[INFO] fetching crate mtcp-rs 0.1.11...
[INFO] checking mtcp-rs-0.1.11 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate mtcp-rs 0.1.11 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate mtcp-rs 0.1.11 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 mtcp-rs 0.1.11
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mtcp-rs 0.1.11
[INFO] tweaked toml for crates.io crate mtcp-rs 0.1.11 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate mtcp-rs 0.1.11 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 windows-targets v0.42.1
[INFO] [stderr]   Downloaded spare_buffer v0.1.1
[INFO] [stderr]   Downloaded is-terminal v0.4.3
[INFO] [stderr]   Downloaded ctrlc v3.2.5
[INFO] [stderr]   Downloaded lazy_rc v0.1.3
[INFO] [stderr]   Downloaded dns-lookup v1.0.8
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.14
[INFO] [stderr]   Downloaded io-lifetimes v1.0.5
[INFO] [stderr]   Downloaded socket2 v0.4.7
[INFO] [stderr]   Downloaded rustix v0.36.8
[INFO] [stderr]   Downloaded regex v1.7.1
[INFO] [stderr]   Downloaded windows_aarch64_gnullvm v0.42.1
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.42.1
[INFO] [stderr]   Downloaded windows_i686_gnu v0.42.1
[INFO] [stderr]   Downloaded windows_i686_msvc v0.42.1
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.42.1
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.42.1
[INFO] [stderr]   Downloaded libc v0.2.139
[INFO] [stderr]   Downloaded windows_x86_64_gnullvm v0.42.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] bca1dd3478e8341b9e4b9a91e89067a8fca4950f35d81e830eab20564dee791c
[INFO] running `Command { std: "docker" "start" "-a" "bca1dd3478e8341b9e4b9a91e89067a8fca4950f35d81e830eab20564dee791c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bca1dd3478e8341b9e4b9a91e89067a8fca4950f35d81e830eab20564dee791c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bca1dd3478e8341b9e4b9a91e89067a8fca4950f35d81e830eab20564dee791c", kill_on_drop: false }`
[INFO] [stdout] bca1dd3478e8341b9e4b9a91e89067a8fca4950f35d81e830eab20564dee791c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] fdf7a1c10cb4fd353304c96927eab11a1035756fe926afdf770caefa78bdfffc
[INFO] running `Command { std: "docker" "start" "-a" "fdf7a1c10cb4fd353304c96927eab11a1035756fe926afdf770caefa78bdfffc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling io-lifetimes v1.0.5
[INFO] [stderr]    Compiling rustix v0.36.8
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]     Checking linux-raw-sys v0.1.4
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking spare_buffer v0.1.1
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking lazy_rc v0.1.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking mio v0.8.6
[INFO] [stderr]     Checking nix v0.26.2
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking mtcp-rs v0.1.11 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking dns-lookup v1.0.8
[INFO] [stderr]     Checking is-terminal v0.4.3
[INFO] [stderr]     Checking ctrlc v3.2.5
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.18s
[INFO] running `Command { std: "docker" "inspect" "fdf7a1c10cb4fd353304c96927eab11a1035756fe926afdf770caefa78bdfffc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf7a1c10cb4fd353304c96927eab11a1035756fe926afdf770caefa78bdfffc", kill_on_drop: false }`
[INFO] [stdout] fdf7a1c10cb4fd353304c96927eab11a1035756fe926afdf770caefa78bdfffc
[INFO] checking mtcp-rs-0.1.11 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate mtcp-rs 0.1.11 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate mtcp-rs 0.1.11 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 mtcp-rs 0.1.11
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mtcp-rs 0.1.11
[INFO] tweaked toml for crates.io crate mtcp-rs 0.1.11 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate mtcp-rs 0.1.11 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 05f61cbbdcc975d077bbc599f18ac55947bad4ca419f6a141901fe88aa776c42
[INFO] running `Command { std: "docker" "start" "-a" "05f61cbbdcc975d077bbc599f18ac55947bad4ca419f6a141901fe88aa776c42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05f61cbbdcc975d077bbc599f18ac55947bad4ca419f6a141901fe88aa776c42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05f61cbbdcc975d077bbc599f18ac55947bad4ca419f6a141901fe88aa776c42", kill_on_drop: false }`
[INFO] [stdout] 05f61cbbdcc975d077bbc599f18ac55947bad4ca419f6a141901fe88aa776c42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 821e7bf18544b35921954e3bb86331adf9ff13a2078acd032767919c942dbd69
[INFO] running `Command { std: "docker" "start" "-a" "821e7bf18544b35921954e3bb86331adf9ff13a2078acd032767919c942dbd69", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling io-lifetimes v1.0.5
[INFO] [stderr]    Compiling rustix v0.36.8
[INFO] [stderr]     Checking linux-raw-sys v0.1.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking lazy_rc v0.1.3
[INFO] [stderr]     Checking spare_buffer v0.1.1
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]     Checking nix v0.26.2
[INFO] [stderr]     Checking mio v0.8.6
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking dns-lookup v1.0.8
[INFO] [stderr]     Checking mtcp-rs v0.1.11 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex v1.7.1
[INFO] [stderr]     Checking ctrlc v3.2.5
[INFO] [stderr]     Checking is-terminal v0.4.3
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.50s
[INFO] running `Command { std: "docker" "inspect" "821e7bf18544b35921954e3bb86331adf9ff13a2078acd032767919c942dbd69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "821e7bf18544b35921954e3bb86331adf9ff13a2078acd032767919c942dbd69", kill_on_drop: false }`
[INFO] [stdout] 821e7bf18544b35921954e3bb86331adf9ff13a2078acd032767919c942dbd69