[INFO] updating cached repository https://github.com/imondrag/toy_os
[INFO] running `"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"`
[INFO] [stderr] From https://github.com/imondrag/toy_os
[INFO] [stderr]  * [new branch]      dev        -> dev
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 08d34b5ca9700f2d708a7498175e7f1609391cff
[INFO] checking imondrag/toy_os against nightly-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimondrag%2Ftoy_os" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/imondrag/toy_os on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/imondrag/toy_os
[INFO] finished tweaking git repo https://github.com/imondrag/toy_os
[INFO] tweaked toml for git repo https://github.com/imondrag/toy_os written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/imondrag/toy_os already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=allow" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b6cafe1c34dc8f13b7fed0519bc4ac2e20fc86b0357c199f437aaed247fcaf7c
[INFO] running `"docker" "start" "-a" "b6cafe1c34dc8f13b7fed0519bc4ac2e20fc86b0357c199f437aaed247fcaf7c"`
[INFO] [stderr]     Checking volatile v0.2.5
[INFO] [stderr]     Checking x86_64 v0.3.4
[INFO] [stderr]    Compiling skeptic v0.5.0
[INFO] [stderr]    Compiling fixedvec v0.2.3
[INFO] [stderr]     Checking bootloader v0.3.11
[INFO] [stderr]     Checking toy_os v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: the trait bound `x86_64::registers::model_specific::Efer: core::fmt::LowerHex` is not satisfied
[INFO] [stderr]   --> src/main.rs:30:50
[INFO] [stderr]    |
[INFO] [stderr] 30 |     writeln!(Writer, "These are my flags: {:x}", msr);
[INFO] [stderr]    |                                                  ^^^ the trait `core::fmt::LowerHex` is not implemented for `x86_64::registers::model_specific::Efer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: required by `core::fmt::LowerHex::fmt`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `toy_os`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0277]: the trait bound `x86_64::registers::model_specific::Efer: core::fmt::LowerHex` is not satisfied
[INFO] [stderr]   --> src/main.rs:30:50
[INFO] [stderr]    |
[INFO] [stderr] 30 |     writeln!(Writer, "These are my flags: {:x}", msr);
[INFO] [stderr]    |                                                  ^^^ the trait `core::fmt::LowerHex` is not implemented for `x86_64::registers::model_specific::Efer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: required by `core::fmt::LowerHex::fmt`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `toy_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b6cafe1c34dc8f13b7fed0519bc4ac2e20fc86b0357c199f437aaed247fcaf7c"`
[INFO] running `"docker" "rm" "-f" "b6cafe1c34dc8f13b7fed0519bc4ac2e20fc86b0357c199f437aaed247fcaf7c"`
[INFO] [stdout] b6cafe1c34dc8f13b7fed0519bc4ac2e20fc86b0357c199f437aaed247fcaf7c