[INFO] fetching crate silkgen 0.4.0...
[INFO] checking silkgen-0.4.0 against master#8424f8e8cdf07010967a57584fd647b30e930d4d for pr-120095
[INFO] extracting crate silkgen 0.4.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate silkgen 0.4.0 on toolchain 8424f8e8cdf07010967a57584fd647b30e930d4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate silkgen 0.4.0
[INFO] finished tweaking crates.io crate silkgen 0.4.0
[INFO] tweaked toml for crates.io crate silkgen 0.4.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate silkgen 0.4.0 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" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] Updating crates.io index
[INFO] [stderr] Downloading crates ...
[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/fixed-macro-impl/1.2.0/download` (99.84.160.119), got 503
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[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/fixed-macro/1.2.0/download` (99.84.160.119), got 503
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[INFO] [stderr] warning: spurious network error (2 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/fixed-macro/1.2.0/download` (99.84.160.119), got 503
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[INFO] [stderr] Downloaded fixed-macro-types v1.2.0
[INFO] [stderr] Downloaded fixed-macro-impl v1.2.0
[INFO] [stderr] warning: spurious network error (1 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/fixed-macro/1.2.0/download` (99.84.160.119), got 503
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[INFO] [stderr] error: failed to download from `https://crates.io/api/v1/crates/fixed-macro/1.2.0/download`
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[INFO] [stderr] Caused by:
[INFO] [stderr] failed to get successful HTTP response from `https://crates.io/api/v1/crates/fixed-macro/1.2.0/download` (99.84.160.119), got 503
[INFO] [stderr] debug headers:
[INFO] [stderr] x-cache: Error from cloudfront
[INFO] [stderr] x-amz-cf-pop: ORD52-C2
[INFO] [stderr] x-amz-cf-id: LxDM1UaCRZ5X4Lx3X1m3ZSYfPxHPxTstj8nK-Rih4AWuKlvDuy0myQ==
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[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.