[INFO] cloning repository https://github.com/danrien/a_new_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danrien/a_new_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanrien%2Fa_new_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanrien%2Fa_new_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 957071326d43d645e845bbef446b8bbe1e337704
[INFO] checking danrien/a_new_os against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanrien%2Fa_new_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/danrien/a_new_os
[INFO] finished tweaking git repo https://github.com/danrien/a_new_os
[INFO] tweaked toml for git repo https://github.com/danrien/a_new_os written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/danrien/a_new_os on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/danrien/a_new_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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "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 bitflags v1.0.4
[INFO] [stderr]   Downloaded ux v0.1.3
[INFO] [stderr]   Downloaded volatile v0.2.5
[INFO] [stderr]   Downloaded uart_16550 v0.1.0
[INFO] [stderr]   Downloaded os_bootinfo v0.2.1
[INFO] [stderr]   Downloaded usize_conversions v0.2.0
[INFO] [stderr]   Downloaded spin v0.4.10
[INFO] [stderr]   Downloaded x86_64 v0.2.14
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] [stderr]   Downloaded pulldown-cmark v0.0.3
[INFO] [stderr]   Downloaded font8x8 v0.2.4
[INFO] [stderr]   Downloaded zero v0.1.2
[INFO] [stderr]   Downloaded unicode-width v0.1.5
[INFO] [stderr]   Downloaded nodrop v0.1.13
[INFO] [stderr]   Downloaded skeptic v0.5.0
[INFO] [stderr]   Downloaded array-init v0.0.3
[INFO] [stderr]   Downloaded fixedvec v0.2.3
[INFO] [stderr]   Downloaded getopts v0.2.18
[INFO] [stderr]   Downloaded xmas-elf v0.6.2
[INFO] [stderr]   Downloaded proc-macro2 v0.4.24
[INFO] [stderr]   Downloaded lazy_static v1.2.0
[INFO] [stderr]   Downloaded quote v0.6.10
[INFO] [stderr]   Downloaded rand v0.4.3
[INFO] [stderr]   Downloaded syn v0.14.9
[INFO] [stderr]   Downloaded remove_dir_all v0.5.1
[INFO] [stderr]   Downloaded tempdir v0.3.7
[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.


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
    Blocking waiting for file lock on package cache
 Downloading crates ...
  Downloaded bitflags v1.0.4
  Downloaded ux v0.1.3
  Downloaded volatile v0.2.5
  Downloaded uart_16550 v0.1.0
  Downloaded os_bootinfo v0.2.1
  Downloaded usize_conversions v0.2.0
  Downloaded spin v0.4.10
  Downloaded x86_64 v0.2.14
  Downloaded bit_field v0.9.0
  Downloaded pulldown-cmark v0.0.3
  Downloaded font8x8 v0.2.4
  Downloaded zero v0.1.2
  Downloaded unicode-width v0.1.5
  Downloaded nodrop v0.1.13
  Downloaded skeptic v0.5.0
  Downloaded array-init v0.0.3
  Downloaded fixedvec v0.2.3
  Downloaded getopts v0.2.18
  Downloaded xmas-elf v0.6.2
  Downloaded proc-macro2 v0.4.24
  Downloaded lazy_static v1.2.0
  Downloaded quote v0.6.10
  Downloaded rand v0.4.3
  Downloaded syn v0.14.9
  Downloaded remove_dir_all v0.5.1
  Downloaded tempdir v0.3.7
  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.