[INFO] fetching crate half_matrix 0.2.1...
[INFO] checking half_matrix-0.2.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate half_matrix 0.2.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate half_matrix 0.2.1 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 half_matrix 0.2.1
[INFO] finished tweaking crates.io crate half_matrix 0.2.1
[INFO] tweaked toml for crates.io crate half_matrix 0.2.1 written to /workspace/builds/worker-4-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 9 packages
[INFO] [stderr]       Adding atom v0.3.6 (latest: v0.4.0)
[INFO] [stderr]       Adding hibitset v0.5.4 (latest: v0.6.4)
[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 hibitset v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] a5c79b3f2a9917f50895de251e99a3787c093ad772625cf6ca7421f11952c97c
[INFO] running `Command { std: "docker" "start" "-a" "a5c79b3f2a9917f50895de251e99a3787c093ad772625cf6ca7421f11952c97c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5c79b3f2a9917f50895de251e99a3787c093ad772625cf6ca7421f11952c97c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5c79b3f2a9917f50895de251e99a3787c093ad772625cf6ca7421f11952c97c", kill_on_drop: false }`
[INFO] [stdout] a5c79b3f2a9917f50895de251e99a3787c093ad772625cf6ca7421f11952c97c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 9806342a027322309aabdbe3ea1da0e555e96aac2059b43bbb50198adfe22ffd
[INFO] running `Command { std: "docker" "start" "-a" "9806342a027322309aabdbe3ea1da0e555e96aac2059b43bbb50198adfe22ffd", kill_on_drop: false }`
[INFO] [stderr]     Checking atom v0.3.6
[INFO] [stderr]     Checking hibitset v0.5.4
[INFO] [stderr]     Checking half_matrix v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "9806342a027322309aabdbe3ea1da0e555e96aac2059b43bbb50198adfe22ffd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9806342a027322309aabdbe3ea1da0e555e96aac2059b43bbb50198adfe22ffd", kill_on_drop: false }`
[INFO] [stdout] 9806342a027322309aabdbe3ea1da0e555e96aac2059b43bbb50198adfe22ffd
[INFO] checking half_matrix-0.2.1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate half_matrix 0.2.1 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate half_matrix 0.2.1 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 half_matrix 0.2.1
[INFO] finished tweaking crates.io crate half_matrix 0.2.1
[INFO] tweaked toml for crates.io crate half_matrix 0.2.1 written to /workspace/builds/worker-4-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]     Updating crates.io index
[INFO] [stderr]      Locking 9 packages
[INFO] [stderr]       Adding atom v0.3.6 (latest: v0.4.0)
[INFO] [stderr]       Adding hibitset v0.5.4 (latest: v0.6.4)
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 7751fc649ac5b0c19b5d3b7651fb82d4ef82aa60b0ce7fc246383a4ea25068a5
[INFO] running `Command { std: "docker" "start" "-a" "7751fc649ac5b0c19b5d3b7651fb82d4ef82aa60b0ce7fc246383a4ea25068a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7751fc649ac5b0c19b5d3b7651fb82d4ef82aa60b0ce7fc246383a4ea25068a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7751fc649ac5b0c19b5d3b7651fb82d4ef82aa60b0ce7fc246383a4ea25068a5", kill_on_drop: false }`
[INFO] [stdout] 7751fc649ac5b0c19b5d3b7651fb82d4ef82aa60b0ce7fc246383a4ea25068a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8ec7dfb1ec69bb498a4e1611dafda3ec669c62d97c1a516e07407f9692a03764
[INFO] running `Command { std: "docker" "start" "-a" "8ec7dfb1ec69bb498a4e1611dafda3ec669c62d97c1a516e07407f9692a03764", kill_on_drop: false }`
[INFO] [stderr]     Checking atom v0.3.6
[INFO] [stderr]     Checking hibitset v0.5.4
[INFO] [stderr]     Checking half_matrix v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "8ec7dfb1ec69bb498a4e1611dafda3ec669c62d97c1a516e07407f9692a03764", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ec7dfb1ec69bb498a4e1611dafda3ec669c62d97c1a516e07407f9692a03764", kill_on_drop: false }`
[INFO] [stdout] 8ec7dfb1ec69bb498a4e1611dafda3ec669c62d97c1a516e07407f9692a03764