[INFO] fetching crate flexar 1.2.6...
[INFO] checking flexar-1.2.6 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate flexar 1.2.6 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate flexar 1.2.6 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flexar 1.2.6
[INFO] finished tweaking crates.io crate flexar 1.2.6
[INFO] tweaked toml for crates.io crate flexar 1.2.6 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate flexar 1.2.6 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 416a8a9486c03c6d01b55312678c5852518b6041508155cbcd8d3cc041f6b2c0
[INFO] running `Command { std: "docker" "start" "-a" "416a8a9486c03c6d01b55312678c5852518b6041508155cbcd8d3cc041f6b2c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "416a8a9486c03c6d01b55312678c5852518b6041508155cbcd8d3cc041f6b2c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "416a8a9486c03c6d01b55312678c5852518b6041508155cbcd8d3cc041f6b2c0", kill_on_drop: false }`
[INFO] [stdout] 416a8a9486c03c6d01b55312678c5852518b6041508155cbcd8d3cc041f6b2c0
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3dfa3a43b5be584d9edb40b94746db24a78bb009c1c6413517da288554af585c
[INFO] running `Command { std: "docker" "start" "-a" "3dfa3a43b5be584d9edb40b94746db24a78bb009c1c6413517da288554af585c", kill_on_drop: false }`
[INFO] [stderr]     Checking flexar v1.2.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "3dfa3a43b5be584d9edb40b94746db24a78bb009c1c6413517da288554af585c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dfa3a43b5be584d9edb40b94746db24a78bb009c1c6413517da288554af585c", kill_on_drop: false }`
[INFO] [stdout] 3dfa3a43b5be584d9edb40b94746db24a78bb009c1c6413517da288554af585c