[INFO] cloning repository https://github.com/hmvp/rust_poc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hmvp/rust_poc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhmvp%2Frust_poc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhmvp%2Frust_poc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 833b420924dfd02ef23571f1a49c7033c3886a88
[INFO] testing hmvp/rust_poc against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhmvp%2Frust_poc" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  95% (42/44)
Updating files:  97% (43/44)
Updating files: 100% (44/44)
Updating files: 100% (44/44), done.
[INFO] validating manifest of git repo https://github.com/hmvp/rust_poc on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-28/source/.cargo/config
[INFO] started tweaking git repo https://github.com/hmvp/rust_poc
[INFO] finished tweaking git repo https://github.com/hmvp/rust_poc
[INFO] tweaked toml for git repo https://github.com/hmvp/rust_poc written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/hmvp/rust_poc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 388ed3cf683f77fa6c832c3e436c2209945e2098809326d883ae2a3e96459ff7
[INFO] running `Command { std: "docker" "start" "-a" "388ed3cf683f77fa6c832c3e436c2209945e2098809326d883ae2a3e96459ff7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "388ed3cf683f77fa6c832c3e436c2209945e2098809326d883ae2a3e96459ff7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "388ed3cf683f77fa6c832c3e436c2209945e2098809326d883ae2a3e96459ff7", kill_on_drop: false }`
[INFO] [stdout] 388ed3cf683f77fa6c832c3e436c2209945e2098809326d883ae2a3e96459ff7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c536815ce3b76eb6fa7f17b0512d2e63c7927af4114a9bc5f2dd89aaf2cdb899
[INFO] running `Command { std: "docker" "start" "-a" "c536815ce3b76eb6fa7f17b0512d2e63c7927af4114a9bc5f2dd89aaf2cdb899", kill_on_drop: false }`
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.2.6
[INFO] [stderr]    Compiling cortex-m-semihosting v0.1.3
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling typenum v1.8.0
[INFO] [stderr]    Compiling cortex-m-rt v0.2.1
[INFO] [stderr]    Compiling r0 v0.2.1
[INFO] [stderr]    Compiling static-ref v0.1.0
[INFO] [stderr]    Compiling rust_poc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling cast v0.2.2
[INFO] [stderr]    Compiling volatile-register v0.2.0
[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/cortex-m-semihosting-0.1.3/src/lib.rs:105:12
[INFO] [stdout]     |
[INFO] [stdout] 105 | #![feature(asm)]
[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 `cortex-m-semihosting` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c536815ce3b76eb6fa7f17b0512d2e63c7927af4114a9bc5f2dd89aaf2cdb899", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c536815ce3b76eb6fa7f17b0512d2e63c7927af4114a9bc5f2dd89aaf2cdb899", kill_on_drop: false }`
[INFO] [stdout] c536815ce3b76eb6fa7f17b0512d2e63c7927af4114a9bc5f2dd89aaf2cdb899