[INFO] cloning repository https://github.com/benjcollins/compiler2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/benjcollins/compiler2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbenjcollins%2Fcompiler2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbenjcollins%2Fcompiler2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8dad9c335ab40f3baeffc1e2b64152741f0b7f45
[INFO] testing benjcollins/compiler2 against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbenjcollins%2Fcompiler2" "/workspace/builds/worker-113/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-113/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/benjcollins/compiler2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/benjcollins/compiler2
[INFO] finished tweaking git repo https://github.com/benjcollins/compiler2
[INFO] tweaked toml for git repo https://github.com/benjcollins/compiler2 written to /workspace/builds/worker-113/source/Cargo.toml
[INFO] crate git repo https://github.com/benjcollins/compiler2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9ffbfc5abd52ac2cb6b997af12b5c19727f54f1c77fefee9fa118e1859b73db
[INFO] running `Command { std: "docker" "start" "-a" "b9ffbfc5abd52ac2cb6b997af12b5c19727f54f1c77fefee9fa118e1859b73db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9ffbfc5abd52ac2cb6b997af12b5c19727f54f1c77fefee9fa118e1859b73db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9ffbfc5abd52ac2cb6b997af12b5c19727f54f1c77fefee9fa118e1859b73db", kill_on_drop: false }`
[INFO] [stdout] b9ffbfc5abd52ac2cb6b997af12b5c19727f54f1c77fefee9fa118e1859b73db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f48f16e7cf984de87660c66e995b64d206a77109f7e0fa2c160868c0b960e464
[INFO] running `Command { std: "docker" "start" "-a" "f48f16e7cf984de87660c66e995b64d206a77109f7e0fa2c160868c0b960e464", kill_on_drop: false }`
[INFO] [stderr]    Compiling compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `.`, `;`, `?`, `}`, or an operator, found `scope`
[INFO] [stdout]   --> src/types.rs:27:25
[INFO] [stdout]    |
[INFO] [stdout] 26 |                         unify_types(ty, b)
[INFO] [stdout]    |                                           - expected one of `.`, `;`, `?`, `}`, or an operator
[INFO] [stdout] 27 |                         scope.insert(ident, Rc::new(RefCell::new(ty)));
[INFO] [stdout]    |                         ^^^^^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `scope` in this scope
[INFO] [stdout]   --> src/types.rs:70:28
[INFO] [stdout]    |
[INFO] [stdout] 70 |         type_of_expr(expr, scope);
[INFO] [stdout]    |                            ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0106]: missing lifetime specifier
[INFO] [stdout]   --> src/types.rs:58:20
[INFO] [stdout]    |
[INFO] [stdout] 58 |     TupleIter(Iter<Expr<'a>>),
[INFO] [stdout]    |                    ^ expected named lifetime parameter
[INFO] [stdout]    |
[INFO] [stdout] help: consider using the `'a` lifetime
[INFO] [stdout]    |
[INFO] [stdout] 58 |     TupleIter(Iter<'a, Expr<'a>>),
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0477]: the type `Expr<'a>` does not fulfill the required lifetime
[INFO] [stdout]   --> src/types.rs:58:15
[INFO] [stdout]    |
[INFO] [stdout] 58 |     TupleIter(Iter<Expr<'a>>),
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: type must satisfy the static lifetime
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0106, E0425, E0477.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0106`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compiler` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "f48f16e7cf984de87660c66e995b64d206a77109f7e0fa2c160868c0b960e464", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f48f16e7cf984de87660c66e995b64d206a77109f7e0fa2c160868c0b960e464", kill_on_drop: false }`
[INFO] [stdout] f48f16e7cf984de87660c66e995b64d206a77109f7e0fa2c160868c0b960e464