[INFO] fetching crate prost-wkt-build 0.5.0...
[INFO] checking prost-wkt-build-0.5.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate prost-wkt-build 0.5.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate prost-wkt-build 0.5.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate prost-wkt-build 0.5.0
[INFO] finished tweaking crates.io crate prost-wkt-build 0.5.0
[INFO] tweaked toml for crates.io crate prost-wkt-build 0.5.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 47 packages
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding itertools v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding multimap v0.8.3 (latest: v0.10.0)
[INFO] [stderr]       Adding which v4.4.2 (latest: v6.0.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65fae2cbd6f8ecd5e95973587b473ea183100d186ca5676bc793af84633fc198
[INFO] running `Command { std: "docker" "start" "-a" "65fae2cbd6f8ecd5e95973587b473ea183100d186ca5676bc793af84633fc198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65fae2cbd6f8ecd5e95973587b473ea183100d186ca5676bc793af84633fc198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65fae2cbd6f8ecd5e95973587b473ea183100d186ca5676bc793af84633fc198", kill_on_drop: false }`
[INFO] [stdout] 65fae2cbd6f8ecd5e95973587b473ea183100d186ca5676bc793af84633fc198
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c52c20200ece53ddaa6b343fee6b9ece6702c08b85f5c2f87037d9ea96b961c8
[INFO] running `Command { std: "docker" "start" "-a" "c52c20200ece53ddaa6b343fee6b9ece6702c08b85f5c2f87037d9ea96b961c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]    Compiling prettyplease v0.2.17
[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]     Checking home v0.5.9
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]     Checking which v4.4.2
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking heck v0.4.1
[INFO] [stderr]     Checking multimap v0.8.3
[INFO] [stderr]     Checking quote v1.0.35
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]    Compiling prost-derive v0.12.3
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking prost v0.12.3
[INFO] [stderr]     Checking prost-types v0.12.3
[INFO] [stderr]     Checking prost-build v0.12.3
[INFO] [stderr]     Checking prost-wkt-build v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.70s
[INFO] running `Command { std: "docker" "inspect" "c52c20200ece53ddaa6b343fee6b9ece6702c08b85f5c2f87037d9ea96b961c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c52c20200ece53ddaa6b343fee6b9ece6702c08b85f5c2f87037d9ea96b961c8", kill_on_drop: false }`
[INFO] [stdout] c52c20200ece53ddaa6b343fee6b9ece6702c08b85f5c2f87037d9ea96b961c8