[INFO] cloning repository https://github.com/CraigHarley/MinimalRustKernel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CraigHarley/MinimalRustKernel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraigHarley%2FMinimalRustKernel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraigHarley%2FMinimalRustKernel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab128cda5cf19b96c3a7b7e61728477b6f861df3
[INFO] testing CraigHarley/MinimalRustKernel against master#f9988fefd3add01f414f52b414308e7872622fee for pr-155114
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraigHarley%2FMinimalRustKernel" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/CraigHarley/MinimalRustKernel
[INFO] finished tweaking git repo https://github.com/CraigHarley/MinimalRustKernel
[INFO] tweaked toml for git repo https://github.com/CraigHarley/MinimalRustKernel written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/CraigHarley/MinimalRustKernel on toolchain f9988fefd3add01f414f52b414308e7872622fee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/CraigHarley/MinimalRustKernel 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" "+f9988fefd3add01f414f52b414308e7872622fee" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded usize_conversions v0.2.0
[INFO] [stderr]   Downloaded os_bootinfo v0.2.1
[INFO] [stderr]   Downloaded bitflags v1.0.4
[INFO] [stderr]   Downloaded remove_dir_all v0.5.1
[INFO] [stderr]   Downloaded lazy_static v1.2.0
[INFO] [stderr]   Downloaded tempdir v0.3.7
[INFO] [stderr]   Downloaded array-init v0.0.3
[INFO] [stderr]   Downloaded bootloader v0.3.11
[INFO] [stderr] error: failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bootloader-0.3.11/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.


overridden task result to broken:broken-deps

Caused by:
    broken dependencies: 
    
        Blocking waiting for file lock on package cache
        Updating crates.io index
        Blocking waiting for file lock on package cache
        Blocking waiting for file lock on package cache
     Downloading crates ...
      Downloaded usize_conversions v0.2.0
      Downloaded os_bootinfo v0.2.1
      Downloaded bitflags v1.0.4
      Downloaded remove_dir_all v0.5.1
      Downloaded lazy_static v1.2.0
      Downloaded tempdir v0.3.7
      Downloaded array-init v0.0.3
      Downloaded bootloader v0.3.11
    error: failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/bootloader-0.3.11/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.