[INFO] fetching crate synoptic 1.2.0...
[INFO] checking synoptic-1.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate synoptic 1.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate synoptic 1.2.0 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 synoptic 1.2.0
[INFO] finished tweaking crates.io crate synoptic 1.2.0
[INFO] tweaked toml for crates.io crate synoptic 1.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate synoptic 1.2.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.105
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] f77043768c00481959990195b06ce01a68569b0de3a742cc4e013bf98e063c68
[INFO] running `Command { std: "docker" "start" "-a" "f77043768c00481959990195b06ce01a68569b0de3a742cc4e013bf98e063c68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f77043768c00481959990195b06ce01a68569b0de3a742cc4e013bf98e063c68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f77043768c00481959990195b06ce01a68569b0de3a742cc4e013bf98e063c68", kill_on_drop: false }`
[INFO] [stdout] f77043768c00481959990195b06ce01a68569b0de3a742cc4e013bf98e063c68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] d936a8ba4938256928a5725213f123a876b6e757c485e394879b1d6e4bd8db37
[INFO] running `Command { std: "docker" "start" "-a" "d936a8ba4938256928a5725213f123a876b6e757c485e394879b1d6e4bd8db37", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking synoptic v1.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "d936a8ba4938256928a5725213f123a876b6e757c485e394879b1d6e4bd8db37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d936a8ba4938256928a5725213f123a876b6e757c485e394879b1d6e4bd8db37", kill_on_drop: false }`
[INFO] [stdout] d936a8ba4938256928a5725213f123a876b6e757c485e394879b1d6e4bd8db37
[INFO] checking synoptic-1.2.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate synoptic 1.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate synoptic 1.2.0 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 synoptic 1.2.0
[INFO] finished tweaking crates.io crate synoptic 1.2.0
[INFO] tweaked toml for crates.io crate synoptic 1.2.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate synoptic 1.2.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] bd340b05b93fc3a4bd4a253a897f7efc760c353ad65843a929b21d3cc71743ca
[INFO] running `Command { std: "docker" "start" "-a" "bd340b05b93fc3a4bd4a253a897f7efc760c353ad65843a929b21d3cc71743ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd340b05b93fc3a4bd4a253a897f7efc760c353ad65843a929b21d3cc71743ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd340b05b93fc3a4bd4a253a897f7efc760c353ad65843a929b21d3cc71743ca", kill_on_drop: false }`
[INFO] [stdout] bd340b05b93fc3a4bd4a253a897f7efc760c353ad65843a929b21d3cc71743ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5fbe5679bad248c762cfbe518c54f720b67c13c589ae0651a4b7947c25e7ef93
[INFO] running `Command { std: "docker" "start" "-a" "5fbe5679bad248c762cfbe518c54f720b67c13c589ae0651a4b7947c25e7ef93", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking synoptic v1.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.57s
[INFO] running `Command { std: "docker" "inspect" "5fbe5679bad248c762cfbe518c54f720b67c13c589ae0651a4b7947c25e7ef93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fbe5679bad248c762cfbe518c54f720b67c13c589ae0651a4b7947c25e7ef93", kill_on_drop: false }`
[INFO] [stdout] 5fbe5679bad248c762cfbe518c54f720b67c13c589ae0651a4b7947c25e7ef93