[INFO] fetching crate sapling 0.1.0...
[INFO] testing sapling-0.1.0 against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] extracting crate sapling 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate sapling 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate sapling 0.1.0
[INFO] tweaked toml for crates.io crate sapling 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sapling 0.1.0 on toolchain 2fd6efc32704647e64d3d646d21c4c68eae100e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sapling 0.1.0 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" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] warning: failed to write cache, path: /workspace/cargo-home/registry/index/index.crates.io-1949cf8c6b5b557f/.cache/fa/ce/facet, error: No space left on device (os error 28)
[INFO] [stderr] error: failed to select a version for the requirement `syn = "^2.0.81"` (locked to 2.0.109)
[INFO] [stderr] candidate versions found which didn't match: 2.0.103, 2.0.102, 2.0.101, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `serde_derive v1.0.228`
[INFO] [stderr]     ... which satisfies dependency `serde_derive = "=1.0.228"` (locked to 1.0.228) of package `serde_core v1.0.228`
[INFO] [stderr]     ... which satisfies dependency `serde_core = "=1.0.228"` (locked to 1.0.228) of package `serde v1.0.228`
[INFO] [stderr]     ... which satisfies dependency `serde = "^1.0.85"` (locked to 1.0.228) of package `bstr v1.12.1`
[INFO] [stderr]     ... which satisfies dependency `bstr = "^1.0.1"` (locked to 1.12.1) of package `assert_cmd v2.1.1`
[INFO] [stderr]     ... which satisfies dependency `assert_cmd = "^2.1.1"` (locked to 2.1.1) of package `sapling v0.1.0 (/workspace/builds/worker-7-tc1/source)`


command failed: exit status: 101

    Updating crates.io index
warning: failed to write cache, path: /workspace/cargo-home/registry/index/index.crates.io-1949cf8c6b5b557f/.cache/fa/ce/facet, error: No space left on device (os error 28)
error: failed to select a version for the requirement `syn = "^2.0.81"` (locked to 2.0.109)
candidate versions found which didn't match: 2.0.103, 2.0.102, 2.0.101, ...
location searched: crates.io index
required by package `serde_derive v1.0.228`
    ... which satisfies dependency `serde_derive = "=1.0.228"` (locked to 1.0.228) of package `serde_core v1.0.228`
    ... which satisfies dependency `serde_core = "=1.0.228"` (locked to 1.0.228) of package `serde v1.0.228`
    ... which satisfies dependency `serde = "^1.0.85"` (locked to 1.0.228) of package `bstr v1.12.1`
    ... which satisfies dependency `bstr = "^1.0.1"` (locked to 1.12.1) of package `assert_cmd v2.1.1`
    ... which satisfies dependency `assert_cmd = "^2.1.1"` (locked to 2.1.1) of package `sapling v0.1.0 (/workspace/builds/worker-7-tc1/source)`