[INFO] updating cached repository https://github.com/bnkelley/rhel7-system76-power
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 53a99d83666b718821dc25fdc4107b9b409a59b7
[INFO] checking bnkelley/rhel7-system76-power against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnkelley%2Frhel7-system76-power" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bnkelley/rhel7-system76-power on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bnkelley/rhel7-system76-power
[INFO] finished tweaking git repo https://github.com/bnkelley/rhel7-system76-power
[INFO] tweaked toml for git repo https://github.com/bnkelley/rhel7-system76-power written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/bnkelley/rhel7-system76-power already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 381d83cc4f5dc9eec7a944a1c04002a62dd43ee566b2be3ef4666be69eefb6b0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "381d83cc4f5dc9eec7a944a1c04002a62dd43ee566b2be3ef4666be69eefb6b0"`
[INFO] [stderr]     Checking numtoa v0.2.3
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]     Checking fern v0.5.8
[INFO] [stderr]     Checking dbus v0.6.2
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling smart-default v0.5.2
[INFO] [stderr]     Checking sysfs-class v0.1.1 (https://github.com/pop-os/sysfs-class#7bc914e0)
[INFO] [stderr]    Compiling vergen v0.1.1
[INFO] [stderr]    Compiling system76-power v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling err-derive v0.1.5
[INFO] [stderr]     Checking intel-pstate v0.2.0
[INFO] [stderr] error[E0277]: the `?` operator can only be applied to values that implement `std::ops::Try`
[INFO] [stderr]   --> examples/fan.rs:12:18
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let daemon = FanDaemon::new(false)?;
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `system76_power::fan::FanDaemon`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `system76_power::fan::FanDaemon`
[INFO] [stderr]    = note: required by `std::ops::Try::into_result`
[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 `system76-power`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "381d83cc4f5dc9eec7a944a1c04002a62dd43ee566b2be3ef4666be69eefb6b0"`
[INFO] running `"docker" "rm" "-f" "381d83cc4f5dc9eec7a944a1c04002a62dd43ee566b2be3ef4666be69eefb6b0"`
[INFO] [stdout] 381d83cc4f5dc9eec7a944a1c04002a62dd43ee566b2be3ef4666be69eefb6b0