[INFO] fetching crate tracing-tree 0.4.1...
[INFO] testing tracing-tree-0.4.1 against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] extracting crate tracing-tree 0.4.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate tracing-tree 0.4.1
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate tracing-tree 0.4.1
[INFO] tweaked toml for crates.io crate tracing-tree 0.4.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tracing-tree 0.4.1 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 tracing-tree 0.4.1 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] warning: failed to write cache, path: /workspace/cargo-home/registry/index/index.crates.io-1949cf8c6b5b557f/.cache/nu/-a/nu-ansi-term, error: No space left on device (os error 28)
[INFO] [stderr] error: failed to select a version for the requirement `syn = "^2.0"` (locked to 2.0.106)
[INFO] [stderr] candidate versions found which didn't match: 1.0.26, 1.0.25, 1.0.24, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `tracing-attributes v0.1.30`
[INFO] [stderr]     ... which satisfies dependency `tracing-attributes = "^0.1.28"` (locked to 0.1.30) of package `tracing v0.1.41`
[INFO] [stderr]     ... which satisfies dependency `tracing = "^0.1"` (locked to 0.1.41) of package `tracing-tree v0.4.1 (/workspace/builds/worker-3-tc1/source)`


command failed: exit status: 101

    Blocking waiting for file lock on package cache
    Updating crates.io index
warning: failed to write cache, path: /workspace/cargo-home/registry/index/index.crates.io-1949cf8c6b5b557f/.cache/nu/-a/nu-ansi-term, error: No space left on device (os error 28)
error: failed to select a version for the requirement `syn = "^2.0"` (locked to 2.0.106)
candidate versions found which didn't match: 1.0.26, 1.0.25, 1.0.24, ...
location searched: crates.io index
required by package `tracing-attributes v0.1.30`
    ... which satisfies dependency `tracing-attributes = "^0.1.28"` (locked to 0.1.30) of package `tracing v0.1.41`
    ... which satisfies dependency `tracing = "^0.1"` (locked to 0.1.41) of package `tracing-tree v0.4.1 (/workspace/builds/worker-3-tc1/source)`