e5b10cc413c7068f2fb6e488a4bf2
[INFO] running `Command { std: "docker" "start" "-a" "74a7b7eb42ee5fd50cc27207128cff41819e5b10cc413c7068f2fb6e488a4bf2", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/dakv_skiplist-2b0944f2fd9a47f8)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test arena::tests::test_alloc ... ok
[INFO] [stdout] test cmp::tests::test_basic ... ok
[INFO] [stdout] test random::tests::test_cmp ... ok
[INFO] [stdout] test skiplist::tests::test_concurrency ... ignored
[INFO] [stdout] test skipnode::tests::test_next ... ok
[INFO] [stdout] test skiplist::tests::test_clear ... ok
[INFO] [stdout] test skiplist::tests::test_basic ... ok
[INFO] [stdout] test skipnode::tests::test_new_node ... ok
[INFO] [stdout] test skiplist_iter::tests::test_basic ... ok
[INFO] [stdout] test skiplist::tests::test_basic_desc ... ok
[INFO] [stdout] test skiplist::tests::test_memory_usage ... ok
[INFO] [stdout] test cmp::tests::test_simplify ... ok
[INFO] [stdout] test skiplist::tests::test_into_iter ... ok
[INFO] [stdout] test skiplist::tests::test_extend ... ok
[INFO] [stderr]    Doc-tests dakv_skiplist
[INFO] [stdout] test arena::tests::test_simple ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.29s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<R, C, A>::clear (line 140) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<R, C, A>::len (line 82) ... ok
[INFO] [stdout] test src/skiplist.rs - skiplist::SkipList<R, C, A>::is_empty (line 102) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.53s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "74a7b7eb42ee5fd50cc27207128cff41819e5b10cc413c7068f2fb6e488a4bf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74a7b7eb42ee5fd50cc27207128cff41819e5b10cc413c7068f2fb6e488a4bf2", kill_on_drop: false }`
[INFO] [stdout] 74a7b7eb42ee5fd50cc27207128cff41819e5b10cc413c7068f2fb6e488a4bf2