[INFO] cloning repository https://github.com/HoNile/stool
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/HoNile/stool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHoNile%2Fstool", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHoNile%2Fstool'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b4bcb9fd7c94034e965c190d7ca531565f22812
[INFO] checking HoNile/stool against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHoNile%2Fstool" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HoNile/stool on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/HoNile/stool
[INFO] finished tweaking git repo https://github.com/HoNile/stool
[INFO] tweaked toml for git repo https://github.com/HoNile/stool written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/HoNile/stool already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/linebender/druid.git`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-macros v1.6.0
[INFO] [stderr]   Downloaded IOKit-sys v0.1.5
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[INFO] [stderr]   Downloaded pangocairo-sys v0.14.0
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[INFO] [stderr]   Downloaded gtk v0.14.3
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[INFO] [stderr]   Downloaded gdk-sys v0.14.0
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[INFO] [stderr]   Downloaded anyhow v1.0.51
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[INFO] [stderr]   Downloaded futures v0.3.18
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[INFO] [stderr]   Downloaded mio-serial v5.0.1
[INFO] [stderr]   Downloaded tokio-serial v5.4.1
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[INFO] [stderr]   Downloaded utf16_lit v2.0.2
[INFO] [stderr]   Downloaded unic-common v0.9.0
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[INFO] [stderr]   Downloaded intl-memoizer v0.5.1
[INFO] [stderr]   Downloaded intl_pluralrules v7.0.1
[INFO] [stderr]   Downloaded self_cell v0.10.2
[INFO] [stderr]   Downloaded fluent-langneg v0.13.0
[INFO] [stderr]   Downloaded serialport v4.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac7002c517d6f0ae84699ee7c19d163849d94587e66f1563c617e70dda7135c3
[INFO] running `Command { std: "docker" "start" "-a" "ac7002c517d6f0ae84699ee7c19d163849d94587e66f1563c617e70dda7135c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac7002c517d6f0ae84699ee7c19d163849d94587e66f1563c617e70dda7135c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac7002c517d6f0ae84699ee7c19d163849d94587e66f1563c617e70dda7135c3", kill_on_drop: false }`
[INFO] [stdout] ac7002c517d6f0ae84699ee7c19d163849d94587e66f1563c617e70dda7135c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 926cd5737aeeeca2d5215594dc35cece67d86141db44eaa584ad1fef77a73a7f
[INFO] running `Command { std: "docker" "start" "-a" "926cd5737aeeeca2d5215594dc35cece67d86141db44eaa584ad1fef77a73a7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.33
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling serde v1.0.131
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling smallvec v1.7.0
[INFO] [stderr]    Compiling pkg-config v0.3.23
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling cfg-expr v0.8.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling strum v0.21.0
[INFO] [stderr]    Compiling version-compare v0.0.11
[INFO] [stderr]    Compiling libc v0.2.109
[INFO] [stderr]    Compiling futures-core v0.3.18
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling futures-channel v0.3.18
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking futures-sink v0.3.18
[INFO] [stderr]    Compiling futures-task v0.3.18
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling futures-util v0.3.18
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking futures-io v0.3.18
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling gio v0.14.8
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking tinystr v0.3.4
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking unic-ucd-bidi v0.9.0
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]     Checking unic-langid-impl v0.9.0
[INFO] [stderr]     Checking unic-bidi v0.9.0
[INFO] [stderr]     Checking kurbo v0.8.2
[INFO] [stderr]     Checking unic-langid v0.9.0
[INFO] [stderr]     Checking tracing-core v0.1.21
[INFO] [stderr]    Compiling tokio v1.14.0
[INFO] [stderr]    Compiling gtk v0.14.3
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking xi-unicode v0.3.0
[INFO] [stderr]     Checking type-map v0.4.0
[INFO] [stderr]     Checking piet v0.5.0
[INFO] [stderr]    Compiling druid-shell v0.7.0 (https://github.com/linebender/druid.git#14fd8fde)
[INFO] [stderr]     Checking intl-memoizer v0.5.1
[INFO] [stderr]     Checking nix v0.22.0
[INFO] [stderr]     Checking time v0.3.5
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]     Checking intl_pluralrules v7.0.1
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking fluent-langneg v0.13.0
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking keyboard-types v0.6.2
[INFO] [stderr]    Compiling field-offset v0.3.4
[INFO] [stderr]     Checking self_cell v0.10.2
[INFO] [stderr]     Checking tracing-subscriber v0.3.3
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]     Checking serialport v4.0.1
[INFO] [stderr]     Checking mio-serial v5.0.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]    Compiling futures-macro v0.3.18
[INFO] [stderr]    Compiling tokio-macros v1.6.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.18
[INFO] [stderr]    Compiling druid-derive v0.4.0 (https://github.com/linebender/druid.git#14fd8fde)
[INFO] [stderr]     Checking tracing v0.1.29
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]     Checking fluent-syntax v0.11.0
[INFO] [stderr]    Compiling system-deps v3.2.0
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling glib-macros v0.14.1
[INFO] [stderr]    Compiling gtk3-macros v0.14.0
[INFO] [stderr]     Checking fluent-bundle v0.15.2
[INFO] [stderr]    Compiling glib-sys v0.14.0
[INFO] [stderr]    Compiling gobject-sys v0.14.0
[INFO] [stderr]    Compiling pango-sys v0.14.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.14.9
[INFO] [stderr]    Compiling gio-sys v0.14.0
[INFO] [stderr]    Compiling gdk-pixbuf-sys v0.14.0
[INFO] [stderr]    Compiling atk-sys v0.14.0
[INFO] [stderr]    Compiling gdk-sys v0.14.0
[INFO] [stderr]    Compiling pangocairo-sys v0.14.0
[INFO] [stderr]    Compiling gtk-sys v0.14.0
[INFO] [stderr]     Checking tokio-util v0.6.9
[INFO] [stderr]     Checking futures-executor v0.3.18
[INFO] [stderr]     Checking glib v0.14.8
[INFO] [stderr]     Checking futures v0.3.18
[INFO] [stderr]     Checking tokio-serial v5.4.1
[INFO] [stderr]     Checking cairo-rs v0.14.9
[INFO] [stderr]     Checking pango v0.14.8
[INFO] [stderr]     Checking atk v0.14.0
[INFO] [stderr]     Checking pangocairo v0.14.0
[INFO] [stderr]     Checking piet-cairo v0.5.0
[INFO] [stderr]     Checking piet-common v0.5.0
[INFO] [stderr]     Checking gdk-pixbuf v0.14.0
[INFO] [stderr]     Checking gdk v0.14.3
[INFO] [stderr]     Checking druid v0.7.0 (https://github.com/linebender/druid.git#14fd8fde)
[INFO] [stderr]     Checking stool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `tokio_serial` is imported redundantly
[INFO] [stdout]   --> src/widgets/controllers.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use tokio_serial;
[INFO] [stdout]    |     ^^^^^^^^^^^^ the item `tokio_serial` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio_serial` is imported redundantly
[INFO] [stdout]   --> src/widgets/controllers.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use tokio_serial;
[INFO] [stdout]    |     ^^^^^^^^^^^^ the item `tokio_serial` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 51s
[INFO] running `Command { std: "docker" "inspect" "926cd5737aeeeca2d5215594dc35cece67d86141db44eaa584ad1fef77a73a7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "926cd5737aeeeca2d5215594dc35cece67d86141db44eaa584ad1fef77a73a7f", kill_on_drop: false }`
[INFO] [stdout] 926cd5737aeeeca2d5215594dc35cece67d86141db44eaa584ad1fef77a73a7f
[INFO] checking HoNile/stool against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHoNile%2Fstool" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/HoNile/stool on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/HoNile/stool
[INFO] finished tweaking git repo https://github.com/HoNile/stool
[INFO] tweaked toml for git repo https://github.com/HoNile/stool written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/HoNile/stool already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7b43e4bb9266faea88e181cb1537a523566c21d6f8d5e2b82be71327ad0bbea
[INFO] running `Command { std: "docker" "start" "-a" "d7b43e4bb9266faea88e181cb1537a523566c21d6f8d5e2b82be71327ad0bbea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7b43e4bb9266faea88e181cb1537a523566c21d6f8d5e2b82be71327ad0bbea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7b43e4bb9266faea88e181cb1537a523566c21d6f8d5e2b82be71327ad0bbea", kill_on_drop: false }`
[INFO] [stdout] d7b43e4bb9266faea88e181cb1537a523566c21d6f8d5e2b82be71327ad0bbea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 661de9f3284581ffe78bb523358b3a7a0a9e7654b998bf0d3d3280ff3a1bb9d7
[INFO] running `Command { std: "docker" "start" "-a" "661de9f3284581ffe78bb523358b3a7a0a9e7654b998bf0d3d3280ff3a1bb9d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.33
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[INFO] [stdout] warning: the item `tokio_serial` is imported redundantly
[INFO] [stdout]   --> src/widgets/controllers.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use tokio_serial;
[INFO] [stdout]    |     ^^^^^^^^^^^^ the item `tokio_serial` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio_serial` is imported redundantly
[INFO] [stdout]   --> src/widgets/controllers.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use tokio_serial;
[INFO] [stdout]    |     ^^^^^^^^^^^^ the item `tokio_serial` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 41s
[INFO] running `Command { std: "docker" "inspect" "661de9f3284581ffe78bb523358b3a7a0a9e7654b998bf0d3d3280ff3a1bb9d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "661de9f3284581ffe78bb523358b3a7a0a9e7654b998bf0d3d3280ff3a1bb9d7", kill_on_drop: false }`
[INFO] [stdout] 661de9f3284581ffe78bb523358b3a7a0a9e7654b998bf0d3d3280ff3a1bb9d7