[INFO] fetching crate dingus 0.5.7...
[INFO] checking dingus-0.5.7 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate dingus 0.5.7 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate dingus 0.5.7 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 dingus 0.5.7
[INFO] finished tweaking crates.io crate dingus 0.5.7
[INFO] tweaked toml for crates.io crate dingus 0.5.7 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 47 packages
[INFO] [stderr]       Adding ansi_term v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding nix v0.13.1 (latest: v0.28.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding serde_yaml v0.8.26 (latest: v0.9.34+deprecated)
[INFO] [stderr]       Adding strsim v0.8.0 (latest: v0.11.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[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 nix v0.13.1
[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] c2835aa9ee9c5c21489c24889ff932ead9f1e8e24e3fedb390716945ec5c57b5
[INFO] running `Command { std: "docker" "start" "-a" "c2835aa9ee9c5c21489c24889ff932ead9f1e8e24e3fedb390716945ec5c57b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2835aa9ee9c5c21489c24889ff932ead9f1e8e24e3fedb390716945ec5c57b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2835aa9ee9c5c21489c24889ff932ead9f1e8e24e3fedb390716945ec5c57b5", kill_on_drop: false }`
[INFO] [stdout] c2835aa9ee9c5c21489c24889ff932ead9f1e8e24e3fedb390716945ec5c57b5
[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] 2b21b27bc1f55b594fbd2d5b2da39ae6cc158f3932c2b768a77388b91f48d99e
[INFO] running `Command { std: "docker" "start" "-a" "2b21b27bc1f55b594fbd2d5b2da39ae6cc158f3932c2b768a77388b91f48d99e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling nix v0.13.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking dingus v0.5.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.00s
[INFO] running `Command { std: "docker" "inspect" "2b21b27bc1f55b594fbd2d5b2da39ae6cc158f3932c2b768a77388b91f48d99e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b21b27bc1f55b594fbd2d5b2da39ae6cc158f3932c2b768a77388b91f48d99e", kill_on_drop: false }`
[INFO] [stdout] 2b21b27bc1f55b594fbd2d5b2da39ae6cc158f3932c2b768a77388b91f48d99e
[INFO] checking dingus-0.5.7 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate dingus 0.5.7 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate dingus 0.5.7 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 dingus 0.5.7
[INFO] finished tweaking crates.io crate dingus 0.5.7
[INFO] tweaked toml for crates.io crate dingus 0.5.7 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]      Locking 47 packages
[INFO] [stderr]       Adding ansi_term v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding nix v0.13.1 (latest: v0.28.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding serde_yaml v0.8.26 (latest: v0.9.34+deprecated)
[INFO] [stderr]       Adding strsim v0.8.0 (latest: v0.11.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[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-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] 375c45ce835d99c23f9a25cd46ad43420918790af4ce378edbceb71b85dbd4eb
[INFO] running `Command { std: "docker" "start" "-a" "375c45ce835d99c23f9a25cd46ad43420918790af4ce378edbceb71b85dbd4eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "375c45ce835d99c23f9a25cd46ad43420918790af4ce378edbceb71b85dbd4eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "375c45ce835d99c23f9a25cd46ad43420918790af4ce378edbceb71b85dbd4eb", kill_on_drop: false }`
[INFO] [stdout] 375c45ce835d99c23f9a25cd46ad43420918790af4ce378edbceb71b85dbd4eb
[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] 1af3bba3386dba2aa0aaf367bfa1e286708f9a0a8e57ffb451c61bbcbe0e406b
[INFO] running `Command { std: "docker" "start" "-a" "1af3bba3386dba2aa0aaf367bfa1e286708f9a0a8e57ffb451c61bbcbe0e406b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]    Compiling nix v0.13.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking term_size v0.3.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking object v0.32.2
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking backtrace v0.3.71
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking dingus v0.5.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.68s
[INFO] running `Command { std: "docker" "inspect" "1af3bba3386dba2aa0aaf367bfa1e286708f9a0a8e57ffb451c61bbcbe0e406b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1af3bba3386dba2aa0aaf367bfa1e286708f9a0a8e57ffb451c61bbcbe0e406b", kill_on_drop: false }`
[INFO] [stdout] 1af3bba3386dba2aa0aaf367bfa1e286708f9a0a8e57ffb451c61bbcbe0e406b