[INFO] cloning repository https://github.com/puma3/LittleCompiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/puma3/LittleCompiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuma3%2FLittleCompiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuma3%2FLittleCompiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 37588c3b17b6e257fd086c9965287ba644dc6140
[INFO] testing puma3/LittleCompiler against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpuma3%2FLittleCompiler" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/puma3/LittleCompiler on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/puma3/LittleCompiler
[INFO] finished tweaking git repo https://github.com/puma3/LittleCompiler
[INFO] tweaked toml for git repo https://github.com/puma3/LittleCompiler written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/puma3/LittleCompiler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 97f1a6509835ad89d9acc959798f651151d58e191bf614627550db1f4b1ba32e
[INFO] running `Command { std: "docker" "start" "-a" "97f1a6509835ad89d9acc959798f651151d58e191bf614627550db1f4b1ba32e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97f1a6509835ad89d9acc959798f651151d58e191bf614627550db1f4b1ba32e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97f1a6509835ad89d9acc959798f651151d58e191bf614627550db1f4b1ba32e", kill_on_drop: false }`
[INFO] [stdout] 97f1a6509835ad89d9acc959798f651151d58e191bf614627550db1f4b1ba32e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3e8de5a4f9b5abcf9bff17903025f76adbb01b6d0b5eb4dc15911b222517bc54
[INFO] running `Command { std: "docker" "start" "-a" "3e8de5a4f9b5abcf9bff17903025f76adbb01b6d0b5eb4dc15911b222517bc54", kill_on_drop: false }`
[INFO] [stderr]    Compiling pest v1.0.0-beta.17
[INFO] [stderr]    Compiling ansi_term v0.10.2
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling pest_derive v1.0.0-beta.17
[INFO] [stderr]    Compiling compiler v0.1.0 (/opt/rustwide/workdir/libs/compiler)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> libs/compiler/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(underscore_lifetimes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `underscore_lifetimes` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> libs/compiler/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(string_retain)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right`: superseded by `trim_end`
[INFO] [stdout]    --> libs/compiler/src/translation.rs:108:103
[INFO] [stdout]     |
[INFO] [stdout] 108 |             Rule::num | Rule::identifier => val = inner_pair.clone().into_span().as_str().to_string().trim_right().to_string(),
[INFO] [stdout]     |                                                                                                       ^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compiler` due to 3 previous errors; 1 warning emitted
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3e8de5a4f9b5abcf9bff17903025f76adbb01b6d0b5eb4dc15911b222517bc54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e8de5a4f9b5abcf9bff17903025f76adbb01b6d0b5eb4dc15911b222517bc54", kill_on_drop: false }`
[INFO] [stdout] 3e8de5a4f9b5abcf9bff17903025f76adbb01b6d0b5eb4dc15911b222517bc54