[INFO] cloning repository https://github.com/jannikkeye/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/jannikkeye/rust-os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjannikkeye%2Frust-os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjannikkeye%2Frust-os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 57e7a7bae6aa9575974b16f67e6fb6df8d58c89c
[INFO] checking jannikkeye/rust-os against master#a33907a7a5381473eec8bcfa0c56e05a856a911c for pr-151539
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjannikkeye%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/jannikkeye/rust-os
[INFO] finished tweaking git repo https://github.com/jannikkeye/rust-os
[INFO] tweaked toml for git repo https://github.com/jannikkeye/rust-os written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jannikkeye/rust-os on toolchain a33907a7a5381473eec8bcfa0c56e05a856a911c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a33907a7a5381473eec8bcfa0c56e05a856a911c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jannikkeye/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" "+a33907a7a5381473eec8bcfa0c56e05a856a911c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.4.10
[INFO] [stderr]   Downloaded ux v0.1.3
[INFO] [stderr]   Downloaded usize_conversions v0.2.0
[INFO] [stderr]   Downloaded uart_16550 v0.1.0
[INFO] [stderr]   Downloaded array-init v0.0.4
[INFO] [stderr]   Downloaded pc-keyboard v0.3.1
[INFO] [stderr]   Downloaded os_bootinfo v0.2.1
[INFO] [stderr]   Downloaded x86_64 v0.2.14
[INFO] [stderr]   Downloaded fuchsia-cprng v0.1.0
[INFO] [stderr]   Downloaded x86_64 v0.4.0
[INFO] [stderr]   Downloaded skeptic v0.5.0
[INFO] [stderr]   Downloaded bootloader v0.3.12
[INFO] [stderr] error: failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bootloader-0.3.12/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

    Updating crates.io index
    Blocking waiting for file lock on package cache
    Blocking waiting for file lock on package cache
 Downloading crates ...
  Downloaded spin v0.4.10
  Downloaded ux v0.1.3
  Downloaded usize_conversions v0.2.0
  Downloaded uart_16550 v0.1.0
  Downloaded array-init v0.0.4
  Downloaded pc-keyboard v0.3.1
  Downloaded os_bootinfo v0.2.1
  Downloaded x86_64 v0.2.14
  Downloaded fuchsia-cprng v0.1.0
  Downloaded x86_64 v0.4.0
  Downloaded skeptic v0.5.0
  Downloaded bootloader v0.3.12
error: failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bootloader-0.3.12/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.