[INFO] fetching crate nspire 0.5.2...
[INFO] testing nspire-0.5.2 against 1.54.0 for beta-1.55-1
[INFO] extracting crate nspire 0.5.2 into /workspace/builds/worker-102/source
[INFO] validating manifest of crates.io crate nspire 0.5.2 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nspire 0.5.2
[INFO] finished tweaking crates.io crate nspire 0.5.2
[INFO] tweaked toml for crates.io crate nspire 0.5.2 written to /workspace/builds/worker-102/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 463924b0fc053e7fa84b8dc863f36328c51069293d278a45ae22c87a00c18c33
[INFO] running `Command { std: "docker" "start" "-a" "463924b0fc053e7fa84b8dc863f36328c51069293d278a45ae22c87a00c18c33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "463924b0fc053e7fa84b8dc863f36328c51069293d278a45ae22c87a00c18c33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "463924b0fc053e7fa84b8dc863f36328c51069293d278a45ae22c87a00c18c33", kill_on_drop: false }`
[INFO] [stdout] 463924b0fc053e7fa84b8dc863f36328c51069293d278a45ae22c87a00c18c33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f88fdf8ca51a2209a18cdc89654a359d644e5c0dc6b19bbcb82ab9b0f4bbb6be
[INFO] running `Command { std: "docker" "start" "-a" "f88fdf8ca51a2209a18cdc89654a359d644e5c0dc6b19bbcb82ab9b0f4bbb6be", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling cty v0.1.5
[INFO] [stderr]    Compiling ndless-sys v0.1.3
[INFO] [stderr]    Compiling cstr_core v0.1.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cstr_core-0.1.2/src/lib.rs:12:32
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature = "alloc", feature(alloc))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cstr_core`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "f88fdf8ca51a2209a18cdc89654a359d644e5c0dc6b19bbcb82ab9b0f4bbb6be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f88fdf8ca51a2209a18cdc89654a359d644e5c0dc6b19bbcb82ab9b0f4bbb6be", kill_on_drop: false }`
[INFO] [stdout] f88fdf8ca51a2209a18cdc89654a359d644e5c0dc6b19bbcb82ab9b0f4bbb6be
