[INFO] cloning repository https://github.com/jonlamb-gh/oxcc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jonlamb-gh/oxcc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonlamb-gh%2Foxcc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonlamb-gh%2Foxcc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc972136b189735a6f59543b665c92bb39f6501c
[INFO] testing jonlamb-gh/oxcc against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonlamb-gh%2Foxcc" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jonlamb-gh/oxcc on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3/source/.cargo/config
[INFO] started tweaking git repo https://github.com/jonlamb-gh/oxcc
[INFO] finished tweaking git repo https://github.com/jonlamb-gh/oxcc
[INFO] tweaked toml for git repo https://github.com/jonlamb-gh/oxcc written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jonlamb-gh/oxcc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cast v0.2.2
[INFO] [stderr]   Downloaded vcell v0.1.0
[INFO] [stderr]   Downloaded num-complex v0.2.0
[INFO] [stderr]   Downloaded proc-macro2 v0.4.19
[INFO] [stderr]   Downloaded embedded-hal v0.2.1
[INFO] [stderr]   Downloaded rand v0.5.5
[INFO] [stderr]   Downloaded nb v0.1.1
[INFO] [stderr]   Downloaded syn v0.15.8
[INFO] [stderr]   Downloaded bare-metal v0.2.3
[INFO] [stderr]   Downloaded rand_core v0.2.1
[INFO] [stderr]   Downloaded aligned v0.2.0
[INFO] [stderr]   Downloaded oxcc-nucleo-f767zi v0.1.1
[INFO] [stderr]   Downloaded panic-semihosting v0.5.0
[INFO] [stderr]   Downloaded cortex-m v0.5.7
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.1.2
[INFO] [stderr]   Downloaded embedded_types v0.3.2
[INFO] [stderr]   Downloaded cortex-m-semihosting v0.3.1
[INFO] [stderr]   Downloaded cortex-m-rt v0.6.4
[INFO] [stderr]   Downloaded oxcc-stm32f767-hal v0.2.0
[INFO] [stderr]   Downloaded oxcc-stm32f767 v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0d1253de437b817ee499eea8cecc583a3e00f8752f91f622ad265fc4089e495
[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" "a0d1253de437b817ee499eea8cecc583a3e00f8752f91f622ad265fc4089e495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0d1253de437b817ee499eea8cecc583a3e00f8752f91f622ad265fc4089e495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0d1253de437b817ee499eea8cecc583a3e00f8752f91f622ad265fc4089e495", kill_on_drop: false }`
[INFO] [stdout] a0d1253de437b817ee499eea8cecc583a3e00f8752f91f622ad265fc4089e495
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75d6be518decf615fd299a9e5a6485fbaf7ea7a870d95ec3c7c4cbf6369904db
[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" "75d6be518decf615fd299a9e5a6485fbaf7ea7a870d95ec3c7c4cbf6369904db", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling cortex-m-rt v0.6.4
[INFO] [stderr]    Compiling cortex-m v0.5.7
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling oxcc-stm32f767 v0.1.0
[INFO] [stderr]    Compiling bare-metal v0.2.3
[INFO] [stderr]    Compiling aligned v0.2.0
[INFO] [stderr]    Compiling r0 v0.2.2
[INFO] [stderr]    Compiling nb v0.1.1
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]    Compiling num-rational v0.2.1
[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/bare-metal-0.2.3/src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     feature(const_fn)
[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 `bare-metal`
[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" "75d6be518decf615fd299a9e5a6485fbaf7ea7a870d95ec3c7c4cbf6369904db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75d6be518decf615fd299a9e5a6485fbaf7ea7a870d95ec3c7c4cbf6369904db", kill_on_drop: false }`
[INFO] [stdout] 75d6be518decf615fd299a9e5a6485fbaf7ea7a870d95ec3c7c4cbf6369904db