[INFO] fetching crate libcnb-test 0.16.0...
[INFO] checking libcnb-test-0.16.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate libcnb-test 0.16.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate libcnb-test 0.16.0 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 crates.io crate libcnb-test 0.16.0
[INFO] finished tweaking crates.io crate libcnb-test 0.16.0
[INFO] tweaked toml for crates.io crate libcnb-test 0.16.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 97 packages
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding fancy-regex v0.12.0 (latest: v0.13.0)
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding libcnb v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding libcnb-common v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding libcnb-data v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding libcnb-package v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding libcnb-proc-macros v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding which v5.0.0 (latest: v6.0.1)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded libcnb-common v0.16.0
[INFO] [stderr]   Downloaded libcnb-package v0.16.0
[INFO] [stderr]   Downloaded libcnb-proc-macros v0.16.0
[INFO] [stderr]   Downloaded libcnb-data v0.16.0
[INFO] [stderr]   Downloaded indoc v2.0.5
[INFO] [stderr]   Downloaded fancy-regex v0.12.0
[INFO] [stderr]   Downloaded libcnb v0.16.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 3f2f15213efa64008b65b0dd7d65a13a0058f75112a4088552ca64a5aa8c690e
[INFO] running `Command { std: "docker" "start" "-a" "3f2f15213efa64008b65b0dd7d65a13a0058f75112a4088552ca64a5aa8c690e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f2f15213efa64008b65b0dd7d65a13a0058f75112a4088552ca64a5aa8c690e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f2f15213efa64008b65b0dd7d65a13a0058f75112a4088552ca64a5aa8c690e", kill_on_drop: false }`
[INFO] [stdout] 3f2f15213efa64008b65b0dd7d65a13a0058f75112a4088552ca64a5aa8c690e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 16ffcfd59db21af146bc524ea4db8474512f5ae0a37462983de291127007f1b2
[INFO] running `Command { std: "docker" "start" "-a" "16ffcfd59db21af146bc524ea4db8474512f5ae0a37462983de291127007f1b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]    Compiling camino v1.1.6
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]    Compiling ryu v1.0.17
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]     Checking winnow v0.6.5
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking uriparse v0.6.4
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]     Checking home v0.5.9
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking fs_extra v1.3.0
[INFO] [stderr]     Checking ureq v2.9.6
[INFO] [stderr]    Compiling indoc v2.0.5
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking which v5.0.0
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking globset v0.4.14
[INFO] [stderr]     Checking ignore v0.4.22
[INFO] [stderr]     Checking fancy-regex v0.12.0
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking cargo-platform v0.1.8
[INFO] [stderr]     Checking toml_edit v0.22.9
[INFO] [stderr]     Checking cargo_metadata v0.18.1
[INFO] [stderr]     Checking toml v0.8.12
[INFO] [stderr]     Checking libcnb-common v0.16.0
[INFO] [stderr]    Compiling libcnb-proc-macros v0.16.0
[INFO] [stderr]     Checking libcnb-data v0.16.0
[INFO] [stderr]     Checking libcnb-package v0.16.0
[INFO] [stderr]     Checking libcnb v0.16.0
[INFO] [stderr]     Checking libcnb-test v0.16.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.74s
[INFO] running `Command { std: "docker" "inspect" "16ffcfd59db21af146bc524ea4db8474512f5ae0a37462983de291127007f1b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16ffcfd59db21af146bc524ea4db8474512f5ae0a37462983de291127007f1b2", kill_on_drop: false }`
[INFO] [stdout] 16ffcfd59db21af146bc524ea4db8474512f5ae0a37462983de291127007f1b2
[INFO] checking libcnb-test-0.16.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate libcnb-test 0.16.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate libcnb-test 0.16.0 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 crates.io crate libcnb-test 0.16.0
[INFO] finished tweaking crates.io crate libcnb-test 0.16.0
[INFO] tweaked toml for crates.io crate libcnb-test 0.16.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 97 packages
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding fancy-regex v0.12.0 (latest: v0.13.0)
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding libcnb v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding libcnb-common v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding libcnb-data v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding libcnb-package v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding libcnb-proc-macros v0.16.0 (latest: v0.19.0)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding which v5.0.0 (latest: v6.0.1)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1ef1a6686b8a8640704e0ba18108947e514c3be2a1c3e70e6093c5498b1d22a2
[INFO] running `Command { std: "docker" "start" "-a" "1ef1a6686b8a8640704e0ba18108947e514c3be2a1c3e70e6093c5498b1d22a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ef1a6686b8a8640704e0ba18108947e514c3be2a1c3e70e6093c5498b1d22a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ef1a6686b8a8640704e0ba18108947e514c3be2a1c3e70e6093c5498b1d22a2", kill_on_drop: false }`
[INFO] [stdout] 1ef1a6686b8a8640704e0ba18108947e514c3be2a1c3e70e6093c5498b1d22a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 557f98061f5d352e81444d5ca3c7f35a31e039c487b5ddf5e310f923bf4045cf
[INFO] running `Command { std: "docker" "start" "-a" "557f98061f5d352e81444d5ca3c7f35a31e039c487b5ddf5e310f923bf4045cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling camino v1.1.6
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling ryu v1.0.17
[INFO] [stderr]     Checking winnow v0.6.5
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking uriparse v0.6.4
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]    Compiling bit-set v0.5.3
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking home v0.5.9
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking fs_extra v1.3.0
[INFO] [stderr]     Checking ureq v2.9.6
[INFO] [stderr]    Compiling indoc v2.0.5
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]     Checking which v5.0.0
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling fancy-regex v0.12.0
[INFO] [stderr]     Checking globset v0.4.14
[INFO] [stderr]     Checking ignore v0.4.22
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking toml_datetime v0.6.5
[INFO] [stderr]     Checking serde_spanned v0.6.5
[INFO] [stderr]     Checking cargo-platform v0.1.8
[INFO] [stderr]     Checking toml_edit v0.22.9
[INFO] [stderr]     Checking cargo_metadata v0.18.1
[INFO] [stderr]     Checking toml v0.8.12
[INFO] [stderr]     Checking libcnb-common v0.16.0
[INFO] [stderr]    Compiling libcnb-proc-macros v0.16.0
[INFO] [stderr]     Checking libcnb-data v0.16.0
[INFO] [stderr]     Checking libcnb-package v0.16.0
[INFO] [stderr]     Checking libcnb v0.16.0
[INFO] [stderr]     Checking libcnb-test v0.16.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.71s
[INFO] running `Command { std: "docker" "inspect" "557f98061f5d352e81444d5ca3c7f35a31e039c487b5ddf5e310f923bf4045cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "557f98061f5d352e81444d5ca3c7f35a31e039c487b5ddf5e310f923bf4045cf", kill_on_drop: false }`
[INFO] [stdout] 557f98061f5d352e81444d5ca3c7f35a31e039c487b5ddf5e310f923bf4045cf