[INFO] fetching crate libbtrfsutil 0.6.0...
[INFO] checking libbtrfsutil-0.6.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate libbtrfsutil 0.6.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate libbtrfsutil 0.6.0 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 libbtrfsutil 0.6.0
[INFO] finished tweaking crates.io crate libbtrfsutil 0.6.0
[INFO] tweaked toml for crates.io crate libbtrfsutil 0.6.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate libbtrfsutil 0.6.0 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 crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libbtrfsutil-sys v0.1.0
[INFO] [stderr]   Downloaded nom v7.1.1
[INFO] [stderr]   Downloaded libloading v0.7.3
[INFO] [stderr]   Downloaded clang-sys v1.3.3
[INFO] [stderr]   Downloaded uuid v1.1.2
[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] 550f9de37b8248d28e77b13d4a9d80517dacfd2b028d3b019841634d3b4768c6
[INFO] running `Command { std: "docker" "start" "-a" "550f9de37b8248d28e77b13d4a9d80517dacfd2b028d3b019841634d3b4768c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "550f9de37b8248d28e77b13d4a9d80517dacfd2b028d3b019841634d3b4768c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "550f9de37b8248d28e77b13d4a9d80517dacfd2b028d3b019841634d3b4768c6", kill_on_drop: false }`
[INFO] [stdout] 550f9de37b8248d28e77b13d4a9d80517dacfd2b028d3b019841634d3b4768c6
[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] a6818a20396fa30972a7d69ae7335b4f65b0bbf5956efb121af3c2d9e2bcf8cf
[INFO] running `Command { std: "docker" "start" "-a" "a6818a20396fa30972a7d69ae7335b4f65b0bbf5956efb121af3c2d9e2bcf8cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling libloading v0.7.3
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling bindgen v0.60.1
[INFO] [stderr]    Compiling nom v7.1.1
[INFO] [stderr]    Compiling clang-sys v1.3.3
[INFO] [stderr]    Compiling either v1.7.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v4.2.5
[INFO] [stderr]     Checking uuid v1.1.2
[INFO] [stderr]    Compiling regex v1.6.0
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling env_logger v0.9.3
[INFO] [stderr]    Compiling libbtrfsutil-sys v0.1.0
[INFO] [stderr]     Checking libbtrfsutil v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 26.60s
[INFO] running `Command { std: "docker" "inspect" "a6818a20396fa30972a7d69ae7335b4f65b0bbf5956efb121af3c2d9e2bcf8cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6818a20396fa30972a7d69ae7335b4f65b0bbf5956efb121af3c2d9e2bcf8cf", kill_on_drop: false }`
[INFO] [stdout] a6818a20396fa30972a7d69ae7335b4f65b0bbf5956efb121af3c2d9e2bcf8cf
[INFO] checking libbtrfsutil-0.6.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate libbtrfsutil 0.6.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate libbtrfsutil 0.6.0 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 libbtrfsutil 0.6.0
[INFO] finished tweaking crates.io crate libbtrfsutil 0.6.0
[INFO] tweaked toml for crates.io crate libbtrfsutil 0.6.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate libbtrfsutil 0.6.0 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] [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-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] b2294b3861250b36dc304fadf4e5e6111b157e2dac799d1a06fda0a9b5bc3b98
[INFO] running `Command { std: "docker" "start" "-a" "b2294b3861250b36dc304fadf4e5e6111b157e2dac799d1a06fda0a9b5bc3b98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2294b3861250b36dc304fadf4e5e6111b157e2dac799d1a06fda0a9b5bc3b98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2294b3861250b36dc304fadf4e5e6111b157e2dac799d1a06fda0a9b5bc3b98", kill_on_drop: false }`
[INFO] [stdout] b2294b3861250b36dc304fadf4e5e6111b157e2dac799d1a06fda0a9b5bc3b98
[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] b0a7f21d8b851d73bef419923b03e9050938c43bc1b2b46bf5b893046249d169
[INFO] running `Command { std: "docker" "start" "-a" "b0a7f21d8b851d73bef419923b03e9050938c43bc1b2b46bf5b893046249d169", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling libloading v0.7.3
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling either v1.7.0
[INFO] [stderr]    Compiling nom v7.1.1
[INFO] [stderr]    Compiling bindgen v0.60.1
[INFO] [stderr]    Compiling clang-sys v1.3.3
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling which v4.2.5
[INFO] [stderr]     Checking uuid v1.1.2
[INFO] [stderr]    Compiling regex v1.6.0
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling env_logger v0.9.3
[INFO] [stderr]    Compiling libbtrfsutil-sys v0.1.0
[INFO] [stderr]     Checking libbtrfsutil v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 30.12s
[INFO] running `Command { std: "docker" "inspect" "b0a7f21d8b851d73bef419923b03e9050938c43bc1b2b46bf5b893046249d169", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0a7f21d8b851d73bef419923b03e9050938c43bc1b2b46bf5b893046249d169", kill_on_drop: false }`
[INFO] [stdout] b0a7f21d8b851d73bef419923b03e9050938c43bc1b2b46bf5b893046249d169