[INFO] cloning repository https://github.com/mgottschlag/rust-stm32f4-blinky
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mgottschlag/rust-stm32f4-blinky" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmgottschlag%2Frust-stm32f4-blinky", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmgottschlag%2Frust-stm32f4-blinky'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0fb4a0c7c5f741719d2055a7c98de084d0abda9d
[INFO] checking mgottschlag/rust-stm32f4-blinky against try#575650af7d7ca88602df28e39d27bf3e456c306e for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmgottschlag%2Frust-stm32f4-blinky" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mgottschlag/rust-stm32f4-blinky on toolchain 575650af7d7ca88602df28e39d27bf3e456c306e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7/source/.cargo/config
[INFO] started tweaking git repo https://github.com/mgottschlag/rust-stm32f4-blinky
[INFO] finished tweaking git repo https://github.com/mgottschlag/rust-stm32f4-blinky
[INFO] tweaked toml for git repo https://github.com/mgottschlag/rust-stm32f4-blinky written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/mgottschlag/rust-stm32f4-blinky already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/mgottschlag/stm32f429.git`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bare-metal v0.1.1
[INFO] [stderr]   Downloaded aligned v0.1.1
[INFO] [stderr]   Downloaded cortex-m v0.3.1
[INFO] [stderr]   Downloaded cortex-m-rt v0.3.6
[INFO] [stderr]   Downloaded cortex-m-semihosting v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 589b57dd107aecb9d377b20dc1005d2f457a39b84a4570448269fe1ceee6fc04
[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" "589b57dd107aecb9d377b20dc1005d2f457a39b84a4570448269fe1ceee6fc04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "589b57dd107aecb9d377b20dc1005d2f457a39b84a4570448269fe1ceee6fc04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "589b57dd107aecb9d377b20dc1005d2f457a39b84a4570448269fe1ceee6fc04", kill_on_drop: false }`
[INFO] [stdout] 589b57dd107aecb9d377b20dc1005d2f457a39b84a4570448269fe1ceee6fc04
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c733503362fad1dee3cb112504ca2ea647efb6390deef37dba350aa7cdc1ad00
[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" "c733503362fad1dee3cb112504ca2ea647efb6390deef37dba350aa7cdc1ad00", kill_on_drop: false }`
[INFO] [stderr]    Compiling cortex-m v0.3.1
[INFO] [stderr]     Checking vcell v0.1.0
[INFO] [stderr]     Checking aligned v0.1.1
[INFO] [stderr]     Checking bare-metal v0.1.1
[INFO] [stderr]    Compiling cortex-m-rt v0.3.6
[INFO] [stderr]     Checking r0 v0.2.2
[INFO] [stderr]     Checking cortex-m-semihosting v0.2.0
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stdout] error[E0635]: unknown feature `const_unsafe_cell_new`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/bare-metal-0.1.1/src/lib.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(const_fn,const_unsafe_cell_new)]
[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 E0635`.
[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" "c733503362fad1dee3cb112504ca2ea647efb6390deef37dba350aa7cdc1ad00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c733503362fad1dee3cb112504ca2ea647efb6390deef37dba350aa7cdc1ad00", kill_on_drop: false }`
[INFO] [stdout] c733503362fad1dee3cb112504ca2ea647efb6390deef37dba350aa7cdc1ad00