[INFO] cloning repository https://github.com/adamgreig/cortex-m-asm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adamgreig/cortex-m-asm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadamgreig%2Fcortex-m-asm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadamgreig%2Fcortex-m-asm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 60bd35e0ca2028d381199f4b44aeeabbdf90c465
[INFO] testing adamgreig/cortex-m-asm against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadamgreig%2Fcortex-m-asm" "/workspace/builds/worker-84/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-84/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/adamgreig/cortex-m-asm 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/adamgreig/cortex-m-asm
[INFO] finished tweaking git repo https://github.com/adamgreig/cortex-m-asm
[INFO] tweaked toml for git repo https://github.com/adamgreig/cortex-m-asm written to /workspace/builds/worker-84/source/Cargo.toml
[INFO] crate git repo https://github.com/adamgreig/cortex-m-asm 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-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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] f14bd5c240ee8b10bf32f0c80ae47f7a731223e2c4778b5548163f3e2d76f5dd
[INFO] running `Command { std: "docker" "start" "-a" "f14bd5c240ee8b10bf32f0c80ae47f7a731223e2c4778b5548163f3e2d76f5dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f14bd5c240ee8b10bf32f0c80ae47f7a731223e2c4778b5548163f3e2d76f5dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f14bd5c240ee8b10bf32f0c80ae47f7a731223e2c4778b5548163f3e2d76f5dd", kill_on_drop: false }`
[INFO] [stdout] f14bd5c240ee8b10bf32f0c80ae47f7a731223e2c4778b5548163f3e2d76f5dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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] f52ba5639559c576da741db6ca4cc76f9f26ac9927d6ed0037a001952d5964a9
[INFO] running `Command { std: "docker" "start" "-a" "f52ba5639559c576da741db6ca4cc76f9f26ac9927d6ed0037a001952d5964a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m-asm v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown lint: `missing_safety_doc`
[INFO] [stdout]  --> src/lib.rs:7:25
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![allow(unused_unsafe, missing_safety_doc)]
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(asm)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cortex-m-asm` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f52ba5639559c576da741db6ca4cc76f9f26ac9927d6ed0037a001952d5964a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f52ba5639559c576da741db6ca4cc76f9f26ac9927d6ed0037a001952d5964a9", kill_on_drop: false }`
[INFO] [stdout] f52ba5639559c576da741db6ca4cc76f9f26ac9927d6ed0037a001952d5964a9