[INFO] cloning repository https://github.com/simbo1905/extension_methods
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/simbo1905/extension_methods" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimbo1905%2Fextension_methods", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimbo1905%2Fextension_methods'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 296854516f81850d2dd31dfec6ea8f4ac3d45957
[INFO] checking simbo1905/extension_methods against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimbo1905%2Fextension_methods" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/simbo1905/extension_methods on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/simbo1905/extension_methods
[INFO] finished tweaking git repo https://github.com/simbo1905/extension_methods
[INFO] tweaked toml for git repo https://github.com/simbo1905/extension_methods written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/simbo1905/extension_methods already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef65701d6ddcba9766bbf429a5cb10bb8a6c07c6a8afa94d5c7c763ca7efae83
[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" "ef65701d6ddcba9766bbf429a5cb10bb8a6c07c6a8afa94d5c7c763ca7efae83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef65701d6ddcba9766bbf429a5cb10bb8a6c07c6a8afa94d5c7c763ca7efae83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef65701d6ddcba9766bbf429a5cb10bb8a6c07c6a8afa94d5c7c763ca7efae83", kill_on_drop: false }`
[INFO] [stdout] ef65701d6ddcba9766bbf429a5cb10bb8a6c07c6a8afa94d5c7c763ca7efae83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8576adbc1b5bfe16ea6567b23ad5049f692ec1dca1b7a2e765f2f6c387ec36cb
[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" "8576adbc1b5bfe16ea6567b23ad5049f692ec1dca1b7a2e765f2f6c387ec36cb", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v1.0.10
[INFO] [stderr]     Checking num-traits v0.1.39
[INFO] [stderr]     Checking some_library v0.1.0 (/opt/rustwide/workdir/some_library)
[INFO] [stderr]    Compiling serde_derive_internals v0.15.1
[INFO] [stderr]    Compiling serde_derive v1.0.10
[INFO] [stderr]     Checking serde_json v1.0.2
[INFO] [stderr]     Checking some_extension v0.1.0 (/opt/rustwide/workdir/some_extension)
[INFO] [stderr]     Checking extension_methods v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.11s
[INFO] running `Command { std: "docker" "inspect" "8576adbc1b5bfe16ea6567b23ad5049f692ec1dca1b7a2e765f2f6c387ec36cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8576adbc1b5bfe16ea6567b23ad5049f692ec1dca1b7a2e765f2f6c387ec36cb", kill_on_drop: false }`
[INFO] [stdout] 8576adbc1b5bfe16ea6567b23ad5049f692ec1dca1b7a2e765f2f6c387ec36cb