[INFO] cloning repository https://github.com/Gallium70/lrv-rust-bl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Gallium70/lrv-rust-bl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGallium70%2Flrv-rust-bl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGallium70%2Flrv-rust-bl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a06ebd0d383a34640e155dd8b856929356f50673
[INFO] testing Gallium70/lrv-rust-bl against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGallium70%2Flrv-rust-bl" "/workspace/builds/worker-49/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-49/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Gallium70/lrv-rust-bl 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] removed /workspace/builds/worker-49/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/Gallium70/lrv-rust-bl
[INFO] finished tweaking git repo https://github.com/Gallium70/lrv-rust-bl
[INFO] tweaked toml for git repo https://github.com/Gallium70/lrv-rust-bl written to /workspace/builds/worker-49/source/Cargo.toml
[INFO] crate git repo https://github.com/Gallium70/lrv-rust-bl 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]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.7.1
[INFO] [stderr]   Downloaded bare-metal v0.2.5
[INFO] [stderr]   Downloaded bare-metal v1.0.0
[INFO] [stderr]   Downloaded embedded-hal v1.0.0-alpha.4
[INFO] [stderr]   Downloaded riscv-target v0.1.2
[INFO] [stderr]   Downloaded r0 v1.0.0
[INFO] [stderr]   Downloaded bit_field v0.10.1
[INFO] [stderr]   Downloaded spinning_top v0.2.4
[INFO] [stderr]   Downloaded linked_list_allocator v0.9.0
[INFO] [stderr]   Downloaded riscv v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 9b4140e1021052b4eea4ce886cf26e91d45de1840734b53934a1b2766ce96eda
[INFO] running `Command { std: "docker" "start" "-a" "9b4140e1021052b4eea4ce886cf26e91d45de1840734b53934a1b2766ce96eda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b4140e1021052b4eea4ce886cf26e91d45de1840734b53934a1b2766ce96eda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b4140e1021052b4eea4ce886cf26e91d45de1840734b53934a1b2766ce96eda", kill_on_drop: false }`
[INFO] [stdout] 9b4140e1021052b4eea4ce886cf26e91d45de1840734b53934a1b2766ce96eda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 1bec6e909f178f535504acc4e73872c7acf4d2ac033a38af335edfef83faf424
[INFO] running `Command { std: "docker" "start" "-a" "1bec6e909f178f535504acc4e73872c7acf4d2ac033a38af335edfef83faf424", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling nb v1.0.0
[INFO] [stderr]    Compiling lrv-rust-bl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling bare-metal v1.0.0
[INFO] [stderr]    Compiling spin v0.7.1
[INFO] [stderr]    Compiling r0 v1.0.0
[INFO] [stderr]    Compiling device_tree v1.0.3 (https://github.com/rcore-os/device_tree-rs/#b89dffc9)
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling embedded-hal v1.0.0-alpha.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[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/lock_api-0.4.4/src/lib.rs:91:34
[INFO] [stdout]    |
[INFO] [stdout] 91 | #![cfg_attr(feature = "nightly", feature(const_fn_trait_bound))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling semver v0.9.0
[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 `lock_api` 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" "1bec6e909f178f535504acc4e73872c7acf4d2ac033a38af335edfef83faf424", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bec6e909f178f535504acc4e73872c7acf4d2ac033a38af335edfef83faf424", kill_on_drop: false }`
[INFO] [stdout] 1bec6e909f178f535504acc4e73872c7acf4d2ac033a38af335edfef83faf424