[INFO] fetching crate serde_json_v8 0.0.1...
[INFO] checking serde_json_v8-0.0.1 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate serde_json_v8 0.0.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate serde_json_v8 0.0.1 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_json_v8 0.0.1
[INFO] finished tweaking crates.io crate serde_json_v8 0.0.1
[INFO] tweaked toml for crates.io crate serde_json_v8 0.0.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73034d38fd8678763da38fa395cfbd9eaf3ab1a1feab96b02a0f6d61baa30119
[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" "73034d38fd8678763da38fa395cfbd9eaf3ab1a1feab96b02a0f6d61baa30119", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73034d38fd8678763da38fa395cfbd9eaf3ab1a1feab96b02a0f6d61baa30119", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73034d38fd8678763da38fa395cfbd9eaf3ab1a1feab96b02a0f6d61baa30119", kill_on_drop: false }`
[INFO] [stdout] 73034d38fd8678763da38fa395cfbd9eaf3ab1a1feab96b02a0f6d61baa30119
[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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22f0101e727ab7ac1e6f3fea2fcc761722d0fa4546e17d9ffb05c837664153dd
[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" "22f0101e727ab7ac1e6f3fea2fcc761722d0fa4546e17d9ffb05c837664153dd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]    Compiling compiletest_rs v0.3.26
[INFO] [stderr]    Compiling psm v0.1.12
[INFO] [stderr]    Compiling stacker v0.1.12
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking memchr v2.3.4
[INFO] [stderr]     Checking filetime v0.2.13
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]     Checking backtrace v0.3.55
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking tester v0.6.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling automod v0.1.2
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking serde v1.0.118
[INFO] [stderr]     Checking serde_json v1.0.61
[INFO] [stderr]     Checking serde_stacker v0.1.4
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]     Checking rustfix v0.4.6
[INFO] [stderr]     Checking serde_json_v8 v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]    --> src/lib.rs:321:1
[INFO] [stdout]     |
[INFO] [stdout] 321 | #[macro_use]
[INFO] [stdout]     | ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]    --> src/lib.rs:321:1
[INFO] [stdout]     |
[INFO] [stdout] 321 | #[macro_use]
[INFO] [stdout]     | ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` 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 46.11s
[INFO] running `Command { std: "docker" "inspect" "22f0101e727ab7ac1e6f3fea2fcc761722d0fa4546e17d9ffb05c837664153dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22f0101e727ab7ac1e6f3fea2fcc761722d0fa4546e17d9ffb05c837664153dd", kill_on_drop: false }`
[INFO] [stdout] 22f0101e727ab7ac1e6f3fea2fcc761722d0fa4546e17d9ffb05c837664153dd