[INFO] cloning repository https://github.com/sammartin51/gamma
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sammartin51/gamma" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsammartin51%2Fgamma", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsammartin51%2Fgamma'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b9af73f8d8b518784dd9ca0b4a73b61eee9e040
[INFO] checking sammartin51/gamma against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsammartin51%2Fgamma" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sammartin51/gamma on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sammartin51/gamma
[INFO] finished tweaking git repo https://github.com/sammartin51/gamma
[INFO] tweaked toml for git repo https://github.com/sammartin51/gamma written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/sammartin51/gamma already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6f645121c610e3e2ad383420fd0435641c7916972772d3ed0200a3d83390251
[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" "a6f645121c610e3e2ad383420fd0435641c7916972772d3ed0200a3d83390251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6f645121c610e3e2ad383420fd0435641c7916972772d3ed0200a3d83390251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6f645121c610e3e2ad383420fd0435641c7916972772d3ed0200a3d83390251", kill_on_drop: false }`
[INFO] [stdout] a6f645121c610e3e2ad383420fd0435641c7916972772d3ed0200a3d83390251
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de943cbb6536f857db1fbaa0b66dcf46cbd5373b6c6c1ed199c82d703038a267
[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" "de943cbb6536f857db1fbaa0b66dcf46cbd5373b6c6c1ed199c82d703038a267", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.1.37
[INFO] [stderr]     Checking libc v0.2.23
[INFO] [stderr]     Checking text_io v0.1.6
[INFO] [stderr]     Checking time v0.1.37
[INFO] [stderr]     Checking num-integer v0.1.34
[INFO] [stderr]     Checking num-iter v0.1.33
[INFO] [stderr]     Checking num v0.1.37
[INFO] [stderr]     Checking chrono v0.3.1
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:44:18
[INFO] [stdout]    |
[INFO] [stdout] 44 |             _ => println!("try again")
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^ expected struct `NodeZipper`, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `NodeZipper<Task>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:44:18
[INFO] [stdout]    |
[INFO] [stdout] 44 |             _ => println!("try again")
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^ expected struct `NodeZipper`, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `NodeZipper<Task>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello_world`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "de943cbb6536f857db1fbaa0b66dcf46cbd5373b6c6c1ed199c82d703038a267", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de943cbb6536f857db1fbaa0b66dcf46cbd5373b6c6c1ed199c82d703038a267", kill_on_drop: false }`
[INFO] [stdout] de943cbb6536f857db1fbaa0b66dcf46cbd5373b6c6c1ed199c82d703038a267