[INFO] fetching crate serde_fs 0.2.0...
[INFO] checking serde_fs-0.2.0 against master#9503ea19edbf01b9435e80e17d60ce1b88390116 for pr-81782
[INFO] extracting crate serde_fs 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate serde_fs 0.2.0 on toolchain 9503ea19edbf01b9435e80e17d60ce1b88390116
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_fs 0.2.0
[INFO] finished tweaking crates.io crate serde_fs 0.2.0
[INFO] tweaked toml for crates.io crate serde_fs 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded case v0.1.0
[INFO] [stderr]   Downloaded derive-error v0.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82798efbbdeb85ea8caea7f430bff388488472704c2fa004055e77344c7f02d8
[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" "82798efbbdeb85ea8caea7f430bff388488472704c2fa004055e77344c7f02d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82798efbbdeb85ea8caea7f430bff388488472704c2fa004055e77344c7f02d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82798efbbdeb85ea8caea7f430bff388488472704c2fa004055e77344c7f02d8", kill_on_drop: false }`
[INFO] [stdout] 82798efbbdeb85ea8caea7f430bff388488472704c2fa004055e77344c7f02d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3668f89ea07618e141f997bdc2da76e408733308ea197c717f34f5fcba19bcb
[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" "b3668f89ea07618e141f997bdc2da76e408733308ea197c717f34f5fcba19bcb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling serde_json v1.0.63
[INFO] [stderr]    Compiling case v0.1.0
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking assert_matches v1.5.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking serde_bytes v0.10.5
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling derive-error v0.0.4
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking serde_fs v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/de.rs:323:14
[INFO] [stdout]     |
[INFO] [stdout] 323 |     dir: Box<Iterator<Item = Result<String, io::Error>>>,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Result<String, io::Error>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/de.rs:323:14
[INFO] [stdout]     |
[INFO] [stdout] 323 |     dir: Box<Iterator<Item = Result<String, io::Error>>>,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Result<String, io::Error>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.23s
[INFO] running `Command { std: "docker" "inspect" "b3668f89ea07618e141f997bdc2da76e408733308ea197c717f34f5fcba19bcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3668f89ea07618e141f997bdc2da76e408733308ea197c717f34f5fcba19bcb", kill_on_drop: false }`
[INFO] [stdout] b3668f89ea07618e141f997bdc2da76e408733308ea197c717f34f5fcba19bcb