[INFO] fetching crate epimetheus 0.8.0...
[INFO] checking epimetheus-0.8.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate epimetheus 0.8.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate epimetheus 0.8.0 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 epimetheus 0.8.0
[INFO] finished tweaking crates.io crate epimetheus 0.8.0
[INFO] tweaked toml for crates.io crate epimetheus 0.8.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate epimetheus 0.8.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-log v0.1.3
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.15
[INFO] [stderr]   Downloaded tracing-attributes v0.1.22
[INFO] [stderr]   Downloaded tracing v0.1.36
[INFO] [stderr]   Downloaded once_cell v1.15.0
[INFO] [stderr]   Downloaded tracing-core v0.1.29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7348665743ef42668d073a7cab2593fd10a0a8ee2fac3cd2fafc162a64291178
[INFO] running `Command { std: "docker" "start" "-a" "7348665743ef42668d073a7cab2593fd10a0a8ee2fac3cd2fafc162a64291178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7348665743ef42668d073a7cab2593fd10a0a8ee2fac3cd2fafc162a64291178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7348665743ef42668d073a7cab2593fd10a0a8ee2fac3cd2fafc162a64291178", kill_on_drop: false }`
[INFO] [stdout] 7348665743ef42668d073a7cab2593fd10a0a8ee2fac3cd2fafc162a64291178
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] c3b26d1d89062524ff933e83c1442e77469a0ed839f6fe158239c031d5d86590
[INFO] running `Command { std: "docker" "start" "-a" "c3b26d1d89062524ff933e83c1442e77469a0ed839f6fe158239c031d5d86590", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.100
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking tracing-subscriber v0.3.15
[INFO] [stderr]    Compiling tracing-attributes v0.1.22
[INFO] [stderr]     Checking tracing v0.1.36
[INFO] [stderr]     Checking epimetheus v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.33s
[INFO] running `Command { std: "docker" "inspect" "c3b26d1d89062524ff933e83c1442e77469a0ed839f6fe158239c031d5d86590", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3b26d1d89062524ff933e83c1442e77469a0ed839f6fe158239c031d5d86590", kill_on_drop: false }`
[INFO] [stdout] c3b26d1d89062524ff933e83c1442e77469a0ed839f6fe158239c031d5d86590
[INFO] checking epimetheus-0.8.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate epimetheus 0.8.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate epimetheus 0.8.0 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 epimetheus 0.8.0
[INFO] finished tweaking crates.io crate epimetheus 0.8.0
[INFO] tweaked toml for crates.io crate epimetheus 0.8.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate epimetheus 0.8.0 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] f0d4913e38a2303c2aa9fffc793a7de5398b0fc06e9ad6f46b79ab3f77e25eb6
[INFO] running `Command { std: "docker" "start" "-a" "f0d4913e38a2303c2aa9fffc793a7de5398b0fc06e9ad6f46b79ab3f77e25eb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0d4913e38a2303c2aa9fffc793a7de5398b0fc06e9ad6f46b79ab3f77e25eb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0d4913e38a2303c2aa9fffc793a7de5398b0fc06e9ad6f46b79ab3f77e25eb6", kill_on_drop: false }`
[INFO] [stdout] f0d4913e38a2303c2aa9fffc793a7de5398b0fc06e9ad6f46b79ab3f77e25eb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0e0a8cfce88c9fee2187ca059675accc0199780003bc0f791b7568eaec9bc8b4
[INFO] running `Command { std: "docker" "start" "-a" "0e0a8cfce88c9fee2187ca059675accc0199780003bc0f791b7568eaec9bc8b4", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.100
[INFO] [stderr]    Compiling crossbeam-utils v0.8.11
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]     Checking tracing-subscriber v0.3.15
[INFO] [stderr]    Compiling tracing-attributes v0.1.22
[INFO] [stderr]     Checking tracing v0.1.36
[INFO] [stderr]     Checking epimetheus v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.81s
[INFO] running `Command { std: "docker" "inspect" "0e0a8cfce88c9fee2187ca059675accc0199780003bc0f791b7568eaec9bc8b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e0a8cfce88c9fee2187ca059675accc0199780003bc0f791b7568eaec9bc8b4", kill_on_drop: false }`
[INFO] [stdout] 0e0a8cfce88c9fee2187ca059675accc0199780003bc0f791b7568eaec9bc8b4