[INFO] cloning repository https://github.com/funemy/rust-os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/funemy/rust-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffunemy%2Frust-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffunemy%2Frust-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0fdcd30f9bef0f934824778d5ecc41ebf697a7af
[INFO] checking funemy/rust-os against master#8c52f735abd1af9a73941b78fe7ed2ab08b9c0dd for pr-150557
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffunemy%2Frust-os" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/funemy/rust-os
[INFO] finished tweaking git repo https://github.com/funemy/rust-os
[INFO] tweaked toml for git repo https://github.com/funemy/rust-os written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/funemy/rust-os on toolchain 8c52f735abd1af9a73941b78fe7ed2ab08b9c0dd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c52f735abd1af9a73941b78fe7ed2ab08b9c0dd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/funemy/rust-os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c52f735abd1af9a73941b78fe7ed2ab08b9c0dd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.35
[INFO] [stderr]   Downloaded volatile v0.2.6
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] [stderr]   Downloaded pic8259_simple v0.1.1
[INFO] [stderr]   Downloaded spin v0.4.10
[INFO] [stderr]   Downloaded fixedvec v0.2.3
[INFO] [stderr]   Downloaded os_bootinfo v0.2.1
[INFO] [stderr]   Downloaded skeptic v0.5.0
[INFO] [stderr]   Downloaded pc-keyboard v0.3.1
[INFO] [stderr]   Downloaded usize_conversions v0.2.0
[INFO] [stderr]   Downloaded array-init v0.0.3
[INFO] [stderr]   Downloaded bootloader v0.6.0
[INFO] [stderr] error: failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bootloader-0.6.0/Cargo.toml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   the cargo feature `publish-lockfile` has been removed in the 1.37 release
[INFO] [stderr] 
[INFO] [stderr]   This package cannot be used with this version of Cargo, as the unstable feature `publish-lockfile` is no longer supported.
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#publish-lockfile for more information about using this feature.


command failed: exit status: 101

    Blocking waiting for file lock on package cache
    Updating crates.io index
    Blocking waiting for file lock on package cache
 Downloading crates ...
  Downloaded cc v1.0.35
  Downloaded volatile v0.2.6
  Downloaded bit_field v0.9.0
  Downloaded pic8259_simple v0.1.1
  Downloaded spin v0.4.10
  Downloaded fixedvec v0.2.3
  Downloaded os_bootinfo v0.2.1
  Downloaded skeptic v0.5.0
  Downloaded pc-keyboard v0.3.1
  Downloaded usize_conversions v0.2.0
  Downloaded array-init v0.0.3
  Downloaded bootloader v0.6.0
error: failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bootloader-0.6.0/Cargo.toml`

Caused by:
  the cargo feature `publish-lockfile` has been removed in the 1.37 release

  This package cannot be used with this version of Cargo, as the unstable feature `publish-lockfile` is no longer supported.
  See https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#publish-lockfile for more information about using this feature.