[INFO] fetching crate cursed_strings 0.1.1...
[INFO] testing cursed_strings-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate cursed_strings 0.1.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate cursed_strings 0.1.1 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 crates.io crate cursed_strings 0.1.1
[INFO] finished tweaking crates.io crate cursed_strings 0.1.1
[INFO] tweaked toml for crates.io crate cursed_strings 0.1.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 5fbf13c0c91a24966a6ef545a7cc046f53d234ec2ddc5e1f6e2fb2af8b98624e
[INFO] running `Command { std: "docker" "start" "-a" "5fbf13c0c91a24966a6ef545a7cc046f53d234ec2ddc5e1f6e2fb2af8b98624e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fbf13c0c91a24966a6ef545a7cc046f53d234ec2ddc5e1f6e2fb2af8b98624e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fbf13c0c91a24966a6ef545a7cc046f53d234ec2ddc5e1f6e2fb2af8b98624e", kill_on_drop: false }`
[INFO] [stdout] 5fbf13c0c91a24966a6ef545a7cc046f53d234ec2ddc5e1f6e2fb2af8b98624e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] d832a8884b03f1da729b534ffdf8c906007333c42b26980ff0445814dfeeb15d
[INFO] running `Command { std: "docker" "start" "-a" "d832a8884b03f1da729b534ffdf8c906007333c42b26980ff0445814dfeeb15d", kill_on_drop: false }`
[INFO] [stderr]    Compiling cursed_strings v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(str_internals)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![feature(vec_into_raw_parts)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `str` should have an upper camel case name
[INFO] [stdout]   --> src/lib.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub type str = string_base::StringBase<[u8]>;
[INFO] [stdout]    |          ^^^ help: convert the identifier to upper camel case (notice the capitalization): `Str`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cursed_strings` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "d832a8884b03f1da729b534ffdf8c906007333c42b26980ff0445814dfeeb15d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d832a8884b03f1da729b534ffdf8c906007333c42b26980ff0445814dfeeb15d", kill_on_drop: false }`
[INFO] [stdout] d832a8884b03f1da729b534ffdf8c906007333c42b26980ff0445814dfeeb15d