[INFO] fetching crate mag_lang 0.1.0...
[INFO] testing mag_lang-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate mag_lang 0.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate mag_lang 0.1.0
[INFO] finished tweaking crates.io crate mag_lang 0.1.0
[INFO] tweaked toml for crates.io crate mag_lang 0.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mag_lang 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mag_lang 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pest_meta v2.7.4
[INFO] [stderr]   Downloaded serde_derive v1.0.189
[INFO] [stderr]   Downloaded smallstr v0.2.0
[INFO] [stderr]   Downloaded pest_generator v2.7.4
[INFO] [stderr]   Downloaded clap_lex v0.1.1
[INFO] [stderr]   Downloaded parking_lot_core v0.9.6
[INFO] [stderr]   Downloaded terminfo v0.8.0
[INFO] [stderr]   Downloaded mortal v0.2.4
[INFO] [stderr]   Downloaded pest v2.7.4
[INFO] [stderr]   Downloaded clap v3.1.12
[INFO] [stderr]   Downloaded linefeed v0.6.0
[INFO] [stderr]   Downloaded serde v1.0.189
[INFO] [stderr]   Downloaded dialoguer v0.10.1
[INFO] [stderr]   Downloaded pest_derive v2.7.4
[INFO] [stderr]   Downloaded colored v2.0.0
[INFO] [stderr]   Downloaded dirs v4.0.0
[INFO] [stderr]   Downloaded strontium v0.6.0
[INFO] [stderr]   Downloaded zeroize v1.5.5
[INFO] [stderr]   Downloaded magc v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b66df5d78e678f59953907479fa46b0d0e703fdbdc2a2686fdf0da5edcede531
[INFO] running `Command { std: "docker" "start" "-a" "b66df5d78e678f59953907479fa46b0d0e703fdbdc2a2686fdf0da5edcede531", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b66df5d78e678f59953907479fa46b0d0e703fdbdc2a2686fdf0da5edcede531", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b66df5d78e678f59953907479fa46b0d0e703fdbdc2a2686fdf0da5edcede531", kill_on_drop: false }`
[INFO] [stdout] b66df5d78e678f59953907479fa46b0d0e703fdbdc2a2686fdf0da5edcede531
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9718d69ade4637befcdd098afe0b349e6387e2c7dad0b4537a926975a65da826
[INFO] running `Command { std: "docker" "start" "-a" "9718d69ade4637befcdd098afe0b349e6387e2c7dad0b4537a926975a65da826", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling phf_shared v0.11.2
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling bitflags v2.4.0
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.6
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling phf v0.11.2
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling smallstr v0.2.0
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stderr]    Compiling textwrap v0.15.0
[INFO] [stderr]    Compiling fastrand v1.7.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_lex v0.1.1
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]    Compiling phf_codegen v0.11.2
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling nix v0.26.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling terminfo v0.8.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling dirs v4.0.0
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling mio v0.8.5
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling zeroize v1.5.5
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling signal-hook-mio v0.2.3
[INFO] [stderr]    Compiling crossterm v0.25.0
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling indicatif v0.16.2
[INFO] [stderr]    Compiling dialoguer v0.10.1
[INFO] [stderr]    Compiling clap_derive v3.1.7
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]    Compiling serde_derive v1.0.189
[INFO] [stderr]    Compiling num-derive v0.4.1
[INFO] [stderr]    Compiling pest v2.7.4
[INFO] [stderr]    Compiling clap v3.1.12
[INFO] [stderr]    Compiling pest_meta v2.7.4
[INFO] [stderr]    Compiling pest_generator v2.7.4
[INFO] [stderr]    Compiling mortal v0.2.4
[INFO] [stderr]    Compiling linefeed v0.6.0
[INFO] [stderr]    Compiling pest_derive v2.7.4
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling strontium v0.6.0
[INFO] [stderr]    Compiling magc v0.1.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/magc-0.1.0/src/lib.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | #![feature(type_ascription)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `magc` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9718d69ade4637befcdd098afe0b349e6387e2c7dad0b4537a926975a65da826", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9718d69ade4637befcdd098afe0b349e6387e2c7dad0b4537a926975a65da826", kill_on_drop: false }`
[INFO] [stdout] 9718d69ade4637befcdd098afe0b349e6387e2c7dad0b4537a926975a65da826