[INFO] fetching crate slab 0.4.4...
[INFO] testing slab-0.4.4 against 1.55.0 for beta-1.56-1
[INFO] extracting crate slab 0.4.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate slab 0.4.4 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 slab 0.4.4
[INFO] finished tweaking crates.io crate slab 0.4.4
[INFO] tweaked toml for crates.io crate slab 0.4.4 written to /workspace/builds/worker-11/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-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] bbab8b121d97f9376522832ef5152823cf845e0f88fc447132fcbd6487f3e0f9
[INFO] running `Command { std: "docker" "start" "-a" "bbab8b121d97f9376522832ef5152823cf845e0f88fc447132fcbd6487f3e0f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbab8b121d97f9376522832ef5152823cf845e0f88fc447132fcbd6487f3e0f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbab8b121d97f9376522832ef5152823cf845e0f88fc447132fcbd6487f3e0f9", kill_on_drop: false }`
[INFO] [stdout] bbab8b121d97f9376522832ef5152823cf845e0f88fc447132fcbd6487f3e0f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 56d4d01d3d285f48761a1dcb786fac518dfb95eae7fbe3f9b50a0287097ff7d1
[INFO] running `Command { std: "docker" "start" "-a" "56d4d01d3d285f48761a1dcb786fac518dfb95eae7fbe3f9b50a0287097ff7d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling slab v0.4.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "56d4d01d3d285f48761a1dcb786fac518dfb95eae7fbe3f9b50a0287097ff7d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56d4d01d3d285f48761a1dcb786fac518dfb95eae7fbe3f9b50a0287097ff7d1", kill_on_drop: false }`
[INFO] [stdout] 56d4d01d3d285f48761a1dcb786fac518dfb95eae7fbe3f9b50a0287097ff7d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] a6ef2b10c357b0057839449b49b132726faa69ac4490e45c6abcf204a0044b56
[INFO] running `Command { std: "docker" "start" "-a" "a6ef2b10c357b0057839449b49b132726faa69ac4490e45c6abcf204a0044b56", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling serde_test v1.0.130
[INFO] [stderr]    Compiling slab v0.4.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 25.99s
[INFO] running `Command { std: "docker" "inspect" "a6ef2b10c357b0057839449b49b132726faa69ac4490e45c6abcf204a0044b56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6ef2b10c357b0057839449b49b132726faa69ac4490e45c6abcf204a0044b56", kill_on_drop: false }`
[INFO] [stdout] a6ef2b10c357b0057839449b49b132726faa69ac4490e45c6abcf204a0044b56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] ed43d0adb377863867bd39a961f14e57af318d65f3596343b685f2095731541b
[INFO] running `Command { std: "docker" "start" "-a" "ed43d0adb377863867bd39a961f14e57af318d65f3596343b685f2095731541b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.81s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/slab-f35706d35d5bcf24)
[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] [stderr]      Running tests/serde.rs (/opt/rustwide/target/debug/deps/serde-4df44a871b825013)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/slab.rs (/opt/rustwide/target/debug/deps/slab-99dc595681784eff)
[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 42 tests
[INFO] [stdout] test compact_empty ... ok
[INFO] [stdout] test clear ... ok
[INFO] [stdout] test compact_doesnt_move_if_closure_errors ... ok
[INFO] [stdout] test compact_moves_successfully ... ok
[INFO] [stdout] test compact_no_moves_needed ... ok
[INFO] [stdout] test drain_rev ... ok
[INFO] [stdout] test from_iterator_issue_100 ... ok
[INFO] [stdout] test from_iterator_new_in_order ... ok
[INFO] [stdout] test from_iterator_unordered ... ok
[INFO] [stdout] test from_iterator_sorted ... ok
[INFO] [stdout] test fully_consumed_drain ... ok
[INFO] [stdout] test get_vacant_entry_without_using ... ok
[INFO] [stdout] test insert_get_many ... ok
[INFO] [stdout] test insert_get_remove_many ... ok
[INFO] [stdout] test insert_with_vacant_entry ... ok
[INFO] [stdout] test insert_get_remove_one ... ok
[INFO] [stdout] test into_iter ... ok
[INFO] [stdout] test into_iter_rev ... ok
[INFO] [stdout] test iter ... ok
[INFO] [stdout] test iter_mut_rev ... ok
[INFO] [stdout] test iter_mut ... ok
[INFO] [stdout] test iter_rev ... ok
[INFO] [stdout] test key_of_layout_optimizable ... ok
[INFO] [stdout] test key_of_tagged ... ok
[INFO] [stdout] test partially_consumed_drain ... ok
[INFO] [stdout] test key_of_zst ... ok
[INFO] [stdout] test reserve_does_not_allocate_if_available ... ok
[INFO] [stdout] test retain ... ok
[INFO] [stdout] test shrink_to_fit_doesnt_move ... ok
[INFO] [stdout] test shrink_to_fit_doesnt_recreate_list_when_nothing_can_be_done ... ok
[INFO] [stdout] test reserve_exact_does_not_allocate_if_available ... ok
[INFO] [stdout] test shrink_to_fit_empty ... ok
[INFO] [stdout] test shrink_to_fit_no_vacant ... ok
[INFO] [stdout] test slab_get_mut ... ok
[INFO] [stdout] test try_remove ... ok
[INFO] [stdout] test compact_handles_closure_panic ... ok
[INFO] [stdout] test double_remove_panics - should panic ... ok
[INFO] [stdout] test invalid_get_mut_panics - should panic ... ok
[INFO] [stdout] test invalid_get_panics - should panic ... ok
[INFO] [stdout] test invalid_remove_panics - should panic ... ok
[INFO] [stderr]    Doc-tests slab
[INFO] [stdout] test reserve_does_panic_with_capacity_overflow - should panic ... ok
[INFO] [stdout] test reserve_exact_does_panic_with_capacity_overflow - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 42 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 37 tests
[INFO] [stdout] test src/lib.rs - Slab<T>::capacity (line 262) ... ok
[INFO] [stdout] test src/lib.rs - (line 33) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::get (line 649) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::len (line 549) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::contains (line 1021) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::compact (line 442) ... ok
[INFO] [stdout] test src/lib.rs - (line 71) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::compact (line 459) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::key_of (line 860) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T> (line 1189) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::new (line 215) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::remove (line 1004) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::drain (line 1087) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::get_unchecked_mut (line 777) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::retain (line 1047) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::get_unchecked (line 748) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::vacant_entry (line 919) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::insert (line 897) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::reserve (line 290) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::get2_mut (line 699) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::reserve_exact (line 324) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::try_remove (line 964) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::is_empty (line 567) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::iter (line 588) ... ok
[INFO] [stdout] test src/lib.rs - VacantEntry (line 156) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::get_mut (line 671) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::key_of (line 848) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::shrink_to_fit (line 351) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::shrink_to_fit (line 366) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::get2_unchecked_mut (line 811) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::iter_mut (line 619) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T> (line 1177) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::with_capacity (line 235) ... ok
[INFO] [stdout] test src/lib.rs - (line 50) ... ok
[INFO] [stdout] test src/lib.rs - Slab<T>::clear (line 528) ... ok
[INFO] [stdout] test src/lib.rs - VacantEntry::insert (line 1312) ... ok
[INFO] [stdout] test src/lib.rs - VacantEntry::key (line 1342) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 37 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.03s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ed43d0adb377863867bd39a961f14e57af318d65f3596343b685f2095731541b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed43d0adb377863867bd39a961f14e57af318d65f3596343b685f2095731541b", kill_on_drop: false }`
[INFO] [stdout] ed43d0adb377863867bd39a961f14e57af318d65f3596343b685f2095731541b