[INFO] cloning repository https://github.com/bugabinga/buga_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bugabinga/buga_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbugabinga%2Fbuga_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbugabinga%2Fbuga_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d9e8077a9e8b10b0990482d6ac8174a609d4234
[INFO] checking bugabinga/buga_os against try#9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c for pr-79472
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbugabinga%2Fbuga_os" "/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/bugabinga/buga_os on toolchain 9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bugabinga/buga_os
[INFO] finished tweaking git repo https://github.com/bugabinga/buga_os
[INFO] tweaked toml for git repo https://github.com/bugabinga/buga_os written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/bugabinga/buga_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded getopts v0.2.17
[INFO] [stderr]   Downloaded backtrace v0.3.7
[INFO] [stderr]   Downloaded cargo_metadata v0.5.4
[INFO] [stderr]   Downloaded spin v0.4.8
[INFO] [stderr]   Downloaded serde v1.0.52
[INFO] [stderr]   Downloaded syn v0.13.7
[INFO] [stderr]   Downloaded if_chain v0.1.2
[INFO] [stderr]   Downloaded volatile v0.2.4
[INFO] [stderr]   Downloaded serde_derive v1.0.52
[INFO] [stderr]   Downloaded cc v1.0.15
[INFO] [stderr]   Downloaded clippy v0.0.197
[INFO] [stderr]   Downloaded clippy_lints v0.0.197
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e16c97b56acca72d3a2e77becf3f6f26444a0d083bd990ec493650c91e220f93
[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" "e16c97b56acca72d3a2e77becf3f6f26444a0d083bd990ec493650c91e220f93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e16c97b56acca72d3a2e77becf3f6f26444a0d083bd990ec493650c91e220f93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e16c97b56acca72d3a2e77becf3f6f26444a0d083bd990ec493650c91e220f93", kill_on_drop: false }`
[INFO] [stdout] e16c97b56acca72d3a2e77becf3f6f26444a0d083bd990ec493650c91e220f93
[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=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" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 452bb1a49dc80f25df7e00f3e3b7a62c0ea52dc11d6022f475127947bc1baa92
[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" "452bb1a49dc80f25df7e00f3e3b7a62c0ea52dc11d6022f475127947bc1baa92", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling cc v1.0.15
[INFO] [stderr]    Compiling serde v1.0.52
[INFO] [stderr]    Compiling spin v0.4.8
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling getopts v0.2.17
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling clippy v0.0.197
[INFO] [stderr]    Compiling quine-mc_cluskey v0.2.4
[INFO] [stderr]    Compiling if_chain v0.1.2
[INFO] [stderr]     Checking volatile v0.2.4
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stdout] error: the legacy LLVM-style asm! syntax is no longer supported
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.8/src/util.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     unsafe { asm!("pause" :::: "volatile"); }
[INFO] [stdout]   |              ----^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |              |
[INFO] [stdout]   |              help: replace with: `llvm_asm!`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider migrating to the new asm! syntax specified in RFC 2873
[INFO] [stdout]   = note: alternatively, switch to llvm_asm! to keep your code working as it is
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the legacy LLVM-style asm! syntax is no longer supported
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.8/src/util.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     unsafe { asm!("pause" :::: "volatile"); }
[INFO] [stdout]   |              ----^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |              |
[INFO] [stdout]   |              help: replace with: `llvm_asm!`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider migrating to the new asm! syntax specified in RFC 2873
[INFO] [stdout]   = note: alternatively, switch to llvm_asm! to keep your code working as it is
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spin`
[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" "452bb1a49dc80f25df7e00f3e3b7a62c0ea52dc11d6022f475127947bc1baa92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "452bb1a49dc80f25df7e00f3e3b7a62c0ea52dc11d6022f475127947bc1baa92", kill_on_drop: false }`
[INFO] [stdout] 452bb1a49dc80f25df7e00f3e3b7a62c0ea52dc11d6022f475127947bc1baa92