[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#ff086354c9fc93e1da1d2f4d255456624fbcd099 for pr-153513
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffunemy%2Frust-os" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-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-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/funemy/rust-os on toolchain ff086354c9fc93e1da1d2f4d255456624fbcd099
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "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" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "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]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.35
[INFO] [stderr]   Downloaded spin v0.4.10
[INFO] [stderr]   Downloaded ux v0.1.3
[INFO] [stderr]   Downloaded cast v0.2.2
[INFO] [stderr]   Downloaded volatile v0.2.6
[INFO] [stderr]   Downloaded array-init v0.0.4
[INFO] [stderr]   Downloaded x86_64 v0.6.0
[INFO] [stderr]   Downloaded remove_dir_all v0.5.1
[INFO] [stderr]   Downloaded pic8259_simple v0.1.1
[INFO] [stderr]   Downloaded zero v0.1.2
[INFO] [stderr]   Downloaded xmas-elf v0.6.2
[INFO] [stderr]   Downloaded skeptic v0.5.0
[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
 Downloading crates ...
  Downloaded cc v1.0.35
  Downloaded spin v0.4.10
  Downloaded ux v0.1.3
  Downloaded cast v0.2.2
  Downloaded volatile v0.2.6
  Downloaded array-init v0.0.4
  Downloaded x86_64 v0.6.0
  Downloaded remove_dir_all v0.5.1
  Downloaded pic8259_simple v0.1.1
  Downloaded zero v0.1.2
  Downloaded xmas-elf v0.6.2
  Downloaded skeptic v0.5.0
  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.