[INFO] fetching crate isle 0.0.0-reserve...
[INFO] checking isle-0.0.0-reserve against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920
[INFO] extracting crate isle 0.0.0-reserve into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate isle 0.0.0-reserve on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate isle 0.0.0-reserve
[INFO] finished tweaking crates.io crate isle 0.0.0-reserve
[INFO] tweaked toml for crates.io crate isle 0.0.0-reserve written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate isle 0.0.0-reserve already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8142f5636b8cbc22fba69052598adb23d8e589962aa6c1395613fc2a8406b973
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8142f5636b8cbc22fba69052598adb23d8e589962aa6c1395613fc2a8406b973", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8142f5636b8cbc22fba69052598adb23d8e589962aa6c1395613fc2a8406b973", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8142f5636b8cbc22fba69052598adb23d8e589962aa6c1395613fc2a8406b973", kill_on_drop: false }`
[INFO] [stdout] 8142f5636b8cbc22fba69052598adb23d8e589962aa6c1395613fc2a8406b973
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 019bcac4203be6ce6e9e3578ba14157d63f8e3e8539bbf931c3c57599f4192ff
[INFO] running `Command { std: "docker" "start" "-a" "019bcac4203be6ce6e9e3578ba14157d63f8e3e8539bbf931c3c57599f4192ff", kill_on_drop: false }`
[INFO] [stderr]     Checking isle v0.0.0-reserve (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "019bcac4203be6ce6e9e3578ba14157d63f8e3e8539bbf931c3c57599f4192ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "019bcac4203be6ce6e9e3578ba14157d63f8e3e8539bbf931c3c57599f4192ff", kill_on_drop: false }`
[INFO] [stdout] 019bcac4203be6ce6e9e3578ba14157d63f8e3e8539bbf931c3c57599f4192ff