[INFO] cloning repository https://github.com/Jean-Dum/Bares
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jean-Dum/Bares" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJean-Dum%2FBares", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJean-Dum%2FBares'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 950cce611d3071d1f96d8885dafde8680efc559e
[INFO] testing Jean-Dum/Bares against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJean-Dum%2FBares" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jean-Dum/Bares on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jean-Dum/Bares
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/Jean-Dum/Bares
[INFO] tweaked toml for git repo https://github.com/Jean-Dum/Bares written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Jean-Dum/Bares already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded heapless v0.5.3
[INFO] [stderr]   Downloaded ufmt-macros v0.1.1
[INFO] [stderr]   Downloaded ufmt v0.1.0
[INFO] [stderr]   Downloaded stm32f4 v0.9.0
[INFO] [stderr]   Downloaded stm32f4xx-hal v0.6.0
[INFO] [stderr]   Downloaded stm32f4 v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 883c9f17b18f69a495dcdb78dfe3ff45367690295c8d11f4e50cc1e7c4d33e9a
[INFO] running `Command { std: "docker" "start" "-a" "883c9f17b18f69a495dcdb78dfe3ff45367690295c8d11f4e50cc1e7c4d33e9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "883c9f17b18f69a495dcdb78dfe3ff45367690295c8d11f4e50cc1e7c4d33e9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "883c9f17b18f69a495dcdb78dfe3ff45367690295c8d11f4e50cc1e7c4d33e9a", kill_on_drop: false }`
[INFO] [stdout] 883c9f17b18f69a495dcdb78dfe3ff45367690295c8d11f4e50cc1e7c4d33e9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7db079c74710c3a3ae520393a2ad7211e4f5e9ec9b4bc9009036fc27ed00e8c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f7db079c74710c3a3ae520393a2ad7211e4f5e9ec9b4bc9009036fc27ed00e8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling cortex-m v0.6.2
[INFO] [stderr]    Compiling vcell v0.1.2
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.5
[INFO] [stderr]    Compiling cortex-m-rt v0.6.12
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]    Compiling heapless v0.5.3
[INFO] [stderr]    Compiling ufmt-write v0.1.0
[INFO] [stderr]    Compiling panic-halt v0.2.0
[INFO] [stderr]    Compiling nb v0.1.2
[INFO] [stderr]    Compiling generic-array v0.13.2
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling as-slice v0.1.3
[INFO] [stderr]    Compiling aligned v0.3.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cortex-m-0.6.2/src/lib.rs:32:37
[INFO] [stdout]    |
[INFO] [stdout] 32 | #![cfg_attr(feature = "inline-asm", 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` 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" "f7db079c74710c3a3ae520393a2ad7211e4f5e9ec9b4bc9009036fc27ed00e8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7db079c74710c3a3ae520393a2ad7211e4f5e9ec9b4bc9009036fc27ed00e8c", kill_on_drop: false }`
[INFO] [stdout] f7db079c74710c3a3ae520393a2ad7211e4f5e9ec9b4bc9009036fc27ed00e8c
