[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 master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsammartin51%2Fgamma" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sammartin51/gamma on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-6/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b69c7251dbdae4d50dcc8718f00c87be67025185c7c2bc85acf11040742e0d5
[INFO] running `Command { std: "docker" "start" "-a" "5b69c7251dbdae4d50dcc8718f00c87be67025185c7c2bc85acf11040742e0d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b69c7251dbdae4d50dcc8718f00c87be67025185c7c2bc85acf11040742e0d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b69c7251dbdae4d50dcc8718f00c87be67025185c7c2bc85acf11040742e0d5", kill_on_drop: false }`
[INFO] [stdout] 5b69c7251dbdae4d50dcc8718f00c87be67025185c7c2bc85acf11040742e0d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0afe7b0523279c9e6112781cc5883e96e270cf7c353f4ac8563fb678ebc2da0e
[INFO] running `Command { std: "docker" "start" "-a" "0afe7b0523279c9e6112781cc5883e96e270cf7c353f4ac8563fb678ebc2da0e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 the macro `println` (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] [stderr] error: could not compile `hello_world` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 the macro `println` (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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0afe7b0523279c9e6112781cc5883e96e270cf7c353f4ac8563fb678ebc2da0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0afe7b0523279c9e6112781cc5883e96e270cf7c353f4ac8563fb678ebc2da0e", kill_on_drop: false }`
[INFO] [stdout] 0afe7b0523279c9e6112781cc5883e96e270cf7c353f4ac8563fb678ebc2da0e