[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] checking CraigHarley/MinimalRustKernel against master#03c609abb6638f9d7f49f34326d4137d07f5cd61 for pr-155945
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCraigHarley%2FMinimalRustKernel" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-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-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/CraigHarley/MinimalRustKernel on toolchain 03c609abb6638f9d7f49f34326d4137d07f5cd61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "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" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "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 os_bootinfo v0.2.1
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] [stderr]   Downloaded ux v0.1.3
[INFO] [stderr]   Downloaded x86_64 v0.2.14
[INFO] [stderr]   Downloaded usize_conversions v0.2.0
[INFO] [stderr]   Downloaded getopts v0.2.18
[INFO] [stderr]   Downloaded fixedvec v0.2.3
[INFO] [stderr]   Downloaded spin v0.4.10
[INFO] [stderr]   Downloaded uart_16550 v0.1.0
[INFO] [stderr]   Downloaded lazy_static v1.2.0
[INFO] [stderr]   Downloaded skeptic v0.5.0
[INFO] [stderr]   Downloaded rand v0.4.3
[INFO] [stderr]   Downloaded array-init v0.0.3
[INFO] [stderr]   Downloaded xmas-elf v0.6.2
[INFO] [stderr]   Downloaded zero v0.1.2
[INFO] [stderr]   Downloaded font8x8 v0.2.4
[INFO] [stderr]   Downloaded pulldown-cmark v0.0.3
[INFO] [stderr]   Downloaded libc v0.2.46
[INFO] [stderr]   Downloaded volatile v0.2.5
[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
     Downloading crates ...
      Downloaded os_bootinfo v0.2.1
      Downloaded bit_field v0.9.0
      Downloaded ux v0.1.3
      Downloaded x86_64 v0.2.14
      Downloaded usize_conversions v0.2.0
      Downloaded getopts v0.2.18
      Downloaded fixedvec v0.2.3
      Downloaded spin v0.4.10
      Downloaded uart_16550 v0.1.0
      Downloaded lazy_static v1.2.0
      Downloaded skeptic v0.5.0
      Downloaded rand v0.4.3
      Downloaded array-init v0.0.3
      Downloaded xmas-elf v0.6.2
      Downloaded zero v0.1.2
      Downloaded font8x8 v0.2.4
      Downloaded pulldown-cmark v0.0.3
      Downloaded libc v0.2.46
      Downloaded volatile v0.2.5
      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.