[INFO] fetching crate scanmut 0.2.0...
[INFO] testing scanmut-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate scanmut 0.2.0 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate scanmut 0.2.0 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 scanmut 0.2.0
[INFO] finished tweaking crates.io crate scanmut 0.2.0
[INFO] tweaked toml for crates.io crate scanmut 0.2.0 written to /workspace/builds/worker-72/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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] d408c945d77df1c4a14acd0b5f680438f8497ec9cbbc69d8c3c3f0a9f5e90a2e
[INFO] running `Command { std: "docker" "start" "-a" "d408c945d77df1c4a14acd0b5f680438f8497ec9cbbc69d8c3c3f0a9f5e90a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d408c945d77df1c4a14acd0b5f680438f8497ec9cbbc69d8c3c3f0a9f5e90a2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d408c945d77df1c4a14acd0b5f680438f8497ec9cbbc69d8c3c3f0a9f5e90a2e", kill_on_drop: false }`
[INFO] [stdout] d408c945d77df1c4a14acd0b5f680438f8497ec9cbbc69d8c3c3f0a9f5e90a2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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] eb294ca44e5cadbec8fc267b115a7eaca52932db3c94437028a78deeb651bf86
[INFO] running `Command { std: "docker" "start" "-a" "eb294ca44e5cadbec8fc267b115a7eaca52932db3c94437028a78deeb651bf86", kill_on_drop: false }`
[INFO] [stderr]    Compiling scanmut v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `Command { std: "docker" "inspect" "eb294ca44e5cadbec8fc267b115a7eaca52932db3c94437028a78deeb651bf86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb294ca44e5cadbec8fc267b115a7eaca52932db3c94437028a78deeb651bf86", kill_on_drop: false }`
[INFO] [stdout] eb294ca44e5cadbec8fc267b115a7eaca52932db3c94437028a78deeb651bf86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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] 861a3982f685307144f247584359bd127f547da81849e0aab5c7d609175661b8
[INFO] running `Command { std: "docker" "start" "-a" "861a3982f685307144f247584359bd127f547da81849e0aab5c7d609175661b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling plotters-backend v0.3.2
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling plotters-svg v0.3.1
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling criterion-plot v0.4.4
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling proptest v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling criterion v0.3.5
[INFO] [stderr]    Compiling scanmut v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 29.15s
[INFO] running `Command { std: "docker" "inspect" "861a3982f685307144f247584359bd127f547da81849e0aab5c7d609175661b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "861a3982f685307144f247584359bd127f547da81849e0aab5c7d609175661b8", kill_on_drop: false }`
[INFO] [stdout] 861a3982f685307144f247584359bd127f547da81849e0aab5c7d609175661b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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] 5e380ae34ab268e215009f527e97cdd7289bbb93be931d8e53052bfc144854bf
[INFO] running `Command { std: "docker" "start" "-a" "5e380ae34ab268e215009f527e97cdd7289bbb93be931d8e53052bfc144854bf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.25s
[INFO] [stdout] running 37 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/scanmut-777853b83f84bc79)
[INFO] [stdout] test inserter::tests::inserter_max_index ... ok
[INFO] [stdout] test inserter::tests::inserter_single_post ... ok
[INFO] [stdout] test inserter::tests::inserter_single_pre ... ok
[INFO] [stdout] test inserter::tests::inserter_slices ... ok
[INFO] [stdout] test inserter::tests::inserter_empty ... ok
[INFO] [stdout] test remover::tests::remover_two_both ... ok
[INFO] [stdout] test remover::tests::remover_two_first ... ok
[INFO] [stdout] test remover::tests::remover_two_second ... ok
[INFO] [stdout] test tests::insert_all ... ok
[INFO] [stdout] test tests::insert_all_end ... ok
[INFO] [stdout] test tests::insert_all_rev ... ok
[INFO] [stdout] test tests::insert_all_rev_end ... ok
[INFO] [stdout] test tests::insert_slice_clone ... ok
[INFO] [stdout] test tests::insert_slice_copy ... 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::multimutate_single_insert_post ... ok
[INFO] [stdout] test tests::multimutate_single_insert_pre ... ok
[INFO] [stdout] test tests::multimutate_single_insert_zero_sized ... ok
[INFO] [stdout] test remover::tests::remover_single ... ok
[INFO] [stdout] test remover::tests::remover_index ... ok
[INFO] [stdout] test remover::tests::remover_empty ... ok
[INFO] [stdout] test remover::tests::remover_slices ... ok
[INFO] [stdout] test inserter::tests::inserter_threes ... ok
[INFO] [stdout] test remover::tests::remover_advance_one_past ... ok
[INFO] [stdout] test inserter::tests::inserter_threes_additional_cap ... ok
[INFO] [stdout] test inserter::tests::inserter_oob - should panic ... ok
[INFO] [stdout] test remover::tests::remover_two_out_of_order - should panic ... ok
[INFO] [stdout] test tests::multimutate_remove - should panic ... ok
[INFO] [stdout] test tests::multimutate_single_insert_out_of_bounds - should panic ... ok
[INFO] [stdout] test tests::multimutate_single_insert_zero_sized_out_of_bounds - should panic ... ok
[INFO] [stdout] test remover::tests::remover_out_of_bounds - should panic ... ok
[INFO] [stdout] test remover::tests::remover_advance_out_of_bounds - should panic ... ok
[INFO] [stdout] test inserter::tests::inserter_out_of_order - should panic ... ok
[INFO] [stdout] test remover::tests::equals_naive_remover ... ok
[INFO] [stdout] test inserter::tests::equals_naive_inserter ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 37 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 9.92s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests scanmut
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/inserter.rs - inserter::Inserter (line 40) ... ok
[INFO] [stdout] test src/lib.rs - ScanMut::multi_remove (line 94) ... ok
[INFO] [stdout] test src/inserter.rs - inserter::Inserter (line 20) ... ok
[INFO] [stdout] test src/lib.rs - ScanMut::multi_insert (line 67) ... ok
[INFO] [stdout] test src/lib.rs - (line 28) ... ok
[INFO] [stdout] test src/remover.rs - remover::Remover (line 45) ... ok
[INFO] [stdout] test src/lib.rs - (line 18) ... ok
[INFO] [stdout] test src/remover.rs - remover::Remover (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.99s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5e380ae34ab268e215009f527e97cdd7289bbb93be931d8e53052bfc144854bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e380ae34ab268e215009f527e97cdd7289bbb93be931d8e53052bfc144854bf", kill_on_drop: false }`
[INFO] [stdout] 5e380ae34ab268e215009f527e97cdd7289bbb93be931d8e53052bfc144854bf