[INFO] fetching crate rmw-utf8 0.0.6...
[INFO] checking rmw-utf8-0.0.6 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rmw-utf8 0.0.6 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate rmw-utf8 0.0.6 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 rmw-utf8 0.0.6
[INFO] finished tweaking crates.io crate rmw-utf8 0.0.6
[INFO] tweaked toml for crates.io crate rmw-utf8 0.0.6 written to /workspace/builds/worker-6-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 21 packages
[INFO] [stderr]       Adding aho-corasick v0.7.20 (latest: v1.1.3)
[INFO] [stderr]       Adding ruzstd v0.2.4 (latest: v0.6.0)
[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 speedy-derive v0.8.7
[INFO] [stderr]   Downloaded ruzstd v0.2.4
[INFO] [stderr]   Downloaded speedy v0.8.7
[INFO] [stderr]   Downloaded huffman-compress v0.6.1
[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] 1920ff87cbdce0159061c5546f7fe63ffe16266516364ba5411bc4afa66f0b27
[INFO] running `Command { std: "docker" "start" "-a" "1920ff87cbdce0159061c5546f7fe63ffe16266516364ba5411bc4afa66f0b27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1920ff87cbdce0159061c5546f7fe63ffe16266516364ba5411bc4afa66f0b27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1920ff87cbdce0159061c5546f7fe63ffe16266516364ba5411bc4afa66f0b27", kill_on_drop: false }`
[INFO] [stdout] 1920ff87cbdce0159061c5546f7fe63ffe16266516364ba5411bc4afa66f0b27
[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] 29f2f262262e064ffe899ce1723d6bfb14b46afdcd7e82afe6de229a8c918c42
[INFO] running `Command { std: "docker" "start" "-a" "29f2f262262e064ffe899ce1723d6bfb14b46afdcd7e82afe6de229a8c918c42", kill_on_drop: false }`
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking utf8-width v0.1.7
[INFO] [stderr]    Compiling speedy-derive v0.8.7
[INFO] [stderr]     Checking huffman-compress v0.6.1
[INFO] [stderr]     Checking ruzstd v0.2.4
[INFO] [stderr]     Checking speedy v0.8.7
[INFO] [stderr]     Checking rmw-utf8 v0.0.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.45s
[INFO] running `Command { std: "docker" "inspect" "29f2f262262e064ffe899ce1723d6bfb14b46afdcd7e82afe6de229a8c918c42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29f2f262262e064ffe899ce1723d6bfb14b46afdcd7e82afe6de229a8c918c42", kill_on_drop: false }`
[INFO] [stdout] 29f2f262262e064ffe899ce1723d6bfb14b46afdcd7e82afe6de229a8c918c42
[INFO] checking rmw-utf8-0.0.6 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate rmw-utf8 0.0.6 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate rmw-utf8 0.0.6 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 rmw-utf8 0.0.6
[INFO] finished tweaking crates.io crate rmw-utf8 0.0.6
[INFO] tweaked toml for crates.io crate rmw-utf8 0.0.6 written to /workspace/builds/worker-6-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 21 packages
[INFO] [stderr]       Adding aho-corasick v0.7.20 (latest: v1.1.3)
[INFO] [stderr]       Adding ruzstd v0.2.4 (latest: v0.6.0)
[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-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] d17df98c8d0001baa8b28bfa48694530806c1ab844a7d79bc45aaecc625c478e
[INFO] running `Command { std: "docker" "start" "-a" "d17df98c8d0001baa8b28bfa48694530806c1ab844a7d79bc45aaecc625c478e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d17df98c8d0001baa8b28bfa48694530806c1ab844a7d79bc45aaecc625c478e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d17df98c8d0001baa8b28bfa48694530806c1ab844a7d79bc45aaecc625c478e", kill_on_drop: false }`
[INFO] [stdout] d17df98c8d0001baa8b28bfa48694530806c1ab844a7d79bc45aaecc625c478e
[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] 1e6d4f61751db2311b96e66d6e4b3fab05c51015649dafb437c26fa584448a38
[INFO] running `Command { std: "docker" "start" "-a" "1e6d4f61751db2311b96e66d6e4b3fab05c51015649dafb437c26fa584448a38", kill_on_drop: false }`
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking utf8-width v0.1.7
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]    Compiling speedy-derive v0.8.7
[INFO] [stderr]     Checking huffman-compress v0.6.1
[INFO] [stderr]     Checking ruzstd v0.2.4
[INFO] [stderr]     Checking speedy v0.8.7
[INFO] [stderr]     Checking rmw-utf8 v0.0.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.31s
[INFO] running `Command { std: "docker" "inspect" "1e6d4f61751db2311b96e66d6e4b3fab05c51015649dafb437c26fa584448a38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e6d4f61751db2311b96e66d6e4b3fab05c51015649dafb437c26fa584448a38", kill_on_drop: false }`
[INFO] [stdout] 1e6d4f61751db2311b96e66d6e4b3fab05c51015649dafb437c26fa584448a38