[INFO] fetching crate r3_port_arm_m 0.1.1...
[INFO] testing r3_port_arm_m-0.1.1 against 1.54.0 for beta-1.55-1
[INFO] extracting crate r3_port_arm_m 0.1.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate r3_port_arm_m 0.1.1 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 r3_port_arm_m 0.1.1
[INFO] finished tweaking crates.io crate r3_port_arm_m 0.1.1
[INFO] tweaked toml for crates.io crate r3_port_arm_m 0.1.1 written to /workspace/builds/worker-5/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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 7b356121f6ca5e8d6c3a13001a5583c3dfe75badca0a8cb669cd6b697c61a660
[INFO] running `Command { std: "docker" "start" "-a" "7b356121f6ca5e8d6c3a13001a5583c3dfe75badca0a8cb669cd6b697c61a660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b356121f6ca5e8d6c3a13001a5583c3dfe75badca0a8cb669cd6b697c61a660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b356121f6ca5e8d6c3a13001a5583c3dfe75badca0a8cb669cd6b697c61a660", kill_on_drop: false }`
[INFO] [stdout] 7b356121f6ca5e8d6c3a13001a5583c3dfe75badca0a8cb669cd6b697c61a660
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 0518faab297a8e1b85d3298cef6c59d233829f23de52711aff2c81d8c171a212
[INFO] running `Command { std: "docker" "start" "-a" "0518faab297a8e1b85d3298cef6c59d233829f23de52711aff2c81d8c171a212", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling pom v1.1.0
[INFO] [stderr]    Compiling svg v0.5.12
[INFO] [stderr]    Compiling staticvec v0.10.8
[INFO] [stderr]    Compiling tokenlock v0.3.4
[INFO] [stderr]    Compiling r3_port_arm_m v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling num-traits v0.2.14
[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/staticvec-0.10.8/src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | / #![feature(
[INFO] [stdout] 32 | |   const_assume,
[INFO] [stdout] 33 | |   const_evaluatable_checked,
[INFO] [stdout] 34 | |   const_fn_floating_point_arithmetic,
[INFO] [stdout] ...  |
[INFO] [stdout] 70 | |   untagged_unions
[INFO] [stdout] 71 | | )]
[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 `staticvec`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0518faab297a8e1b85d3298cef6c59d233829f23de52711aff2c81d8c171a212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0518faab297a8e1b85d3298cef6c59d233829f23de52711aff2c81d8c171a212", kill_on_drop: false }`
[INFO] [stdout] 0518faab297a8e1b85d3298cef6c59d233829f23de52711aff2c81d8c171a212
