[INFO] fetching crate exons 0.1.2...
[INFO] checking exons-0.1.2 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate exons 0.1.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate exons 0.1.2 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exons 0.1.2
[INFO] finished tweaking crates.io crate exons 0.1.2
[INFO] tweaked toml for crates.io crate exons 0.1.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lz4 v1.23.2
[INFO] [stderr]   Downloaded permutation v0.2.5
[INFO] [stderr]   Downloaded lz4-sys v1.9.2
[INFO] [stderr]   Downloaded vector_utils v0.1.3
[INFO] [stderr]   Downloaded string_utils v0.1.1
[INFO] [stderr]   Downloaded superslice v1.0.0
[INFO] [stderr]   Downloaded io_utils v0.2.6
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b36ee3267a6f20f59654b9e1e66693764db541df3bd6ad9d7f3b6acae3cd807
[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" "1b36ee3267a6f20f59654b9e1e66693764db541df3bd6ad9d7f3b6acae3cd807", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b36ee3267a6f20f59654b9e1e66693764db541df3bd6ad9d7f3b6acae3cd807", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b36ee3267a6f20f59654b9e1e66693764db541df3bd6ad9d7f3b6acae3cd807", kill_on_drop: false }`
[INFO] [stdout] 1b36ee3267a6f20f59654b9e1e66693764db541df3bd6ad9d7f3b6acae3cd807
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] c3a937578e49eeeb8e17a6d0d7363f3a36549b047b4e731fbcb23794e28fa3c5
[INFO] running `Command { std: "docker" "start" "-a" "c3a937578e49eeeb8e17a6d0d7363f3a36549b047b4e731fbcb23794e28fa3c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking permutation v0.2.5
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking superslice v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling lz4-sys v1.9.2
[INFO] [stderr]     Checking vector_utils v0.1.3
[INFO] [stderr]     Checking string_utils v0.1.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking flate2 v1.0.18
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking lz4 v1.23.2
[INFO] [stderr]     Checking io_utils v0.2.6
[INFO] [stderr]     Checking exons v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.25s
[INFO] running `Command { std: "docker" "inspect" "c3a937578e49eeeb8e17a6d0d7363f3a36549b047b4e731fbcb23794e28fa3c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3a937578e49eeeb8e17a6d0d7363f3a36549b047b4e731fbcb23794e28fa3c5", kill_on_drop: false }`
[INFO] [stdout] c3a937578e49eeeb8e17a6d0d7363f3a36549b047b4e731fbcb23794e28fa3c5