[INFO] cloning repository https://github.com/nulldatamap/mubah
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nulldatamap/mubah" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnulldatamap%2Fmubah", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnulldatamap%2Fmubah'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 91de8c46cea4efdf208783b865902f85c189e04c
[INFO] checking nulldatamap/mubah against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnulldatamap%2Fmubah" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nulldatamap/mubah on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nulldatamap/mubah
[INFO] finished tweaking git repo https://github.com/nulldatamap/mubah
[INFO] tweaked toml for git repo https://github.com/nulldatamap/mubah written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/nulldatamap/mubah 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.1.8
[INFO] [stderr]   Downloaded cocoa v0.1.3
[INFO] [stderr]   Downloaded interpolation v0.1.0
[INFO] [stderr]   Downloaded core-graphics v0.1.0
[INFO] [stderr]   Downloaded piston-viewport v0.1.0
[INFO] [stderr]   Downloaded color_quant v1.0.0
[INFO] [stderr]   Downloaded vecmath v0.1.1
[INFO] [stderr]   Downloaded bitflags v0.1.1
[INFO] [stderr]   Downloaded cgmath v0.2.0
[INFO] [stderr] error: failed to parse manifest at `/workspace/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/cgmath-0.2.0/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.