[INFO] fetching crate isle 0.0.0-reserve...
[INFO] checking isle-0.0.0-reserve against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate isle 0.0.0-reserve into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate isle 0.0.0-reserve on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "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-4/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 646d6ebad2bd7195a0b665ec51971bc01b3325fb9bdc8074176881e1e3c677e6
[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" "646d6ebad2bd7195a0b665ec51971bc01b3325fb9bdc8074176881e1e3c677e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "646d6ebad2bd7195a0b665ec51971bc01b3325fb9bdc8074176881e1e3c677e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "646d6ebad2bd7195a0b665ec51971bc01b3325fb9bdc8074176881e1e3c677e6", kill_on_drop: false }`
[INFO] [stdout] 646d6ebad2bd7195a0b665ec51971bc01b3325fb9bdc8074176881e1e3c677e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6586e4b69e581b1a06a302cc907de8013ef91129b85fed61f604bc7058ced638
[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" "6586e4b69e581b1a06a302cc907de8013ef91129b85fed61f604bc7058ced638", kill_on_drop: false }`
[INFO] [stderr]     Checking isle v0.0.0-reserve (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "6586e4b69e581b1a06a302cc907de8013ef91129b85fed61f604bc7058ced638", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6586e4b69e581b1a06a302cc907de8013ef91129b85fed61f604bc7058ced638", kill_on_drop: false }`
[INFO] [stdout] 6586e4b69e581b1a06a302cc907de8013ef91129b85fed61f604bc7058ced638