[INFO] cloning repository https://github.com/sandkoan/postfix
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sandkoan/postfix" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsandkoan%2Fpostfix", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsandkoan%2Fpostfix'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 61329cc03931869e099ede2ba64baa1a4590fd32
[INFO] testing sandkoan/postfix against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsandkoan%2Fpostfix" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sandkoan/postfix on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sandkoan/postfix
[INFO] finished tweaking git repo https://github.com/sandkoan/postfix
[INFO] tweaked toml for git repo https://github.com/sandkoan/postfix written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/sandkoan/postfix already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2cb52b00f50bdaa46b828a315b628d7ea049dad0a253cb9d024fc039dbf63e8
[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" "a2cb52b00f50bdaa46b828a315b628d7ea049dad0a253cb9d024fc039dbf63e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2cb52b00f50bdaa46b828a315b628d7ea049dad0a253cb9d024fc039dbf63e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2cb52b00f50bdaa46b828a315b628d7ea049dad0a253cb9d024fc039dbf63e8", kill_on_drop: false }`
[INFO] [stdout] a2cb52b00f50bdaa46b828a315b628d7ea049dad0a253cb9d024fc039dbf63e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 223c68ceae788d362c6d8f56880545afc84586ea7586a1473bf56c774e391222
[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" "223c68ceae788d362c6d8f56880545afc84586ea7586a1473bf56c774e391222", kill_on_drop: false }`
[INFO] [stderr]    Compiling forth v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::vec`
[INFO] [stdout]  --> src/eval.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::vec;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0369]: cannot add `&str` to `&&mut str`
[INFO] [stdout]    --> src/functions.rs:179:81
[INFO] [stdout]     |
[INFO] [stdout] 179 |             opt = word_dict.insert(def, if let Some(b) = word_dict.get(def) { b + body } else {body});
[INFO] [stdout]     |                                                                               - ^ ---- &str
[INFO] [stdout]     |                                                                               |
[INFO] [stdout]     |                                                                               &&mut str
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/functions.rs:179:96
[INFO] [stdout]     |
[INFO] [stdout] 179 |             opt = word_dict.insert(def, if let Some(b) = word_dict.get(def) { b + body } else {body});
[INFO] [stdout]     |                                                                                                ^^^^ types differ in mutability
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected mutable reference `&mut str`
[INFO] [stdout]                        found reference `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0369.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `forth` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "223c68ceae788d362c6d8f56880545afc84586ea7586a1473bf56c774e391222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "223c68ceae788d362c6d8f56880545afc84586ea7586a1473bf56c774e391222", kill_on_drop: false }`
[INFO] [stdout] 223c68ceae788d362c6d8f56880545afc84586ea7586a1473bf56c774e391222