[INFO] fetching crate serde_stacker 0.1.4...
[INFO] checking serde_stacker-0.1.4 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate serde_stacker 0.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate serde_stacker 0.1.4 on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_stacker 0.1.4
[INFO] finished tweaking crates.io crate serde_stacker 0.1.4
[INFO] tweaked toml for crates.io crate serde_stacker 0.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", 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] 906bd4ad2f8e4a593e895c3ff80bed27f3019716d9cfed0589efacfd46694f5f
[INFO] running `Command { std: "docker" "start" "-a" "906bd4ad2f8e4a593e895c3ff80bed27f3019716d9cfed0589efacfd46694f5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "906bd4ad2f8e4a593e895c3ff80bed27f3019716d9cfed0589efacfd46694f5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "906bd4ad2f8e4a593e895c3ff80bed27f3019716d9cfed0589efacfd46694f5f", kill_on_drop: false }`
[INFO] [stdout] 906bd4ad2f8e4a593e895c3ff80bed27f3019716d9cfed0589efacfd46694f5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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] 9181db9016d708da8a9bfa947e0cbe53b36093f0d069aa1ff8a276b0bd3619cf
[INFO] running `Command { std: "docker" "start" "-a" "9181db9016d708da8a9bfa947e0cbe53b36093f0d069aa1ff8a276b0bd3619cf", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling serde v1.0.128
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling psm v0.1.15
[INFO] [stderr]    Compiling stacker v0.1.14
[INFO] [stderr]     Checking serde_stacker v0.1.4 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/test.rs from 2018 edition to 2021
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.69s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking serde_stacker v0.1.4 (/tmp/fixit)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "9181db9016d708da8a9bfa947e0cbe53b36093f0d069aa1ff8a276b0bd3619cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9181db9016d708da8a9bfa947e0cbe53b36093f0d069aa1ff8a276b0bd3619cf", kill_on_drop: false }`
[INFO] [stdout] 9181db9016d708da8a9bfa947e0cbe53b36093f0d069aa1ff8a276b0bd3619cf