[INFO] cloning repository https://github.com/schatzmeister/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/schatzmeister/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fschatzmeister%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fschatzmeister%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ae92f7c6296f05328f1aeb24c09a942a34655400
[INFO] checking schatzmeister/rust-playground against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fschatzmeister%2Frust-playground" "/workspace/builds/worker-97/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-97/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/schatzmeister/rust-playground on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/schatzmeister/rust-playground
[INFO] finished tweaking git repo https://github.com/schatzmeister/rust-playground
[INFO] tweaked toml for git repo https://github.com/schatzmeister/rust-playground written to /workspace/builds/worker-97/source/Cargo.toml
[INFO] crate git repo https://github.com/schatzmeister/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ca43fbba6cdd4124755d8b38c0eaafdbda942d59c0810cf466a96ab4e6d5cb7
[INFO] running `Command { std: "docker" "start" "-a" "9ca43fbba6cdd4124755d8b38c0eaafdbda942d59c0810cf466a96ab4e6d5cb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ca43fbba6cdd4124755d8b38c0eaafdbda942d59c0810cf466a96ab4e6d5cb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ca43fbba6cdd4124755d8b38c0eaafdbda942d59c0810cf466a96ab4e6d5cb7", kill_on_drop: false }`
[INFO] [stdout] 9ca43fbba6cdd4124755d8b38c0eaafdbda942d59c0810cf466a96ab4e6d5cb7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-97/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" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 849dbfe41903bdc37a984b6a08c93b095f915a22ab28efecd7f348facc816292
[INFO] running `Command { std: "docker" "start" "-a" "849dbfe41903bdc37a984b6a08c93b095f915a22ab28efecd7f348facc816292", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `member_constraints` has been stable since 1.54.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(member_constraints)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `member_constraints` has been stable since 1.54.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(member_constraints)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "849dbfe41903bdc37a984b6a08c93b095f915a22ab28efecd7f348facc816292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "849dbfe41903bdc37a984b6a08c93b095f915a22ab28efecd7f348facc816292", kill_on_drop: false }`
[INFO] [stdout] 849dbfe41903bdc37a984b6a08c93b095f915a22ab28efecd7f348facc816292