[INFO] fetching crate scanmut 0.1.0...
[INFO] testing scanmut-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate scanmut 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate scanmut 0.1.0 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 scanmut 0.1.0
[INFO] finished tweaking crates.io crate scanmut 0.1.0
[INFO] tweaked toml for crates.io crate scanmut 0.1.0 written to /workspace/builds/worker-6/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-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" "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] a84fc1515a3ab8f577586146f390c412e1a5882829d9e85f7efda427efdd8e26
[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" "a84fc1515a3ab8f577586146f390c412e1a5882829d9e85f7efda427efdd8e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a84fc1515a3ab8f577586146f390c412e1a5882829d9e85f7efda427efdd8e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a84fc1515a3ab8f577586146f390c412e1a5882829d9e85f7efda427efdd8e26", kill_on_drop: false }`
[INFO] [stdout] a84fc1515a3ab8f577586146f390c412e1a5882829d9e85f7efda427efdd8e26
[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" "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] 437882f4e99f50fcefaaa82337cb14501e21376b7df1384ff4a9d3501669c6f6
[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" "437882f4e99f50fcefaaa82337cb14501e21376b7df1384ff4a9d3501669c6f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling scanmut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:428:32
[INFO] [stdout]     |
[INFO] [stdout] 428 |         I: IntoIterator<Item = (usize)>,
[INFO] [stdout]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:452:32
[INFO] [stdout]     |
[INFO] [stdout] 452 |         I: IntoIterator<Item = (usize)>,
[INFO] [stdout]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "437882f4e99f50fcefaaa82337cb14501e21376b7df1384ff4a9d3501669c6f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "437882f4e99f50fcefaaa82337cb14501e21376b7df1384ff4a9d3501669c6f6", kill_on_drop: false }`
[INFO] [stdout] 437882f4e99f50fcefaaa82337cb14501e21376b7df1384ff4a9d3501669c6f6
[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" "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] 2f2bf88f927f877d8cab414f93d95d60dbb39089a06892a6d8af4e8adfebd5e7
[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" "2f2bf88f927f877d8cab414f93d95d60dbb39089a06892a6d8af4e8adfebd5e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling half v1.6.0
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:428:32
[INFO] [stdout]     |
[INFO] [stdout] 428 |         I: IntoIterator<Item = (usize)>,
[INFO] [stdout]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:452:32
[INFO] [stdout]     |
[INFO] [stdout] 452 |         I: IntoIterator<Item = (usize)>,
[INFO] [stdout]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling tinytemplate v1.2.0
[INFO] [stderr]    Compiling plotters v0.2.15
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.1
[INFO] [stderr]    Compiling bstr v0.2.14
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling csv v1.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling criterion v0.3.3
[INFO] [stderr]    Compiling scanmut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:428:32
[INFO] [stdout]     |
[INFO] [stdout] 428 |         I: IntoIterator<Item = (usize)>,
[INFO] [stdout]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:452:32
[INFO] [stdout]     |
[INFO] [stdout] 452 |         I: IntoIterator<Item = (usize)>,
[INFO] [stdout]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1m 08s
[INFO] running `Command { std: "docker" "inspect" "2f2bf88f927f877d8cab414f93d95d60dbb39089a06892a6d8af4e8adfebd5e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f2bf88f927f877d8cab414f93d95d60dbb39089a06892a6d8af4e8adfebd5e7", kill_on_drop: false }`
[INFO] [stdout] 2f2bf88f927f877d8cab414f93d95d60dbb39089a06892a6d8af4e8adfebd5e7
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 90a7ed108e0983572c6995e8c903cf3ad5911fabf12aada819f5b00679f9c9bd
[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" "90a7ed108e0983572c6995e8c903cf3ad5911fabf12aada819f5b00679f9c9bd", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:428:32
[INFO] [stderr]     |
[INFO] [stderr] 428 |         I: IntoIterator<Item = (usize)>,
[INFO] [stderr]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:452:32
[INFO] [stderr]     |
[INFO] [stderr] 452 |         I: IntoIterator<Item = (usize)>,
[INFO] [stderr]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:428:32
[INFO] [stderr]     |
[INFO] [stderr] 428 |         I: IntoIterator<Item = (usize)>,
[INFO] [stderr]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:452:32
[INFO] [stderr]     |
[INFO] [stderr] 452 |         I: IntoIterator<Item = (usize)>,
[INFO] [stderr]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.27s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/scanmut-68ac9023e3d79c0f
[INFO] [stdout] 
[INFO] [stdout] running 32 tests
[INFO] [stdout] test tests::inserter_leak ... ok
[INFO] [stdout] test tests::inserter_single_post ... ok
[INFO] [stdout] test tests::inserter_empty ... ok
[INFO] [stdout] test tests::inserter_slices ... ok
[INFO] [stdout] test tests::inserter_max_index ... ok
[INFO] [stdout] test tests::inserter_single_pre ... ok
[INFO] [stdout] test tests::inserter_threes ... ok
[INFO] [stdout] test tests::multimutate_multiple_insert ... ok
[INFO] [stdout] test tests::multimutate_single_insert ... ok
[INFO] [stdout] test tests::multimutate_single_insert_mid ... ok
[INFO] [stdout] test tests::inserter_threes_additional_cap ... ok
[INFO] [stdout] test tests::multimutate_single_insert_pre ... ok
[INFO] [stdout] test tests::multimutate_single_insert_post ... ok
[INFO] [stdout] test tests::multimutate_single_insert_zero_sized ... ok
[INFO] [stdout] test tests::remover_single ... ok
[INFO] [stdout] test tests::remover_index ... ok
[INFO] [stdout] test tests::remover_len ... ok
[INFO] [stdout] test tests::remover_two_second ... ok
[INFO] [stdout] test tests::remover_two_both ... ok
[INFO] [stdout] test tests::remover_slices ... ok
[INFO] [stdout] test tests::remover_two_first ... ok
[INFO] [stdout] test tests::remover_advance_one_past ... ok
[INFO] [stdout] test tests::remover_empty ... ok
[INFO] [stdout] test tests::inserter_advance_oob ... ok
[INFO] [stdout] test tests::inserter_oob ... ok
[INFO] [stdout] test tests::inserter_out_of_order ... ok
[INFO] [stdout] test tests::multimutate_remove ... ok
[INFO] [stderr]    Doc-tests scanmut
[INFO] [stdout] test tests::remover_advance_out_of_bounds ... ok
[INFO] [stdout] test tests::remover_out_of_bounds ... ok
[INFO] [stdout] test tests::remover_two_out_of_order ... ok
[INFO] [stdout] test tests::multimutate_single_insert_out_of_bounds ... ok
[INFO] [stdout] test tests::multimutate_single_insert_zero_sized_out_of_bounds ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 32 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:428:32
[INFO] [stderr]     |
[INFO] [stderr] 428 |         I: IntoIterator<Item = (usize)>,
[INFO] [stderr]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:452:32
[INFO] [stderr]     |
[INFO] [stderr] 452 |         I: IntoIterator<Item = (usize)>,
[INFO] [stderr]     |                                ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - (line 13) ... ok
[INFO] [stdout] test src/lib.rs - Remover (line 225) ... ok
[INFO] [stdout] test src/lib.rs - ScanMut::multi_remove (line 412) ... ok
[INFO] [stdout] test src/lib.rs - Inserter (line 50) ... ok
[INFO] [stdout] test src/lib.rs - ScanMut::multi_insert (line 385) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "90a7ed108e0983572c6995e8c903cf3ad5911fabf12aada819f5b00679f9c9bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90a7ed108e0983572c6995e8c903cf3ad5911fabf12aada819f5b00679f9c9bd", kill_on_drop: false }`
[INFO] [stdout] 90a7ed108e0983572c6995e8c903cf3ad5911fabf12aada819f5b00679f9c9bd