[INFO] cloning repository https://github.com/Equilibris/rust-hello-huffman [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Equilibris/rust-hello-huffman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEquilibris%2Frust-hello-huffman", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEquilibris%2Frust-hello-huffman'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] b029f7d5b298facbec365b1167b89427e601550e [INFO] testing Equilibris/rust-hello-huffman against 1.55.0 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEquilibris%2Frust-hello-huffman" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Equilibris/rust-hello-huffman 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/Equilibris/rust-hello-huffman [INFO] finished tweaking git repo https://github.com/Equilibris/rust-hello-huffman [INFO] tweaked toml for git repo https://github.com/Equilibris/rust-hello-huffman written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/Equilibris/rust-hello-huffman 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] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 26b3fcfefdceca15a5b875ac6aaf3711afa07845a6ae6a3c174d9f6ed84f4f51 [INFO] running `Command { std: "docker" "start" "-a" "26b3fcfefdceca15a5b875ac6aaf3711afa07845a6ae6a3c174d9f6ed84f4f51", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "26b3fcfefdceca15a5b875ac6aaf3711afa07845a6ae6a3c174d9f6ed84f4f51", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "26b3fcfefdceca15a5b875ac6aaf3711afa07845a6ae6a3c174d9f6ed84f4f51", kill_on_drop: false }` [INFO] [stdout] 26b3fcfefdceca15a5b875ac6aaf3711afa07845a6ae6a3c174d9f6ed84f4f51 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] df72f360cb17f336c3e73ceb9b575a0b39632c1669dda6effa1037c4958263a5 [INFO] running `Command { std: "docker" "start" "-a" "df72f360cb17f336c3e73ceb9b575a0b39632c1669dda6effa1037c4958263a5", kill_on_drop: false }` [INFO] [stderr] Compiling indexmap v1.7.0 [INFO] [stderr] Compiling priority-queue v1.1.1 [INFO] [stderr] Compiling huffman v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/main.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(core_intrinsics)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/main.rs:2:1 [INFO] [stdout] | [INFO] [stdout] 2 | #![feature(vec_into_raw_parts)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `huffman` due to 3 previous errors [INFO] [stdout] error: aborting due to 2 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "df72f360cb17f336c3e73ceb9b575a0b39632c1669dda6effa1037c4958263a5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "df72f360cb17f336c3e73ceb9b575a0b39632c1669dda6effa1037c4958263a5", kill_on_drop: false }` [INFO] [stdout] df72f360cb17f336c3e73ceb9b575a0b39632c1669dda6effa1037c4958263a5