[INFO] fetching crate async-watch2 0.1.0...
[INFO] checking async-watch2-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate async-watch2 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate async-watch2 0.1.0 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 async-watch2 0.1.0
[INFO] finished tweaking crates.io crate async-watch2 0.1.0
[INFO] tweaked toml for crates.io crate async-watch2 0.1.0 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]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages
[INFO] [stderr]       Adding async-executor v0.1.2 (latest: v1.9.1)
[INFO] [stderr]       Adding async-io v0.1.11 (latest: v2.3.2)
[INFO] [stderr]       Adding async-task v3.0.0 (latest: v4.7.0)
[INFO] [stderr]       Adding bytes v0.5.6 (latest: v1.6.0)
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding concurrent-queue v1.2.4 (latest: v2.4.0)
[INFO] [stderr]       Adding fastrand v1.9.0 (latest: v2.0.2)
[INFO] [stderr]       Adding futures-lite v0.1.11 (latest: v2.3.0)
[INFO] [stderr]       Adding parking v1.0.6 (latest: v2.2.0)
[INFO] [stderr]       Adding pin-project-lite v0.1.12 (latest: v0.2.14)
[INFO] [stderr]       Adding polling v0.1.9 (latest: v3.6.0)
[INFO] [stderr]       Adding socket2 v0.3.19 (latest: v0.5.6)
[INFO] [stderr]       Adding tokio v0.2.25 (latest: v1.37.0)
[INFO] [stderr]       Adding tokio-test v0.2.1 (latest: v0.4.4)
[INFO] [stderr]       Adding vec-arena v0.5.2 (latest: v1.2.0)
[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 tokio-test v0.2.1
[INFO] [stderr]   Downloaded concurrent-queue v1.2.4
[INFO] [stderr]   Downloaded async-executor v0.1.2
[INFO] [stderr]   Downloaded multitask v0.2.0
[INFO] [stderr]   Downloaded parking v1.0.6
[INFO] [stderr]   Downloaded futures-lite v0.1.11
[INFO] [stderr]   Downloaded cache-padded v1.3.0
[INFO] [stderr]   Downloaded async-task v3.0.0
[INFO] [stderr]   Downloaded vec-arena v0.5.2
[INFO] [stderr]   Downloaded polling v0.1.9
[INFO] [stderr]   Downloaded wepoll-sys-stjepang v1.0.8
[INFO] [stderr]   Downloaded async-io v0.1.11
[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] 9252be1bf8f147f1111e175f683a5695ee8d4e687b5007cfbfeb5900ba1bae8f
[INFO] running `Command { std: "docker" "start" "-a" "9252be1bf8f147f1111e175f683a5695ee8d4e687b5007cfbfeb5900ba1bae8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9252be1bf8f147f1111e175f683a5695ee8d4e687b5007cfbfeb5900ba1bae8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9252be1bf8f147f1111e175f683a5695ee8d4e687b5007cfbfeb5900ba1bae8f", kill_on_drop: false }`
[INFO] [stdout] 9252be1bf8f147f1111e175f683a5695ee8d4e687b5007cfbfeb5900ba1bae8f
[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] e98e82231d26796f5ce7309d76c93d615c10c08330f6ff1a5490eb191be107a4
[INFO] running `Command { std: "docker" "start" "-a" "e98e82231d26796f5ce7309d76c93d615c10c08330f6ff1a5490eb191be107a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking cache-padded v1.3.0
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking concurrent-queue v1.2.4
[INFO] [stderr]     Checking vec-arena v0.5.2
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking atomic-waker v1.1.2
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]     Checking scoped-tls v1.0.1
[INFO] [stderr]     Checking async-watch2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking multitask v0.2.0
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking polling v0.1.9
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]     Checking tokio-test v0.2.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `Command { std: "docker" "inspect" "e98e82231d26796f5ce7309d76c93d615c10c08330f6ff1a5490eb191be107a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e98e82231d26796f5ce7309d76c93d615c10c08330f6ff1a5490eb191be107a4", kill_on_drop: false }`
[INFO] [stdout] e98e82231d26796f5ce7309d76c93d615c10c08330f6ff1a5490eb191be107a4
[INFO] checking async-watch2-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate async-watch2 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate async-watch2 0.1.0 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 async-watch2 0.1.0
[INFO] finished tweaking crates.io crate async-watch2 0.1.0
[INFO] tweaked toml for crates.io crate async-watch2 0.1.0 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]     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 38 packages
[INFO] [stderr]       Adding async-executor v0.1.2 (latest: v1.9.1)
[INFO] [stderr]       Adding async-io v0.1.11 (latest: v2.3.2)
[INFO] [stderr]       Adding async-task v3.0.0 (latest: v4.7.0)
[INFO] [stderr]       Adding bytes v0.5.6 (latest: v1.6.0)
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding concurrent-queue v1.2.4 (latest: v2.4.0)
[INFO] [stderr]       Adding fastrand v1.9.0 (latest: v2.0.2)
[INFO] [stderr]       Adding futures-lite v0.1.11 (latest: v2.3.0)
[INFO] [stderr]       Adding parking v1.0.6 (latest: v2.2.0)
[INFO] [stderr]       Adding pin-project-lite v0.1.12 (latest: v0.2.14)
[INFO] [stderr]       Adding polling v0.1.9 (latest: v3.6.0)
[INFO] [stderr]       Adding socket2 v0.3.19 (latest: v0.5.6)
[INFO] [stderr]       Adding tokio v0.2.25 (latest: v1.37.0)
[INFO] [stderr]       Adding tokio-test v0.2.1 (latest: v0.4.4)
[INFO] [stderr]       Adding vec-arena v0.5.2 (latest: v1.2.0)
[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] 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] f4fa5d81dfc92870c8b4c54f16b256347b07a1fd431339519df1fbefba4169e5
[INFO] running `Command { std: "docker" "start" "-a" "f4fa5d81dfc92870c8b4c54f16b256347b07a1fd431339519df1fbefba4169e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4fa5d81dfc92870c8b4c54f16b256347b07a1fd431339519df1fbefba4169e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4fa5d81dfc92870c8b4c54f16b256347b07a1fd431339519df1fbefba4169e5", kill_on_drop: false }`
[INFO] [stdout] f4fa5d81dfc92870c8b4c54f16b256347b07a1fd431339519df1fbefba4169e5
[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] 9e6cfd433f95c731491e5565e900ee689fbfefea0bc947485d06f40984280a2a
[INFO] running `Command { std: "docker" "start" "-a" "9e6cfd433f95c731491e5565e900ee689fbfefea0bc947485d06f40984280a2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking cache-padded v1.3.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking vec-arena v0.5.2
[INFO] [stderr]     Checking atomic-waker v1.1.2
[INFO] [stderr]     Checking concurrent-queue v1.2.4
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]     Checking scoped-tls v1.0.1
[INFO] [stderr]     Checking async-watch2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking multitask v0.2.0
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking polling v0.1.9
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]     Checking tokio-test v0.2.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.99s
[INFO] running `Command { std: "docker" "inspect" "9e6cfd433f95c731491e5565e900ee689fbfefea0bc947485d06f40984280a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e6cfd433f95c731491e5565e900ee689fbfefea0bc947485d06f40984280a2a", kill_on_drop: false }`
[INFO] [stdout] 9e6cfd433f95c731491e5565e900ee689fbfefea0bc947485d06f40984280a2a