[INFO] updating cached repository https://github.com/robroyx3m/D7018_Task4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 06063dc86cf2df5b88aa7a22835a418c428d6179
[INFO] testing robroyx3m/D7018_Task4 against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobroyx3m%2FD7018_Task4" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/robroyx3m/D7018_Task4 on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/robroyx3m/D7018_Task4
[INFO] finished tweaking git repo https://github.com/robroyx3m/D7018_Task4
[INFO] tweaked toml for git repo https://github.com/robroyx3m/D7018_Task4 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/robroyx3m/D7018_Task4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 24e54c2e8182d5b17bdab9e2be1fa1a3e8208864bb0375399060468342d37ebc
[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" "24e54c2e8182d5b17bdab9e2be1fa1a3e8208864bb0375399060468342d37ebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24e54c2e8182d5b17bdab9e2be1fa1a3e8208864bb0375399060468342d37ebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24e54c2e8182d5b17bdab9e2be1fa1a3e8208864bb0375399060468342d37ebc", kill_on_drop: false }`
[INFO] [stdout] 24e54c2e8182d5b17bdab9e2be1fa1a3e8208864bb0375399060468342d37ebc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", 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] a70483f8d6a41981ed300873f11755f0ca68398f318566cce5bf074ba7d9f1db
[INFO] running `Command { std: "docker" "start" "-a" "a70483f8d6a41981ed300873f11755f0ca68398f318566cce5bf074ba7d9f1db", kill_on_drop: false }`
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.3.1
[INFO] [stderr]    Compiling cortex-m-rt v0.3.7
[INFO] [stderr]    Compiling aligned v0.1.1
[INFO] [stderr]    Compiling bare-metal v0.1.1
[INFO] [stderr]    Compiling cortex-m-semihosting v0.2.0
[INFO] [stderr]    Compiling volatile-register v0.2.0
[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" "a70483f8d6a41981ed300873f11755f0ca68398f318566cce5bf074ba7d9f1db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a70483f8d6a41981ed300873f11755f0ca68398f318566cce5bf074ba7d9f1db", kill_on_drop: false }`
[INFO] [stdout] a70483f8d6a41981ed300873f11755f0ca68398f318566cce5bf074ba7d9f1db