[INFO] fetching crate msp430fr2x5x-hal 0.4.1...
[INFO] testing msp430fr2x5x-hal-0.4.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate msp430fr2x5x-hal 0.4.1 into /workspace/builds/worker-0-tc1/source
[INFO] removed /workspace/builds/worker-0-tc1/source/.cargo/config
[INFO] removed /workspace/builds/worker-0-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate msp430fr2x5x-hal 0.4.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate msp430fr2x5x-hal 0.4.1
[INFO] tweaked toml for crates.io crate msp430fr2x5x-hal 0.4.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate msp430fr2x5x-hal 0.4.1 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 msp430fr2x5x-hal 0.4.1 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 msp430-rt v0.4.0
[INFO] [stderr]   Downloaded critical-section v1.1.1
[INFO] [stderr]   Downloaded msp430-rt-macros v0.4.0
[INFO] [stderr]   Downloaded panic-msp430 v0.4.0
[INFO] [stderr]   Downloaded nb v1.0.0
[INFO] [stderr]   Downloaded msp430 v0.4.0
[INFO] [stderr]   Downloaded panic-never v0.1.0
[INFO] [stderr]   Downloaded portable-atomic v0.3.18
[INFO] [stderr]   Downloaded syn v1.0.102
[INFO] [stderr]   Downloaded msp430fr2355 v0.5.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 16af69484eabfa0b0964a9b371510218ae7f348bfc479b8c5505831c17d4eb1e
[INFO] running `Command { std: "docker" "start" "-a" "16af69484eabfa0b0964a9b371510218ae7f348bfc479b8c5505831c17d4eb1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "16af69484eabfa0b0964a9b371510218ae7f348bfc479b8c5505831c17d4eb1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16af69484eabfa0b0964a9b371510218ae7f348bfc479b8c5505831c17d4eb1e", kill_on_drop: false }`
[INFO] [stdout] 16af69484eabfa0b0964a9b371510218ae7f348bfc479b8c5505831c17d4eb1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 7c3d6e9389d07d9ec2fefc31a1125d5b3c4be874452bf0978dfc15f3ba78dee7
[INFO] running `Command { std: "docker" "start" "-a" "7c3d6e9389d07d9ec2fefc31a1125d5b3c4be874452bf0978dfc15f3ba78dee7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.102
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling portable-atomic v0.3.18
[INFO] [stderr]    Compiling msp430-rt v0.4.0
[INFO] [stderr]    Compiling critical-section v1.1.1
[INFO] [stderr]    Compiling msp430 v0.4.0
[INFO] [stderr]    Compiling nb v1.0.0
[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/msp430-0.4.0/src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(asm_experimental_arch)]
[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 `msp430` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7c3d6e9389d07d9ec2fefc31a1125d5b3c4be874452bf0978dfc15f3ba78dee7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c3d6e9389d07d9ec2fefc31a1125d5b3c4be874452bf0978dfc15f3ba78dee7", kill_on_drop: false }`
[INFO] [stdout] 7c3d6e9389d07d9ec2fefc31a1125d5b3c4be874452bf0978dfc15f3ba78dee7