[INFO] cloning repository https://github.com/mtsr/amethyst_experiment
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mtsr/amethyst_experiment" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmtsr%2Famethyst_experiment", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmtsr%2Famethyst_experiment'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a283a43186327acd1a583fd6e13c3cb2dbb85505
[INFO] testing mtsr/amethyst_experiment against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmtsr%2Famethyst_experiment" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mtsr/amethyst_experiment on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mtsr/amethyst_experiment
[INFO] finished tweaking git repo https://github.com/mtsr/amethyst_experiment
[INFO] tweaked toml for git repo https://github.com/mtsr/amethyst_experiment written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mtsr/amethyst_experiment 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" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-complex v0.1.33
[INFO] [stderr]   Downloaded target_build_utils v0.1.1
[INFO] [stderr]   Downloaded x11-dl v2.8.0
[INFO] [stderr]   Downloaded fnv v1.0.3
[INFO] [stderr]   Downloaded osmesa-sys v0.1.0
[INFO] [stderr]   Downloaded threadpool v1.3.1
[INFO] [stderr]   Downloaded libloading v0.2.4
[INFO] [stderr]   Downloaded serde v0.8.0
[INFO] [stderr]   Downloaded gfx v0.11.0
[INFO] [stderr]   Downloaded draw_state v0.6.0
[INFO] [stderr]   Downloaded specs v0.7.0
[INFO] [stderr]   Downloaded yaml-rust v0.3.3
[INFO] [stderr]   Downloaded genmesh v0.4.0
[INFO] [stderr]   Downloaded atom v0.3.4
[INFO] [stderr]   Downloaded gfx_core v0.3.1
[INFO] [stderr]   Downloaded gfx_device_gl v0.10.0
[INFO] [stderr]   Downloaded serde_json v0.8.0
[INFO] [stderr]   Downloaded glutin v0.5.2
[INFO] [stderr]   Downloaded gleam v0.2.20
[INFO] [stderr]   Downloaded cgmath v0.7.0
[INFO] [stderr] error: failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/cgmath-0.7.0/Cargo.toml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   dependency (rustc-serialize) specified without providing a local path, Git repository, version, or workspace dependency to use
[ERROR] this task or one of its parent failed!
[ERROR] command failed: exit status: 101
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
